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Old 09-11-2007, 01:21 PM   #1
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Question how the heck do ya get these valve covers to seal !

ok guys, this is going on the 3rd time and final try in the year and few months ive owned this jeep to seal my valve cover. this last time, i took my time cleaning everything and gettin the gasket to seal real good to the cover. i even talked to the jeep dealership one of the times and they said they dont even use gaskets ! they sold me a tube of MOPAR SEALANT and they basicly glue the cover to the head ! i tried that with no success . the jeep dealership told me these thing are notorious for leaky valve covers. this last time, i only have one little spot that leaks, and unfortunately it leaks right down on the exhaust manifold . the areas that are cut thin around the head bolts are very, very thin and prone to leak. like i said, im gonna try this 3rd and final time, any suggestions or help will be greatly appreciated.

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Old 09-11-2007, 01:34 PM   #2
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sounds like ur valve cover may be warped

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Old 09-11-2007, 01:35 PM   #3
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Welder.


Be very careful to tighten it like you would a head, a little here, a little there and so on back and forth across the valve cover, I also like to use both the gasket and the sealant.
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Old 09-11-2007, 01:54 PM   #4
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I use sealant and the gasket too. Use the silicone on both sides of the gasket and make sure there is absolutely no oil there. Silicone will not stick to oil. I also upgraded to a cast aluminum valve cover. The POS plastic ones are prone to breaking. You do not want to overtighten the bolts. Simply get them snug and retighten a day or so later after the silicone has completely set up.
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Old 09-11-2007, 03:39 PM   #5
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ok, thats what i did not do cuz of the mess i had to clean up after the mopar sealant. i DID NOT put sealant on the gasket to the head part. ill buy a new gasket and do it this third time. wish me luck guys and thanks for your input.
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Old 09-11-2007, 05:57 PM   #6
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Long story short answer.
When I first bought my YJ used about 14 years ago (and it was bone stock) I got a very short 30 day warrenty. I took it back several times and they replaced everything but the valve cover gasket including the rear main.
I then found the leak at the valve cover and tried it once myself with no luck. Short answer I took it to a local auto shop (long before Absolute Offroad) as I figured if I paid them once and it still leaked I could take it back for free. They did a god job it never leaked again.

It worked out well for me in the long run as I never had to screw with the rear main as it was brand new
Jim
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Old 09-29-2007, 01:02 AM   #7
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The only cure for my 2.5L leaky valve cover is planning for a V8 conversion. Then I can have TWO leaky valve covers!!
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Old 09-29-2007, 02:05 AM   #8
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have the valve cover plane at a machine shop. i wouldnt use any sealant on a v.c gasket, but maybe its a jeep thing idk

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