The Dark Side: V8, V6 & 4 Cylinder Engine Conversions and related radical modifications (brakes, transmission, suspension, drivetrain) for MGB, MGA, Midget and all other MG models. Purists beware!
I going over my used 3.1 preparing for installation (new gaskets, etc.) When installing new freeze plugs is it a good idea to use some type of sealant? Obviously, I don't want any leaks. I was careful to not score the block when removing the old ones. Thanks for any help.
I always use a sealent when installing freeze plugs.
I usually use silcone gaster sealer, because I hve it one hand.
Steve
Terry,
Short answer is YES use a sealant.
Permatex 2 works well and should be readily available in the US but I am inclined to avoid anything with silicon in it.
Wipe the hole with some form of solvent to remove any traces of old sealant after cleaning with sand paper or a scraper.
You can buy specifically designed plug tools but any socket or drift which fits the rim of the plug will also do.
Impacting the plug in the dish can deform the edges enough to cause leaks if you are not careful.
With all plugs they are fitted in the cup out or hold water position and the edge should be flush with the block in the final location.
This is especially important on the plug behind the camshaft bearing at the flywheel end. There are cases where the plug was driven home too deep which pushed the camshaft forward in the block and hastened the wear on the engine.
Good luck ,
Pete.