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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Diesel engines--valve adjustments
Several days ago I posted a query about what to look for when buying a boat
with a diesel engine and got lots of useful advice. When looking at the boat, the owner said "I just had the valves adjusted" I thought "huh? automotive engines have had hydraluic lifters for about 50 years." The salesman told me that he used to be a diesel mechanic and verified that the valves had been adjusted. I'm not that familiar with marine engines but wonder why a Hino diesel would have to have adjustible valves? Engineman1 |
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Diesel engines--valve adjustments
Universal, Perkins, Yanmar and Volvo owners manuals all have sections on
adjusting the valves. All have slightly different periods for checking the adjustment. Just saying that the valves have been adjusted does not mean much. Knowing how much adjustment was required and how many hours were on the engine sense the previous adjustment will give you an indication of wear. Yanmar recommends checking valve adjustment every 600 hours. More often if any significant adjustment is required. Have you found the maintenance log yet? Hinos are not very popular as marine engines here in the US. As with most light marine diesels they are derated maranized truck engines but to my knowlege Hino does not distribute the marine parts in the US. Call a local Hino truck dealer and ask about parts availability. Primarily those in the raw water circuit. (Water pump, empellers and exhaust injection elbows particularly) Engineman1 wrote: Several days ago I posted a query about what to look for when buying a boat with a diesel engine and got lots of useful advice. When looking at the boat, the owner said "I just had the valves adjusted" I thought "huh? automotive engines have had hydraluic lifters for about 50 years." The salesman told me that he used to be a diesel mechanic and verified that the valves had been adjusted. I'm not that familiar with marine engines but wonder why a Hino diesel would have to have adjustible valves? Engineman1 -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
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Diesel engines--valve adjustments
In article ,
Engineman1 wrote: Several days ago I posted a query about what to look for when buying a boat with a diesel engine and got lots of useful advice. When looking at the boat, the owner said "I just had the valves adjusted" I thought "huh? automotive engines have had hydraluic lifters for about 50 years." The salesman told me that he used to be a diesel mechanic and verified that the valves had been adjusted. I'm not that familiar with marine engines but wonder why a Hino diesel would have to have adjustible valves? Engineman1 It is possible... BMW didn't start using hydraulic lash adjusters until the '90s. Before that is was all solid lifters and a valve adjust every 15k. -- Joe -- Joseph M. Krzeszewski Mechanical Engineering and stuff Jack of All Trades, Master of None... Yet |
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Diesel engines--valve adjustments
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Diesel engines--valve adjustments
Subject: Diesel engines--valve adjustments
From: (Engineman1) Date: 25/07/03 08:17 GMT Daylight Time Message-id: Several days ago I posted a query about what to look for when buying a boat with a diesel engine and got lots of useful advice. When looking at the boat, the owner said "I just had the valves adjusted" I thought "huh? automotive engines have had hydraluic lifters for about 50 years." The salesman told me that he used to be a diesel mechanic and verified that the valves had been adjusted. I'm not that familiar with marine engines but wonder why a Hino diesel would have to have adjustible valves? Engineman1 To achieve compression ratios of the order of 20:1 you end up with very little clearance between pistons and valves in a diesel engine. Any fault with a hydraulic lifter such as "pumping up" would wipe the valves out in short order. That's not to say it's a good thing to happen in a petrol engine but usually there's a few mm of clearance to provide a safety margin even in an "interference" engine. On many 2v per cylinder petrol engines you don't even get valve/piston contact if the cam belt breaks. So most diesel engines have shimmed valve lash. Given the lower operating rpm this isn't much of a maintenance issue as valve wear at low rpm is fairly limited and the valves stay in adjustment for very high mileages. Dave Baker - Puma Race Engines (www.pumaracing.co.uk) "How's life Norm?" "Not for the squeamish, Coach" (Cheers, 1982) |
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Diesel engines--valve adjustments
clare wrote:
On Sat, 26 Jul 2003 06:22:18 GMT, Carl Byrns wrote: Hino parts may be difficult to get in some places, but Hino is Toyota, so the quality is there. I'm not saying you're wrong, but our Hino was built in China and the quality isn't there. Maybe Toyota sells trucks to Hino, who then relabels them? I live in the industrial Northeast and the parts availabilty is awful- the truck is frequently laid up for months at a time waiting for basic items like brake shoes. -Carl |
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Diesel engines--valve adjustments
On Sun, 27 Jul 2003 19:41:24 GMT, Carl Byrns
wrote: clare wrote: On Sat, 26 Jul 2003 06:22:18 GMT, Carl Byrns wrote: Hino parts may be difficult to get in some places, but Hino is Toyota, so the quality is there. I'm not saying you're wrong, but our Hino was built in China and the quality isn't there. Maybe Toyota sells trucks to Hino, who then relabels them? I live in the industrial Northeast and the parts availabilty is awful- the truck is frequently laid up for months at a time waiting for basic items like brake shoes. -Carl The Hino plant in Ngoya, I believe, was owned by Toyota and the 40 , 50, and 60 series land cruisers were built there. Daihatsu is/was also a Toyota company. That said, Corollas are built next door to me in Cambridge Ontario, so were the Solaras, with the convertible conversions done in Kitchener by American Sunroof. We will soon have Lexus SUVs coming off the line here - so just because it is Toyota no longer means Japanese. Same with Honda, down the road in Alliston, and Suzuki at the CAMI plant in Ingersol - all within about 70 miles. March 10, 2000 news release: Tokyo--TOYOTA MOTOR CORPORATION (TMC) announced today its plans to purchase shares to be issued and allotted to TMC by Hino Motors, Ltd. (Hino), with which TMC has a business alliance. In light of intensifying competition on a global scale, TMC and Hino have decided that by strengthening ties and by bolstering the Toyota Group's truck business, the two companies can enhance their further growth. Following the stock purchase, TMC's stake in Hino will rise from 20.1% (74,424,000 shares held) to 33.8% (151,124,000 shares). |
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Diesel engines--valve adjustments
On Sun, 27 Jul 2003 19:41:24 GMT, Carl Byrns
wrote: clare wrote: On Sat, 26 Jul 2003 06:22:18 GMT, Carl Byrns wrote: Hino parts may be difficult to get in some places, but Hino is Toyota, so the quality is there. I'm not saying you're wrong, but our Hino was built in China and the quality isn't there. Maybe Toyota sells trucks to Hino, who then relabels them? I live in the industrial Northeast and the parts availabilty is awful- the truck is frequently laid up for months at a time waiting for basic items like brake shoes. -Carl Japan's Hino Motors to expand US truck operations Thursday, 29-May-2003 5:20AM PDT Story from AFP Copyright 2003 by Agence France-Presse (via ClariNet) "Hino will keep an eye on the possibility of building a new factory to make truck engines and bodies in China," he said. In June last year, Hino announced it would begin producing trucks in the United States in October 2004 as the domestic market is shrinking rapidly. So somehow I doubt your Hino was built in China. There are chinese built trucks, similar to the Hino - can't remember the name (had them in Zambia, thanks to the ZamTan Railroad )in the early seventies, and they WERE junk. A knockoff of the Austin Champ and a 1947 International. |
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Diesel engines--valve adjustments
clare wrote:
On Sun, 27 Jul 2003 19:41:24 GMT, Carl Byrns wrote: clare wrote: On Sat, 26 Jul 2003 06:22:18 GMT, Carl Byrns wrote: Hino parts may be difficult to get in some places, but Hino is Toyota, so the quality is there. I'm not saying you're wrong, but our Hino was built in China and the quality isn't there. Maybe Toyota sells trucks to Hino, who then relabels them? I live in the industrial Northeast and the parts availabilty is awful- the truck is frequently laid up for months at a time waiting for basic items like brake shoes. -Carl Japan's Hino Motors to expand US truck operations Thursday, 29-May-2003 5:20AM PDT Story from AFP Copyright 2003 by Agence France-Presse (via ClariNet) "Hino will keep an eye on the possibility of building a new factory to make truck engines and bodies in China," he said. In June last year, Hino announced it would begin producing trucks in the United States in October 2004 as the domestic market is shrinking rapidly. So somehow I doubt your Hino was built in China. There are chinese built trucks, similar to the Hino - can't remember the name (had them in Zambia, thanks to the ZamTan Railroad )in the early seventies, and they WERE junk. A knockoff of the Austin Champ and a 1947 International. I think we're defining truck differently. Our Hino is an industrial flatbed/rollback, not a SUV or light pickup. The manufacturer's label (on the cab)says it's made in China. Of course, that might mean just the cab. It's at a different branch right now, but if it ever makes it to my office, I'll pull the VIN and see what that says. -Carl |
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Diesel engines--valve adjustments
Years ago I wanted to change a Chrysler engine that I used as a work engine
from hydraulic to solid lifters and was told I would have to change the cam shaft too. They said it had to be ground different. Just how are they ground different? clare @ snyder.on .ca wrote in message ... On Sat, 26 Jul 2003 06:22:18 GMT, Carl Byrns wrote: On 25 Jul 2003 07:17:10 GMT, (Engineman1) wrote: Several days ago I posted a query about what to look for when buying a boat with a diesel engine and got lots of useful advice. When looking at the boat, the owner said "I just had the valves adjusted" I thought "huh? automotive engines have had hydraluic lifters for about 50 years." The salesman told me that he used to be a diesel mechanic and verified that the valves had been adjusted. I'm not that familiar with marine engines but wonder why a Hino diesel would have to have adjustible valves? Engineman1 Just about every industrial diesel uses solid lifters. I'd be leery of any Hino engine- we have a Hino delivery truck it takes months to get parts for it. -Carl "The man who has nothing worth dying for has nothing worth living for"- Martin Luther King, Jr. Hino parts may be difficult to get in some places, but Hino is Toyota, so the quality is there. Hydraulic lifters are used "primarily" to make an engine quiet. This is why most auto engines have them. They are also lower maintenance, but MOST industrial, marine, and truck diesels use solids. |
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Diesel engines--valve adjustments
On Thu, 31 Jul 2003 08:23:21 -0400, "_"
wrote: Years ago I wanted to change a Chrysler engine that I used as a work engine from hydraulic to solid lifters and was told I would have to change the cam shaft too. They said it had to be ground different. Just how are they ground different? The profiles are different, and on some cams the lobe is ground on a slope to promote rotation of the lifter. A hydraulic cam with solid lifters would also have a higher effective lift. clare @ snyder.on .ca wrote in message .. . On Sat, 26 Jul 2003 06:22:18 GMT, Carl Byrns wrote: On 25 Jul 2003 07:17:10 GMT, (Engineman1) wrote: Several days ago I posted a query about what to look for when buying a boat with a diesel engine and got lots of useful advice. When looking at the boat, the owner said "I just had the valves adjusted" I thought "huh? automotive engines have had hydraluic lifters for about 50 years." The salesman told me that he used to be a diesel mechanic and verified that the valves had been adjusted. I'm not that familiar with marine engines but wonder why a Hino diesel would have to have adjustible valves? Engineman1 Just about every industrial diesel uses solid lifters. I'd be leery of any Hino engine- we have a Hino delivery truck it takes months to get parts for it. -Carl "The man who has nothing worth dying for has nothing worth living for"- Martin Luther King, Jr. Hino parts may be difficult to get in some places, but Hino is Toyota, so the quality is there. Hydraulic lifters are used "primarily" to make an engine quiet. This is why most auto engines have them. They are also lower maintenance, but MOST industrial, marine, and truck diesels use solids. |
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