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
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