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Old 03-29-2013, 07:07 PM
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oil leak

I have a oil leak on my 1984 Chevy Silverado I am not sure if it is the valve covers or the rear seal I have oil on my bell housing on my transmission I have already replaced the valve cover gaskets once before with cork and I think I might have tightend them down too much

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Old 03-29-2013, 07:09 PM
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please help
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Old 03-29-2013, 07:32 PM
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Clean it all up. Drive it around the block a few times so it's warmed right up then get an old pair of gloves and start feeling around the back of the heads and intake.
Should be easy to find.
Rear main leak usually won't show up on the bell.
If it's the valve covers put on some better rubber type ones.
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Old 03-29-2013, 08:01 PM
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oil leak

When replacing the cork valve cover gaskets use a sealant like Indian Head Gasket Compound. Have all of the parts clean and apply the Indian Head Gasket Compound to the valve cover and let dry until tacky. Install the gasket on the valve cover and line up all the bolt holes then let set about 30 minutes. Apply the Indian Head Gasket Compound to the head and let dry until tacky. Install the valve covers and tighten bolts. Do not over tighten. You will have to use a rubber mallet to remove. Also check the back of the intake for oil leak. Check the oil sending unit if mounnted behind the intake manifold too.
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Old 03-29-2013, 08:14 PM
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check intake torque
check back of intake,thats where mine just started leaking
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Old 03-29-2013, 11:25 PM
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If it did happen to be the rear of the intake where typically they used to use that short section of gasket front and rear, I'd suggest you reseal it with this product called The Right Stuff and NO gasket. I had sealed mine lately with that product along with a Felpro intake gasket set and I had to pull it back off a while later to change out the cam. Does that "Stuff" ever hold, its very strong and yet very flexible as it took a lot to break that seal. Heres the link to the product but will warn you that it doesn't come cheap. I also used some sparingly around the coolant passage holes on both sides of the gaskets but not elsewhere as I used spray on high tack gasket sealer there. I doubt it would be used on valve covers though as it probably would hold too good so go on what has been mentioned before this post.

the Right Stuff® - Permatex

Also for a nice clean installation of the intake, after the bolts are in and torqued down, take your finger with disposable gloves on and run it along the front and rear to swipe off the excess sealer that was squeezed out as it can sure look shoddy when its sticking out messily at the front of an engine.
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