3.8 head inlet brass plugs

[lyons]

Head just back from the machine shop and need to replace the 2 large threaded brass plugs on the inlet side that were removed as part of the process.

This was not asked for but I assume that it would be better to seal the threads, so what if anything is recommended ?

Were they originally sealed as they appear clean ?


Thanks

[Mich7920]

Hi,

To seal it's HYLOMAR BLUE.
You'll use it also for oil, gazoline, water, air.

Mich

[lyons]

Will Hylomar Blue be able to withstand the very high temperature on the cylinder head, bearing in mind these plugs need to be watertight.

Thanks

[Mich7920]

Look at Hydormat web
Operating temp -50/ +250°C
Sorry, I really don't know if the cylinder head goes up to 250°C
MIch

[andrewh]

have a look at Wellseal. Developed by Rolls Royce for use on the Merlin. I use it on jobs like this and have never had an issue. But again, check out the website for specifications

[lyons]

Thanks all.

Will look at trying Wellseal. It looks like good stuff for jobs like this.