[Roger Hayter[_2_]]

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

[Dave Plowman (News)]

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.

[Roger Hayter[_2_]]

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

[The Natural Philosopher[_2_]]

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

--
€œIt is dangerous to be right in matters on which the established
authorities are wrong.€�

ۥ Voltaire, The Age of Louis XIV

[Dave Plowman (News)]

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.

[Roger Hayter[_2_]]

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

[John J[_2_]]

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

[Roger Hayter[_2_]]

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

[Dave Plowman (News)]

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.

[Dave Plowman (News)]

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.

[Roger Hayter[_2_]]

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

[Dave Plowman (News)]

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.