LT1-LT4 Modifications 1993-97 Gen II Small Block V8

oil leaking from head gasket?

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Old 11-07-2011, 12:53 PM
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Default oil leaking from head gasket?

i dont see how its possible but thats what it looks like. theres oil above the oil filter and on the block between number 5 and 7 exhaust ports. theres also a small streem that looks like its comming from under the number 4 and 6 exhaust ports. i just replaced the head gaskets with fel pro 1074, had the heads milled, replaced valve cover gaskets, intake gaskets, checked oil pressure sensor and cant figure this out
Old 11-07-2011, 01:41 PM
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Have you felt around the back of your intake as well is just below the valve cover? I highly doubt it's leaking from the head gasket.
Old 11-07-2011, 01:55 PM
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after i did the head gasket, the intake started leaking so iv already redone that. it feels dry, so does the oil pressure sensor, the passenger side valve cover is seeping but the head is still dry and clean. i also replaced the driver side valve cover gasket since i did the heads
Old 11-07-2011, 05:26 PM
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Residuals from the intake and the seep?
Old 11-07-2011, 06:55 PM
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Did you use sealant on the front and back of intake? Head gaskets won't leak oil. Its gott be something else higher up. Pressure sensor, valve covers, intake, cracked block.....
Old 11-07-2011, 07:36 PM
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Could it be from the Oil cooler if your car has one? I had a buddy look over mine cuz of some leaks iv noticed and he told me the oil cooler dos leak some times and to just delete it out. Or like others said check higher up with ur intake and valve cover.
Old 11-07-2011, 09:16 PM
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i deleted the oil cooler. im suspecting the sensor right now
Old 11-07-2011, 09:40 PM
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It's possible. I saw it firsthand at the back of cylinder #7 on a new (not mine ) rebuild. Head torque was apparently not done correctly and I guess oil seeped through the corner bolt hole and between the head and block. Before that, I did not think it was possible, either.
Old 11-07-2011, 11:11 PM
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i used arp thread sealent on all the threads and arp lubricant on all the washers. used a brand new snap on torque wrench, with the torque sequence taken from a gm service manual. if it is the head leaking, i have no clue what to do



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