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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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[OTish]Temperature sensor thread sealant
I have a brass temperature sensor about 14mm in diameter, no 'O' ring or
shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. -- Roger Hayter |
#2
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[OTish]Temperature sensor thread sealant
In article ,
Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. No taper at the end? PTFE tape won't do any harm. I use ScotchClad thread sealer for everything that screws into my ally engine. It seals, prevents corrosion, and locks. -- *When everything's coming your way, you're in the wrong lane * Dave Plowman London SW To e-mail, change noise into sound. |
#3
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[OTish]Temperature sensor thread sealant
On 29 Oct 2020 at 14:55:34 GMT, ""Dave Plowman" News)"
wrote: In article , Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. No taper at the end? PTFE tape won't do any harm. I use ScotchClad thread sealer for everything that screws into my ally engine. It seals, prevents corrosion, and locks. Thanks. The ScotchClad seems a bit elusive, though. -- Roger Hayter |
#4
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[OTish]Temperature sensor thread sealant
On 29/10/2020 16:12, Roger Hayter wrote:
On 29 Oct 2020 at 14:55:34 GMT, ""Dave Plowman" News)" wrote: In article , Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. No taper at the end? PTFE tape won't do any harm. I use ScotchClad thread sealer for everything that screws into my ally engine. It seals, prevents corrosion, and locks. Thanks. The ScotchClad seems a bit elusive, though. If Loctite don't make something exactly designed for this, I'll eat my hat. Ooh. I don't own a hat. Hmm... https://www.loctiteproducts.com/en/p...erblue242.html I'd leave 24 hours to 'cure' on a non steel surface https://www.amazon.co.uk/Henkel-2097.../dp/B000I1RSNS -- It is dangerous to be right in matters on which the established authorities are wrong. Voltaire, The Age of Louis XIV |
#5
Posted to uk.d-i-y
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[OTish]Temperature sensor thread sealant
In article ,
Roger Hayter wrote: On 29 Oct 2020 at 14:55:34 GMT, ""Dave Plowman" News)" wrote: In article , Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. No taper at the end? PTFE tape won't do any harm. I use ScotchClad thread sealer for everything that screws into my ally engine. It seals, prevents corrosion, and locks. Thanks. The ScotchClad seems a bit elusive, though. Yup - you'll not find it in Halfords. A car body shop that deals with 3M for paint should be able to order it for you. Comes in litre tins - last one I bought about £35. But of course will do hundreds of bolts, and that tin is lasting well. It's for all the world like a clear cellulose varnish. Full name ScotchClad 776. But I'm sure there will be a tube of loctite that does much the same. -- *It IS as bad as you think, and they ARE out to get you. Dave Plowman London SW To e-mail, change noise into sound. |
#6
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[OTish]Temperature sensor thread sealant
On 29 Oct 2020 at 17:20:27 GMT, "The Natural Philosopher"
wrote: On 29/10/2020 16:12, Roger Hayter wrote: On 29 Oct 2020 at 14:55:34 GMT, ""Dave Plowman" News)" wrote: In article , Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. No taper at the end? PTFE tape won't do any harm. I use ScotchClad thread sealer for everything that screws into my ally engine. It seals, prevents corrosion, and locks. Thanks. The ScotchClad seems a bit elusive, though. If Loctite don't make something exactly designed for this, I'll eat my hat. Ooh. I don't own a hat. Hmm... https://www.loctiteproducts.com/en/p...erblue242.html I'd leave 24 hours to 'cure' on a non steel surface https://www.amazon.co.uk/Henkel-2097.../dp/B000I1RSNS That's what I tend to use on cars. Not sure how well it is rated as a sealant, but I suppose it is bound to works at least to some extent if it locks the threads. -- Roger Hayter |
#7
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[OTish]Temperature sensor thread sealant
On Thursday, 29 October 2020 at 14:37:23 UTC, Roger Hayter wrote:
I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. -- Roger Hayter Does it actually NEED sealing - ie is it going to leak coolant or does it screw into a blind pocket? I'd simply put a smear of anti sieze or a corrosion inhibiting heat sink compound on the thread if there's no leakage likely |
#8
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[OTish]Temperature sensor thread sealant
On 30 Oct 2020 at 06:56:10 GMT, "John J" wrote:
On Thursday, 29 October 2020 at 14:37:23 UTC, Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. -- Roger Hayter Does it actually NEED sealing - ie is it going to leak coolant or does it screw into a blind pocket? I'd simply put a smear of anti sieze or a corrosion inhibiting heat sink compound on the thread if there's no leakage likely It is potentially going to leak coolant. -- Roger Hayter |
#9
Posted to uk.d-i-y
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[OTish]Temperature sensor thread sealant
In article ,
John J wrote: On Thursday, 29 October 2020 at 14:37:23 UTC, Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. -- Roger Hayter Does it actually NEED sealing - ie is it going to leak coolant or does it screw into a blind pocket? I'd simply put a smear of anti sieze or a corrosion inhibiting heat sink compound on the thread if there's no leakage likely A CTS normally pokes into the coolant. -- *If a pig loses its voice, is it disgruntled? Dave Plowman London SW To e-mail, change noise into sound. |
#10
Posted to uk.d-i-y
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[OTish]Temperature sensor thread sealant
In article ,
Roger Hayter wrote: On 30 Oct 2020 at 06:56:10 GMT, "John J" wrote: On Thursday, 29 October 2020 at 14:37:23 UTC, Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. -- Roger Hayter Does it actually NEED sealing - ie is it going to leak coolant or does it screw into a blind pocket? I'd simply put a smear of anti sieze or a corrosion inhibiting heat sink compound on the thread if there's no leakage likely It is potentially going to leak coolant. I've just looked at a spare I have here for an SD1 Rover - ally head. It definitely has a taper at the end of the thread just below the hex. -- *A conclusion is the place where you got tired of thinking * Dave Plowman London SW To e-mail, change noise into sound. |
#11
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[OTish]Temperature sensor thread sealant
On 30 Oct 2020 at 10:44:56 GMT, ""Dave Plowman" News)"
wrote: In article , Roger Hayter wrote: On 30 Oct 2020 at 06:56:10 GMT, "John J" wrote: On Thursday, 29 October 2020 at 14:37:23 UTC, Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. -- Roger Hayter Does it actually NEED sealing - ie is it going to leak coolant or does it screw into a blind pocket? I'd simply put a smear of anti sieze or a corrosion inhibiting heat sink compound on the thread if there's no leakage likely It is potentially going to leak coolant. I've just looked at a spare I have here for an SD1 Rover - ally head. It definitely has a taper at the end of the thread just below the hex. Do you reckon ordinary blue (clone) Loctite is good enough? I'm not convinced taper threads should be used without sealant. -- Roger Hayter |
#12
Posted to uk.d-i-y
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[OTish]Temperature sensor thread sealant
In article ,
Roger Hayter wrote: On 30 Oct 2020 at 10:44:56 GMT, ""Dave Plowman" News)" wrote: In article , Roger Hayter wrote: On 30 Oct 2020 at 06:56:10 GMT, "John J" wrote: On Thursday, 29 October 2020 at 14:37:23 UTC, Roger Hayter wrote: I have a brass temperature sensor about 14mm in diameter, no 'O' ring or shoulder, just seals on the threads into an aluminium cylinder head. What should I use to seal it? Nothing, ptfe tape, ordinary blue loctite, plumbing thread sealing compound (a bit too permanent I would think) or something else? Glad of any advice. -- Roger Hayter Does it actually NEED sealing - ie is it going to leak coolant or does it screw into a blind pocket? I'd simply put a smear of anti sieze or a corrosion inhibiting heat sink compound on the thread if there's no leakage likely It is potentially going to leak coolant. I've just looked at a spare I have here for an SD1 Rover - ally head. It definitely has a taper at the end of the thread just below the hex. Do you reckon ordinary blue (clone) Loctite is good enough? I'm not convinced taper threads should be used without sealant. On the Rover, I've not heard anyone say you must use any sealant at all. -- *I tried to catch some fog, but I mist.* Dave Plowman London SW To e-mail, change noise into sound. |
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