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#1
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Speaking of broken spark plugs...
My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty
noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. So, ***if*** we were dealing with a spark plug which was broken due to incorrect length, wouldn't that have happened almost immediately after the plugs were installed? Assuming yes, what else are we left with? Right length, wrong plug (temperature)? Wrong torque? Defective plug? Seems like some things could point to the mechanic, as unlikely as that seems based on his track record. Or, manufacturer. Any other thoughts on this? |
#2
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Speaking of broken spark plugs...
On Tue, 08 Dec 2009 10:16:08 -0500, JoeSpareBedroom wrote:
My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. What are the oil and coolant levels like? Any oil in the coolant expansion tank? All sorts of things can make "nasty noises" - are we talking knocking, scraping, high-pitched squeal, something else? At the bad end of the scale, valves hitting pistons due to worn timing gear (although I'm not sure if the Legacy's engine is an interference design where that could happen), or a major bearing fault. At the other end of the scale, I had a locking tab break on a cam gear in an engine once which made a heck of a noise, but it was maybe a $1 part and a ten minute fix. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. Can you get a second opinion? Maybe tow it to a garage if you have to so someone can listen to it (just keep in mind that you're free to tow it to more than one garage - don't feel obligated to leave it with the first garage you go to) Lots of mechanics will be able to narrow it down by ear (and experience). So, ***if*** we were dealing with a spark plug which was broken due to incorrect length, wouldn't that have happened almost immediately after the plugs were installed? Assuming yes, what else are we left with? Right length, wrong plug (temperature)? Wrong torque? Defective plug? What makes you think it's related to plugs? Was something changed recently that you didn't mention in your post? |
#3
Posted to alt.home.repair
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Speaking of broken spark plugs...
Unless one of the sparkplugs was changed just before starting it up
that time, that seems unlikely. You didn't give us very much info about the problem... Was it running badly or just making noise? Can you describe the noise at all? Are you mechanically inclined enough to at least remove the spark plugs and accessory belts and run the starter? That will narrow things way down with a minimum of effort. (A lot of horrible "engine" noises turn out to be failed alternators, water pumps, etc...) |
#4
Posted to alt.home.repair
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Speaking of broken spark plugs...
"Jules" wrote in message
news On Tue, 08 Dec 2009 10:16:08 -0500, JoeSpareBedroom wrote: My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. What are the oil and coolant levels like? Any oil in the coolant expansion tank? All sorts of things can make "nasty noises" - are we talking knocking, scraping, high-pitched squeal, something else? At the bad end of the scale, valves hitting pistons due to worn timing gear (although I'm not sure if the Legacy's engine is an interference design where that could happen), or a major bearing fault. At the other end of the scale, I had a locking tab break on a cam gear in an engine once which made a heck of a noise, but it was maybe a $1 part and a ten minute fix. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. Can you get a second opinion? Maybe tow it to a garage if you have to so someone can listen to it (just keep in mind that you're free to tow it to more than one garage - don't feel obligated to leave it with the first garage you go to) Lots of mechanics will be able to narrow it down by ear (and experience). So, ***if*** we were dealing with a spark plug which was broken due to incorrect length, wouldn't that have happened almost immediately after the plugs were installed? Assuming yes, what else are we left with? Right length, wrong plug (temperature)? Wrong torque? Defective plug? What makes you think it's related to plugs? Was something changed recently that you didn't mention in your post? I thought of plugs because it's the only one of many possible causes I've read about in the past day. Misleading, but it's all I had in mind at the moment. |
#5
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Speaking of broken spark plugs...
"Larry Fishel" wrote in message
... Unless one of the sparkplugs was changed just before starting it up that time, that seems unlikely. You didn't give us very much info about the problem... Was it running badly or just making noise? Can you describe the noise at all? Are you mechanically inclined enough to at least remove the spark plugs and accessory belts and run the starter? That will narrow things way down with a minimum of effort. (A lot of horrible "engine" noises turn out to be failed alternators, water pumps, etc...) Mechanically inclined enough, but not enough time, and it's winter here. These things never seem to happen when the weather's decent. So, I'm just gathering ideas. |
#6
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Speaking of broken spark plugs...
"JoeSpareBedroom" wrote in
: My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. So, ***if*** we were dealing with a spark plug which was broken due to incorrect length, wouldn't that have happened almost immediately after the plugs were installed? Assuming yes, what else are we left with? Right length, wrong plug (temperature)? Wrong torque? Defective plug? Seems like some things could point to the mechanic, as unlikely as that seems based on his track record. Or, manufacturer. Any other thoughts on this? Who knows? But pulling the plugs and looking at them might tell a lot although pulling the plugs can be involved in itself on some vehicles. I'm sure any decent shop has a camera they can put in the hole to look inside the cylinder. I mean they have cameras they can run in house pipes, in your veins, in your pecker and up your can. Nasty noises in the motor could be anything from bad gas to bad bearings. rings, crank, valves and cams. And all these computer chips can make a vehicle do weird stuff too. Gee I miss my simple 77 GMC and 61 Falcon. Anyway, if mechanic is a high suspect, whoever does the diagnostic has to be credible on paper if she plans on going back at the mechanic for compensation. |
#7
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Speaking of broken spark plugs...
"Larry Fishel" wrote in message
... Unless one of the sparkplugs was changed just before starting it up that time, that seems unlikely. You didn't give us very much info about the problem... Was it running badly or just making noise? Can you describe the noise at all? Are you mechanically inclined enough to at least remove the spark plugs and accessory belts and run the starter? That will narrow things way down with a minimum of effort. (A lot of horrible "engine" noises turn out to be failed alternators, water pumps, etc...) Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. What a mess. |
#8
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Speaking of broken spark plugs...
In article ,
"JoeSpareBedroom" wrote: My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. So, ***if*** we were dealing with a spark plug which was broken due to incorrect length, wouldn't that have happened almost immediately after the plugs were installed? Assuming yes, what else are we left with? Right length, wrong plug (temperature)? Wrong torque? Defective plug? Seems like some things could point to the mechanic, as unlikely as that seems based on his track record. Or, manufacturer. Any other thoughts on this? A friend of mine has one of those confounded new Beetles sitting in his driveway. Well, it's a few years old, but he bought it new. Six months ago he put in some newfangled designer spark plugs that cost way too much money. A month later, one of them disintegrated and trashed the cylinder. So now he needs an engine rebuild. Nice. |
#9
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Speaking of broken spark plugs...
I would definitely have it diagnosed to find out exactly what the
problem is, rather than just guesses. If it does turn out that the engine is shot, an alternative could be a wrecking yard engine. If the car is in otherwise good shape,paid for, and she likes the car, it could make sense to fix it, even if if it does cost $1000 or so. That would be a judgement call on her part. Repairs may cost what 4-6 payments on a replacement car would be. Larry |
#10
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Speaking of broken spark plugs...
On Tue, 8 Dec 2009 10:16:08 -0500, JoeSpareBedroom wrote:
My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. Unless you're primarily interested in adding a room, or perhaps replacing a toilet, this doesn't belong in a.h.r., even if you live in the car. Try rec.autos.tech. If the mechanic is competant, he can find out if the problem is major without doing any dissassembly at all. There's probably no way he can damage it worse than has already occured and the problem might just be the bearings of an accessory. If the mechanic is unwilling to start the car then find another. It is insane to write off the car without even starting it again and listening for where the noise is coming from. |
#11
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Speaking of broken spark plugs...
"Smitty Two" wrote in message
news In article , "JoeSpareBedroom" wrote: My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. So, ***if*** we were dealing with a spark plug which was broken due to incorrect length, wouldn't that have happened almost immediately after the plugs were installed? Assuming yes, what else are we left with? Right length, wrong plug (temperature)? Wrong torque? Defective plug? Seems like some things could point to the mechanic, as unlikely as that seems based on his track record. Or, manufacturer. Any other thoughts on this? A friend of mine has one of those confounded new Beetles sitting in his driveway. Well, it's a few years old, but he bought it new. Six months ago he put in some newfangled designer spark plugs that cost way too much money. A month later, one of them disintegrated and trashed the cylinder. So now he needs an engine rebuild. Nice. Yeah - that's why when my son had two web pages full of plugs in front of him, trying to decide which ones were the prettiest, I said "Go to the Toyota dealer. Go to the Toyota dealer. Go to the Toyota dealer. Go to the Toyota dealer." He did. He's happy. |
#12
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Speaking of broken spark plugs...
On Tue, 8 Dec 2009 11:13:47 -0500, JoeSpareBedroom wrote:
"Larry Fishel" wrote in message ... Unless one of the sparkplugs was changed just before starting it up that time, that seems unlikely. You didn't give us very much info about the problem... Was it running badly or just making noise? Can you describe the noise at all? Are you mechanically inclined enough to at least remove the spark plugs and accessory belts and run the starter? That will narrow things way down with a minimum of effort. (A lot of horrible "engine" noises turn out to be failed alternators, water pumps, etc...) Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. Whoever replaced the plugs last or perhaps the plug maker owes you an engine overhaul. |
#13
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Speaking of broken spark plugs...
JoeSpareBedroom wrote:
.... Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. What a mess. A plug "broken"??? How? What broke? In 50 years w/ all personal automobiles and light trucks plus tractors and other farm equipment BD (before diesel) I've never seen a broken plug other than breaking the insulation or somesuch external damage. Unless something like the other doofus-caused damage this seems more than peculiar it was the plug. I, like another poster, don't know the engine but if caused mechanical damage to a plug the timing or a rod or somesuch sound more proximate causes than a plug. The plug may be a symptom... I swapped a rebuilt engine into an old Honda CRX years ago for not a lot of money...back then there was an abundant supply from Japan owing to a change in their emission requirements iiuc. Don't know what options would be at the moment for that one. Generally, if a vehicle is still otherwise in good shape one can still repair pretty major for less than what would spend on the replacement (unless one is extremely fortunate or disciplined in the process anyway). -- |
#14
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Speaking of broken spark plugs...
"JoeSpareBedroom" wrote:
-snip- Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. Only you can determine if it is worth it to spend that much money on that car. My mechanic has recommended that I junk my daughters 99 Grand Am a couple times. Since we know the entire history of the car, it runs fine despite the 200,000 miles on it, the body and interior are in great shape, and she likes the car, we've spent the money-- and I'm glad we have. If it was *my* mechanic telling me that about *my* car, I'd be tempted to go ahead and have it overhauled. I couldn't replace it for $3 grand. [and know exactly what is new and old on it] Jim |
#15
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Speaking of broken spark plugs...
JoeSpareBedroom wrote:
Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. A incorrect spark plug that is too long will manifest itself upon the very first revolution of the engine. Since you have a confirmed damaged plug, my guess is that you dropped a valve. If that is the case, the valve is what damaged the plug, not the other way around. -- Tony Sivori Due to spam, I'm filtering all Google Groups posters. |
#16
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Speaking of broken spark plugs...
"AZ Nomad" wrote in message
... On Tue, 8 Dec 2009 11:13:47 -0500, JoeSpareBedroom wrote: "Larry Fishel" wrote in message ... Unless one of the sparkplugs was changed just before starting it up that time, that seems unlikely. You didn't give us very much info about the problem... Was it running badly or just making noise? Can you describe the noise at all? Are you mechanically inclined enough to at least remove the spark plugs and accessory belts and run the starter? That will narrow things way down with a minimum of effort. (A lot of horrible "engine" noises turn out to be failed alternators, water pumps, etc...) Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. Whoever replaced the plugs last or perhaps the plug maker owes you an engine overhaul. Spoke to her a little while ago. She's thinking they may never have been replaced. She's checking through a pile of receipts, while complaining that our mechanic should've told her to do plugs at the recommended interval. This is one instance where one of our mechanic's best selling points may be at fault: While working on our cars, he'll point out stuff that needs to be done in the future so we can plan our budgets. For instance, if he's rotating tires, he'll say "Think 6 months for front brakes, unless you start driving a lot more than usual." BUT: He leaves it up to the customer to keep an eye on the car's service intervals and request certain things, which I like. If (and this is a big IF) plugs can fall apart due simply to age, who's at fault? The mechanic for never saying "tuneup time", or the customer, for not keeping an eye on the service schedule in the owner's manual? And why am I in the middle of all this? :-) Don't ask. |
#17
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Speaking of broken spark plugs...
On Tue, 8 Dec 2009 11:47:11 -0500, JoeSpareBedroom wrote:
"AZ Nomad" wrote in message ... On Tue, 8 Dec 2009 11:13:47 -0500, JoeSpareBedroom wrote: "Larry Fishel" wrote in message ... Unless one of the sparkplugs was changed just before starting it up that time, that seems unlikely. You didn't give us very much info about the problem... Was it running badly or just making noise? Can you describe the noise at all? Are you mechanically inclined enough to at least remove the spark plugs and accessory belts and run the starter? That will narrow things way down with a minimum of effort. (A lot of horrible "engine" noises turn out to be failed alternators, water pumps, etc...) Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. Whoever replaced the plugs last or perhaps the plug maker owes you an engine overhaul. Spoke to her a little while ago. She's thinking they may never have been replaced. She's checking through a pile of receipts, while complaining that our mechanic should've told her to do plugs at the recommended interval. This is one instance where one of our mechanic's best selling points may be at fault: While working on our cars, he'll point out stuff that needs to be done in the future so we can plan our budgets. For instance, if he's rotating tires, he'll say "Think 6 months for front brakes, unless you start driving a lot more than usual." BUT: He leaves it up to the customer to keep an eye on the car's service intervals and request certain things, which I like. If (and this is a big IF) plugs can fall apart due simply to age, who's at fault? The mechanic for never saying "tuneup time", or the customer, for not keeping an eye on the service schedule in the owner's manual? And why am I in the middle of all this? :-) Don't ask. It's a little weird with today's cars. Except for spark plugs, there really is nothing to tune up any more. Cars don't have points or carbs. With unleaded gas, spark plugs last at least 50K miles. I've replaced plugs after 50K miles that looked like they could have gone another 50K miles. |
#18
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Speaking of broken spark plugs...
JoeSpareBedroom wrote:
.... Spoke to her a little while ago. She's thinking they may never have been replaced. She's checking through a pile of receipts, while complaining that our mechanic should've told her to do plugs at the recommended interval. .... The plug itself almost certainly had nothing to do w/ it...it's just a symptom of what went wrong. Nor would have replacing them @100k or whatever was the recommended interval likely have made any difference. -- |
#19
Posted to alt.home.repair
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Speaking of broken spark plugs...
For the broken plug. Take the broken plug out, and then
start the engine for a couple seconds. It will be unbelievably noisy. But, the missing plug will allow a hole for the pieces of metal, etc, to come flying out. Don't be any where near the hole, even with safety goggles. -- Christopher A. Young Learn more about Jesus www.lds.org .. "JoeSpareBedroom" wrote in message ... Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. What a mess. |
#20
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Speaking of broken spark plugs...
On Dec 8, 10:13*am, "JoeSpareBedroom"
wrote: "Larry Fishel" wrote in message ... Unless one of the sparkplugs was changed just before starting it up that time, that seems unlikely. You didn't give us very much info about the problem... Was it running badly or just making noise? Can you describe the noise at all? Are you mechanically inclined enough to at least remove the spark plugs and accessory belts and run the starter? That will narrow things way down with a minimum of effort. (A lot of horrible "engine" noises turn out to be failed alternators, water pumps, etc...) Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. What a mess. Where was the plug broken, what part of it, did it melt, what is the plugs color, did you try a new one just to see what happens or try a compression test. So post a photo of it, you can tell alot about a cars overall running condition and age by looking at a plug. A 15 $ compression tester and a new plug will tell you alot. |
#21
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Speaking of broken spark plugs...
AZ Nomad wrote in
: On Tue, 8 Dec 2009 10:16:08 -0500, JoeSpareBedroom wrote: My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. Unless you're primarily interested in adding a room, or perhaps replacing a toilet, this doesn't belong in a.h.r., even if you live in the car. Try rec.autos.tech. Joe: Next time post cool devastation pics and you won't get your ass reamed :-) If the mechanic is competant, he can find out if the problem is major without doing any dissassembly at all. There's probably no way he can damage it worse than has already occured and the problem might just be the bearings of an accessory. If the mechanic is unwilling to start the car then find another. It is insane to write off the car without even starting it again and listening for where the noise is coming from. |
#22
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Speaking of broken spark plugs...
Your mechanic sounds a bit like me. Fix it when it breaks.
You're in the middle cause you'e a caring parent? -- Christopher A. Young Learn more about Jesus www.lds.org .. "JoeSpareBedroom" wrote in message ... Spoke to her a little while ago. She's thinking they may never have been replaced. She's checking through a pile of receipts, while complaining that our mechanic should've told her to do plugs at the recommended interval. This is one instance where one of our mechanic's best selling points may be at fault: While working on our cars, he'll point out stuff that needs to be done in the future so we can plan our budgets. For instance, if he's rotating tires, he'll say "Think 6 months for front brakes, unless you start driving a lot more than usual." BUT: He leaves it up to the customer to keep an eye on the car's service intervals and request certain things, which I like. If (and this is a big IF) plugs can fall apart due simply to age, who's at fault? The mechanic for never saying "tuneup time", or the customer, for not keeping an eye on the service schedule in the owner's manual? And why am I in the middle of all this? :-) Don't ask. |
#23
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Speaking of broken spark plugs...
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#24
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Speaking of broken spark plugs...
That's basically the reason. She's low on cash, and doesn't understand why I
give a damn. The day after this car mess began, there was a death on her side of the family, so she's overwhelmed. The mechanic really is quite remarkable. Over the years, he's talked me OUT of doing certain things to old cars. He's very good at presenting the mechanical facts, but at some point, that aspect runs out of steam and it comes down to financial decisions which only the owner can make. "Stormin Mormon" wrote in message ... Your mechanic sounds a bit like me. Fix it when it breaks. You're in the middle cause you'e a caring parent? -- Christopher A. Young Learn more about Jesus www.lds.org . "JoeSpareBedroom" wrote in message ... Spoke to her a little while ago. She's thinking they may never have been replaced. She's checking through a pile of receipts, while complaining that our mechanic should've told her to do plugs at the recommended interval. This is one instance where one of our mechanic's best selling points may be at fault: While working on our cars, he'll point out stuff that needs to be done in the future so we can plan our budgets. For instance, if he's rotating tires, he'll say "Think 6 months for front brakes, unless you start driving a lot more than usual." BUT: He leaves it up to the customer to keep an eye on the car's service intervals and request certain things, which I like. If (and this is a big IF) plugs can fall apart due simply to age, who's at fault? The mechanic for never saying "tuneup time", or the customer, for not keeping an eye on the service schedule in the owner's manual? And why am I in the middle of all this? :-) Don't ask. |
#25
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Speaking of broken spark plugs...
On Tue, 08 Dec 2009 11:28:52 -0600, Red Green wrote:
AZ Nomad wrote in : On Tue, 8 Dec 2009 10:16:08 -0500, JoeSpareBedroom wrote: My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. Unless you're primarily interested in adding a room, or perhaps replacing a toilet, this doesn't belong in a.h.r., even if you live in the car. Try rec.autos.tech. Joe: Next time post cool devastation pics and you won't get your ass reamed :-) Mmmm, engine devastation... :-) Fond memories here of an old friend buying a vehicle once where it was obvious that the engine was about to go (it was dirt-cheap, and he had an engine already lined up for us to drop in). Sounded like a clothes dryer full of bricks when it ran. It was about 5 miles to the house, so the decision to risk driving it back was made. He kept the revs low, tried not to stress it too much, and amazingly it got to about 50ft from the house when the engine went bang - a *loud* bang, too. Managed to coast it right up into the driveway... and then we had to go back along the road and clean up the trail of engine parts. Near as we could tell from the wreckage it was an oilway to a main bearing that had originally blocked; the loud knocking sound it was making (which was the point when the previous owners parked it up on their driveway) was the crank bouncing around after the bearing shells had started to disintegrate due to lack of oil. When it let go completely, the (alloy) sump was demolished when one of the big ends exited the bottom of the engine, whilst the corresponding piston went upwards and high speed and completely trashed the head. A picture's worth a thousand words, and I really wish I'd taken photos at the time :-( cheers Jules |
#26
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Speaking of broken spark plugs...
"Jules" wrote in message
news On Tue, 08 Dec 2009 11:28:52 -0600, Red Green wrote: AZ Nomad wrote in : On Tue, 8 Dec 2009 10:16:08 -0500, JoeSpareBedroom wrote: My ex's 1999 Subaru Legacy (4 cyl, 126K miles) began making some nasty noises in the motor a week ago. She drove it 2 blocks and it's been sitting in the driveway ever since, while she ponders what to do. Except for warranty work, It's been maintained by one very competent mechanic throughout its life. He's hesitant to mess with it because he says that evaluation could require major engine disassembly which could cost so much that no sane owner would want to even go that far just to find out that the car is toast. Car is in otherwise excellent condition. Unless you're primarily interested in adding a room, or perhaps replacing a toilet, this doesn't belong in a.h.r., even if you live in the car. Try rec.autos.tech. Joe: Next time post cool devastation pics and you won't get your ass reamed :-) Mmmm, engine devastation... :-) Fond memories here of an old friend buying a vehicle once where it was obvious that the engine was about to go (it was dirt-cheap, and he had an engine already lined up for us to drop in). Sounded like a clothes dryer full of bricks when it ran. It was about 5 miles to the house, so the decision to risk driving it back was made. He kept the revs low, tried not to stress it too much, and amazingly it got to about 50ft from the house when the engine went bang - a *loud* bang, too. Managed to coast it right up into the driveway... and then we had to go back along the road and clean up the trail of engine parts. Near as we could tell from the wreckage it was an oilway to a main bearing that had originally blocked; the loud knocking sound it was making (which was the point when the previous owners parked it up on their driveway) was the crank bouncing around after the bearing shells had started to disintegrate due to lack of oil. When it let go completely, the (alloy) sump was demolished when one of the big ends exited the bottom of the engine, whilst the corresponding piston went upwards and high speed and completely trashed the head. A picture's worth a thousand words, and I really wish I'd taken photos at the time :-( cheers Jules I see a reality show in the making. :-) |
#27
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Speaking of broken spark plugs...
dpb wrote:
JoeSpareBedroom wrote: ... Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. What a mess. A plug "broken"??? How? What broke? In 50 years w/ all personal automobiles and light trucks plus tractors and other farm equipment BD (before diesel) I've never seen a broken plug other than breaking the insulation or somesuch external damage. Well I have.... A few years ago my wife's 100K plus miles Oldsmobile had a tune up including new plugs and plug leads. A few weeks later a noticable miss developed and my mechanic found that one of the plugs he'd just replaced had lost it's ground electrode. He replaced the plug "under warranty" and her car seemed to be running OK after that. About 8 months later her car failed the emissions portion of our annual state inspection because the engine computer was reporting uneven firing. A compression test showed weak compression in the same cylinder which had its spark plug lose its electrode. The upshot was that a valve job was needed to make things right again. The exhaust valve in the weak cylinder and its seat had a "groove" in them which looked like it might have been caused by slamming down on that spark plug electrode which had fallen off. There was no way of "proving" the valve problem was the direct result of that failed spark plug, and because I trust and want to keep the great relationship I have with my mechanic, I just paid the bill without trying to create a ruckus over it. I'm still fondly remembering the olde days when I could fix anything on our cars with my own tools and knowledge. Nowadays it seems like I'm doing repairs with my checkbook more often than my tools. G Jeff -- Jeffry Wisnia (W1BSV + Brass Rat '57 EE) The speed of light is 1.8*10e12 furlongs per fortnight. Unless something like the other doofus-caused damage this seems more than peculiar it was the plug. I, like another poster, don't know the engine but if caused mechanical damage to a plug the timing or a rod or somesuch sound more proximate causes than a plug. The plug may be a symptom... I swapped a rebuilt engine into an old Honda CRX years ago for not a lot of money...back then there was an abundant supply from Japan owing to a change in their emission requirements iiuc. Don't know what options would be at the moment for that one. Generally, if a vehicle is still otherwise in good shape one can still repair pretty major for less than what would spend on the replacement (unless one is extremely fortunate or disciplined in the process anyway). -- |
#28
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Speaking of broken spark plugs...
On Tue, 08 Dec 2009 10:56:37 -0600, AZ Nomad wrote:
It's a little weird with today's cars. Except for spark plugs, there really is nothing to tune up any more. Cars don't have points or carbs. With unleaded gas, spark plugs last at least 50K miles. I've replaced plugs after 50K miles that looked like they could have gone another 50K miles. There's still brakes and timing belts and clutches and coolant pumps and other stuff to worry about once the mileage gets high enough, though - and I suspect lots of folk out there believe that if it's a modern vehicle it therefore needs no care at all... |
#29
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Speaking of broken spark plugs...
On Tue, 08 Dec 2009 10:28:30 -0600, dpb wrote:
JoeSpareBedroom wrote: ... Update: She had a nearby mechanic (not the usual one) take a look at the car. He pulled the plugs and in fact, one WAS broken. That's as far as it went. He said "No way to determine damage without major teardown - $1500 or so." Our usual mechanic says "More like $2500 - not worth it for a car with book value of $3000-ish". The latter guy is probably being cautious and preparing her for worst case scenario. What a mess. A plug "broken"??? How? What broke? In 50 years w/ all personal automobiles and light trucks plus tractors and other farm equipment BD (before diesel) I've never seen a broken plug other than breaking the insulation or somesuch external damage. I've seen them break due to overheating, but I don't think I've ever seen one that's "just broken" either. If it's outright smashed and there are no issues with the cooling system then *something* had to have hit it... cheers Jules |
#30
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Speaking of broken spark plugs...
jeff_wisnia wrote:
dpb wrote: .... A plug "broken"??? How? What broke? In 50 years w/ all personal automobiles and light trucks plus tractors and other farm equipment BD (before diesel) I've never seen a broken plug other than breaking the insulation or somesuch external damage. Well I have.... A few years ago my wife's 100K plus miles Oldsmobile had a tune up including new plugs and plug leads. A few weeks later a noticable miss developed and my mechanic found that one of the plugs he'd just replaced had lost it's ground electrode. He replaced the plug "under warranty" and her car seemed to be running OK after that. .... Stuff _can_ happen but it surely isn't common. If the electrode was gone when the plug came out, it likely was laying on top of the cylinder. They should've gotten it out then rather than just sticking another plug in and going on... -- |
#31
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Speaking of broken spark plugs...
On Tue, 8 Dec 2009 09:28:30 -0800 (PST), ransley
wrote: Where was the plug broken, what part of it, did it melt, what is the plugs color, did you try a new one just to see what happens or try a compression test. So post a photo of it, you can tell alot about a cars overall running condition and age by looking at a plug. A 15 $ compression tester and a new plug will tell you alot. Nice little chart he http://www.verrill.com/moto/sellingg...colorchart.htm |
#32
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Speaking of broken spark plugs...
OK - so now that we've established that there's a broken spark plug
(assuming the mechanic's telling the truth), what are the various levels of horror which could result from further diagnosis? Valve wrecked? Valve seat(s) wrecked? Piston damaged? Top? Sides? Don't ask, it's too scary? |
#33
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Speaking of broken spark plugs...
On Dec 8, 2:42*pm, "JoeSpareBedroom"
wrote: OK - so now that we've established that there's a broken spark plug (assuming the mechanic's telling the truth), what are the various levels of horror which could result from further diagnosis? Worst case is something like: The timing belt/chain is worn and skipped a tooth (just fixing this could be a few hundred). This caused the pistons to hit the valves, damaging the valves, a spark plug, head, pistons and possibly even rods. Broken bits of valve and/or spark plug gouged the cylinder walls. Or, you could just have a bit of broken spark plug bounding around in there and running it for a few seconds with that plug out will clear it out. Somewhere in between those two... |
#34
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Speaking of broken spark plugs...
On Tue, 8 Dec 2009 14:42:26 -0500, "JoeSpareBedroom"
wrote: OK - so now that we've established that there's a broken spark plug (assuming the mechanic's telling the truth), what are the various levels of horror which could result from further diagnosis? Valve wrecked? Valve seat(s) wrecked? Piston damaged? Top? Sides? Don't ask, it's too scary? All that, plus scarred cylinder wall , malted rings, yawn. Start with a compression test. Even check all the cylinders for good compression. |
#35
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Speaking of broken spark plugs...
Oren wrote in news48th599bmqtco8fkdbsharahk42tv1t5h@
4ax.com: On Tue, 8 Dec 2009 09:28:30 -0800 (PST), ransley wrote: Where was the plug broken, what part of it, did it melt, what is the plugs color, did you try a new one just to see what happens or try a compression test. So post a photo of it, you can tell alot about a cars overall running condition and age by looking at a plug. A 15 $ compression tester and a new plug will tell you alot. Nice little chart he http://www.verrill.com/moto/sellingg...colorchart.htm Ms. April is pretty hot. |
#36
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Speaking of broken spark plugs...
On Tue, 08 Dec 2009 14:22:36 -0600, Red Green
wrote: Oren wrote in news48th599bmqtco8fkdbsharahk42tv1t5h@ 4ax.com: On Tue, 8 Dec 2009 09:28:30 -0800 (PST), ransley wrote: Where was the plug broken, what part of it, did it melt, what is the plugs color, did you try a new one just to see what happens or try a compression test. So post a photo of it, you can tell alot about a cars overall running condition and age by looking at a plug. A 15 $ compression tester and a new plug will tell you alot. Nice little chart he http://www.verrill.com/moto/sellingg...colorchart.htm Ms. April is pretty hot. And Ms. June |
#37
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Speaking of broken spark plugs...
Oren wrote in news:nldth5l9nipk1s8b3r2lld962rult4l2aq@
4ax.com: On Tue, 08 Dec 2009 14:22:36 -0600, Red Green wrote: Oren wrote in news48th599bmqtco8fkdbsharahk42tv1t5h@ 4ax.com: On Tue, 8 Dec 2009 09:28:30 -0800 (PST), ransley wrote: Where was the plug broken, what part of it, did it melt, what is the plugs color, did you try a new one just to see what happens or try a compression test. So post a photo of it, you can tell alot about a cars overall running condition and age by looking at a plug. A 15 $ compression tester and a new plug will tell you alot. Nice little chart he http://www.verrill.com/moto/sellingg...colorchart.htm Ms. April is pretty hot. And Ms. June Couple of real skanks in there too. |
#38
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Speaking of broken spark plugs...
On Tue, 8 Dec 2009 12:04:40 -0800 (PST), Larry Fishel
wrote: On Dec 8, 2:42*pm, "JoeSpareBedroom" wrote: OK - so now that we've established that there's a broken spark plug (assuming the mechanic's telling the truth), what are the various levels of horror which could result from further diagnosis? Worst case is something like: The timing belt/chain is worn and skipped a tooth (just fixing this could be a few hundred). This caused the pistons to hit the valves, damaging the valves, a spark plug, head, pistons and possibly even rods. Broken bits of valve and/or spark plug gouged the cylinder walls. How would slipped timing cause the piston to hit anything? Never heard of such a thing. |
#39
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Speaking of broken spark plugs...
Oren wrote:
On Tue, 8 Dec 2009 12:04:40 -0800 (PST), Larry Fishel wrote: On Dec 8, 2:42 pm, "JoeSpareBedroom" wrote: OK - so now that we've established that there's a broken spark plug (assuming the mechanic's telling the truth), what are the various levels of horror which could result from further diagnosis? Worst case is something like: The timing belt/chain is worn and skipped a tooth (just fixing this could be a few hundred). This caused the pistons to hit the valves, damaging the valves, a spark plug, head, pistons and possibly even rods. Broken bits of valve and/or spark plug gouged the cylinder walls. How would slipped timing cause the piston to hit anything? Never heard of such a thing. Just consider basic mechanical engine timing. If the engine is an interference design (common on many higher performance and import vehicles) the pistons can definitely collide with the valves if basic mechanical timing is lost (eg, timing belt stretches and jumps a tooth). |
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