C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Leaky valve covers?

Old 02-19-2017, 02:22 PM
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Powerstroked89
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Default Leaky valve covers?

Getting ready to tear into this motor but this leak makes no sense.

O-ring in the fill cap is in tact, cap is nice and tight. I clean the cover, I run the car for a few minutes and when I come back is what the pic shows.

I am making sure I am ordering all the proper parts and replacing what needs to be replacing, I just don't see how the cap is leaking after starting it once. Should I just do new valve covers/cap?

Or could this be a case of a bad PCV valve? I do have oil wicking up through two intake bolts.



Last edited by Powerstroked89; 02-19-2017 at 02:23 PM.
Old 02-19-2017, 02:28 PM
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antfarmer2
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Is your pcv valve plugged?
Old 02-19-2017, 02:46 PM
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Powerstroked89
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Originally Posted by antfarmer2
Is your pcv valve plugged?
Pulled the pcv, light oil/sludge particulate. Not clogged



Should I go down to the crank or stop at the heads on my rebuild? I do have coolant in the oil

Last edited by Powerstroked89; 02-19-2017 at 02:50 PM.
Old 02-19-2017, 02:58 PM
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Originally Posted by Pushrodv8
Pulled the pcv, light oil/sludge particulate. Not clogged



Should I go down to the crank or stop at the heads on my rebuild? I do have coolant in the oil
Then you have a bad head gasket or a cracked head. How many miles on it?
Old 02-19-2017, 03:00 PM
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Originally Posted by antfarmer2
Then you have a bad head gasket or a cracked head. How many miles on it?
140,000.

rebuilt A4, I only paid $2000 so I am not too upset. Car sat because owner broke his back and it sat outside -_-

I HOPE it's just a gasket, car only needs a suspension/motor refresh.

Car always felt like it lacked power, bad compression would make sense.

Last edited by Powerstroked89; 02-19-2017 at 03:01 PM.
Old 02-19-2017, 03:08 PM
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Originally Posted by Pushrodv8
140,000.

rebuilt A4, I only paid $2000 so I am not too upset. Car sat because owner broke his back and it sat outside -_-

I HOPE it's just a gasket, car only needs a suspension/motor refresh.

Car always felt like it lacked power, bad compression would make sense.
That will be your call but will know more when you see the walls.
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Old 02-19-2017, 03:11 PM
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Originally Posted by antfarmer2
That will be your call but will know more when you see the walls.
Thank you!

So a bad pcv would explain oil on the valve covers/oil coming from under the intake manifold bolts?
Old 02-19-2017, 06:54 PM
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Originally Posted by Pushrodv8
Thank you!

So a bad pcv would explain oil on the valve covers/oil coming from under the intake manifold bolts?
Yes but I think it is comming from your cap and because of the extra pressure from you head leak.

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