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Old 02-10-2023, 03:40 PM   #1
denverslim
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replacing leaky old valve cover gaskets.

Along the lines of my earlier post, do you guys use any permatex or other stuff when you replace your old cork valve cover gaskets?
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Old 02-10-2023, 08:02 PM   #2
jayoldschool
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Re: replacing leaky old valve cover gaskets.

I clean the cover and straighten it. Clean the head. Then I glue the gasket to the cover and let it set up. Then, cover on, and don't overtighten. And I don't use cork, I use the better composite gaskets now.
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Old 02-10-2023, 08:37 PM   #3
theastronaut
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Re: replacing leaky old valve cover gaskets.

I like Permatex Aviation non hardening sealer, it's much easier to clean off than silicone
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Old 02-10-2023, 10:47 PM   #4
AcampoDave
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Re: replacing leaky old valve cover gaskets.

I'm routinely vexed with leaky perimiter bolt valvecovers. Last time I bought the extra thick cork ones and put Permatex black on both sides. Everything was clean I really did it right but they still leak a little. I believe chevy switched to the centebolt ones for good reason.
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Old 02-10-2023, 10:58 PM   #5
Getter-Done
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Re: replacing leaky old valve cover gaskets.

I will add to the Recommendations above.

https://www.ebay.com/itm/40068229235...8751550f8d6fe2

Clamps like these Help.

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Old 02-11-2023, 03:25 AM   #6
Accelo
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Re: replacing leaky old valve cover gaskets.

I agree with Getter-Done, the bolt hole spreaders are the way to go.
Sadly I have used the GM ones that are hardened and you couldn't bend them with a small hammer. I have also used the imports that I could bend, at the bolt hole, with my fingers.
I am unsure if you can even purchase the GM them any more but the least expensive spreaders are not the ones you want. At least you know how to tell the difference.
Cheers.
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Old 02-11-2023, 08:07 AM   #7
The Rocknrod
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Re: replacing leaky old valve cover gaskets.

I used 1217H Threebond and have never looked back.
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Old 02-11-2023, 11:59 AM   #8
denverslim
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Re: replacing leaky old valve cover gaskets.

Thanks fellows.

I love this site!
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Old 02-11-2023, 12:08 PM   #9
mike's1965
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Re: replacing leaky old valve cover gaskets.

I bought Summit Racing valve cover gaskets that are black rubber with some kind of metal inside, you can reuse them and don’t use any sealant.

My truck has a big block, but I’m sure they make these for small blocks and maybe 6 cylinder.

https://www.summitracing.com/parts/s...xoChI4QAvD_BwE
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