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post #1 of (permalink) Old 12-30-1999, 07:46 AM
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Dumb valve cover gasket question

Stupid question, but I honestly don't know. One of my valve covers on my 304 is leaking. I want to replace it this weekend. My question is how? Do I buy a gasket and just lay it down and bolt the cover back on? do I buy a gasket AND use RTV? or do I just use RTV? Any help you can give would be greatly appreciated. Thanks!

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post #2 of (permalink) Old 12-30-1999, 07:58 AM
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Re: gasket question

I have used a gasket along with high temp RTV to insure a good seal.

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post #3 of (permalink) Old 12-30-1999, 08:02 AM
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Re: Dumb valve cover gasket question

when I replaced the one on my 258 I used a gasket and some silicone. I put the silicone on the valve cover only (someone told me that you may never get it off if you put it on the block as well) let it harden for a couple minutes then placed the gasket on. worked well for me, hope this helps.

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post #4 of (permalink) Old 12-30-1999, 09:49 AM
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Re: Dumb valve cover gasket question

A little bit of RTV will work along with the gasket. Personally, I always prefer to use a dedicated gasket sealer. One that I have had luck with is Permatex Hi-Tack in the aerosol can. RTV does work, but you can put too much on and oil does eventually break down the seal between the metal and the RTV. One other thing, don't torque down the bolts too much. You can squeeze that gasket out very easily by over-tightening it.

post #5 of (permalink) Old 12-31-1999, 12:27 AM
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Re: Dumb valve cover gasket question

The best RTV I've used for valve covers (in addition to a gasket) is Permatex Ultra Blue. Only put it on the valve cover side of the gasket, then lay the cover/gasket on a flat surface (garage floor on some newspaper) for a few minutes to let it tack up. Then bolt it on...not too tight. This has stood up well to heat and oil, and I think they "Guarantee" it not to leak. 'Course I don't know how you would ever collect on that, but I've had really good results with it. My $.02

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post #6 of (permalink) Old 12-31-1999, 04:15 PM
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Re: Dumb valve cover gasket question

Goo on the valve cover side, wheel bearing grease on the head side, that way it seals, and can be removed the next time.

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post #7 of (permalink) Old 12-31-1999, 04:30 PM
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Re: Dumb valve cover gasket question

Being an auto tech., I do quite a few valve covers and many other gaskets daily. My favorite find is called THE RIGHT STUFF. Permatex makes it, and it seems really thick, but let me tell you, I've NEVER had anything come back leaking after using this in conjunction with the gasket(s). With this stuff, you don't have to allow it to set up as with other rtv, and it stays where you put it...just remember, a little goes a L O N G way!!...Mark

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post #8 of (permalink) Old 12-31-1999, 06:34 PM
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Re: Dumb valve cover gasket question

Mark is absolutely right! Although "The Right Stuff" is more expensive, (about $12 per can) it works better than any other sealant I have tried. I have used it doing my oilpan seal, valve cover seals, diff seals, and thermostat seal. I only used about a 1/8" bead all the way around and NONE of them has leaked what-so-ever *and* I have about a half can of it left!

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post #9 of (permalink) Old 01-02-2000, 08:57 PM
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Re: Dumb valve cover gasket question

Working as a Mechanic. I have used " The Right Stuff " and love it. I have never had anything leak when I use this stuff. I have even used it on Diff Covers. And Have had NO problems. I love that stuff!



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