Gasket question

Darwindo · Dec 14, 2012

When replacing gaskets, like valve cover, oil pan and water jacket cover, etc. do they go on dry or should they have some sort of sealant applied to them prior to instalation?

old · Dec 14, 2012

On most of those I use a light and note the term light coat of silicone so as to hold the gasket in place to make it easy to install the part. The biggest problem with people and silicone is they use way to much so in turn you get that bit that ends up pushing out and then getting into things

steve alderman · Dec 14, 2012

I always use gasket maker on head gaskets on the block side and head side the one time I didnt on an A and it bite me in the rear month later leeking

rustred · Dec 14, 2012

i use permatex high tack gskt. sealer. thats what its for... to hold the gsk. in place and seal the mating surfaces. and it dont harden. just plain good stuff.
i just despise silicone on a new gskt. only thing that stuff is good for is for sticking signs on walls and doors. must say though it sure worked good on the chev valve covers instead of cork gaskts. some time could not hardy get the cover off.

John G. Hasler · Dec 14, 2012

I apply a _light_ coat of silicone to the casting side of the gasket, glue it to the casting with that, apply a _light_ coat to the exposed side of the gasket, and then allow both to dry thoroughly before installing the cover. If the mating surface of the cover is clean and smooth you will get a good seal and yet be able to remove the cover without damaging the gasket.

MisterT · Dec 14, 2012

(quoted from post at 16:26:16 12/14/12) When replacing gaskets, like valve cover, oil pan and water jacket cover, etc. do they go on dry or should they have some sort of sealant applied to them prior to instalation?

I like to use Copper Coat, or something similar. I use it only on the side of the gasket that fits against the oil pan, valve cover, etc. That way I can remove the oil pan at a later date if needed and the gasket will not be damaged. I can use it again.

The main purpose of gasket cement is to hold the gasket in place while you install the pan, cover, etc. If you need to depend on the sealer to help seal up the gasket and stop the drips, then there are other issues which need to be addressed.

F-Dean · Dec 14, 2012

Coat with grease. That way when you have to take the part off to install the part you forgot to install, you will not ruin the gasket.

Dachshund · Dec 15, 2012

The silicone RTV cr^p needs to be UN-invented. In addition to holding the gasket material in place for assembly - gasket sealant is there to fill any voids in the gasket or the surface of the part. Silicone - even in very small quantities - is worthless for either one.

Darwindo · Dec 15, 2012

That is very funny Dean. Have you been looking over my shoulder?

sflem849 · Dec 15, 2012

(quoted from post at 18:25:33 12/14/12) Coat with grease. That way when you have to take the part off to install the part you forgot to install, you will not ruin the gasket.

That is all I use 9 times out if ten. Head gaskets get copper coat. I have used some sealers in the past i have critical applications.

Hey Old Man! · Dec 22, 2012

I vote for the grease. That is all I used when I did a complete rebuild of my A trans/diff. Not a single leak , easy to use and alway available. This was what all the old-timers used.

Gasket question

Darwindo

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old

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steve alderman

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rustred

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John G. Hasler

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MisterT

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F-Dean

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Dachshund

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Darwindo

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sflem849

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Hey Old Man!

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