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Old 03-01-2006, 02:35 PM
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RobM RobM is offline
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On my 88GW I have a leak somewhere near the oil filler, both the valleys on the left and right of where the upper radiator hose comes in. The valve cover gaskets are new and the oil cap is new.

any ideas?

thanks
Rob
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Old 03-01-2006, 02:45 PM
illegalFSJ illegalFSJ is offline
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You can remove the bolts in those "valleys" and smear some sealent on them, then re-install and torque to spec. If the oil re-appears, then you'd know it wasn't coming from the bolts. This has worked for me on several GM 350 engines.
If the oil re-appears, I'd take a good hard look at the valve cover gaskets again. Just because they're new dosen't mean they're in there properly.
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Old 03-01-2006, 02:47 PM
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Front rubber gasket under intake manifold most likely has dried out and cracked letting oil out from under the intake, common problem.
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Old 03-01-2006, 02:55 PM
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illegalFSJ - do you know what those bolts are called so I can look up their specified torque? Or better yet do you know the torque?

thanks, will look at the manifold gasket too!
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Old 03-01-2006, 03:59 PM
illegalFSJ illegalFSJ is offline
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Intake manifold bolts. They torque to around 43 ft. lbs. Smear a little pipe sealer on there to keep the oil from winding it's way up the threads.

[ March 01, 2006, 10:02 PM: Message edited by: illegalFSJ ]
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"Well, what gears do you have? If you have 2.72s in there still, a blown big block with jesus himself working the gas pedal couldnt get the rear tires to slip." -Mavawreck

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Old 03-02-2006, 02:13 AM
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letank letank is offline
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oil filler pipe could be loose.... can you yank the pipe up... or twist it.....

remove clean both side and put a dab of permatex #2
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Old 03-02-2006, 10:17 AM
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chrisnsarah chrisnsarah is offline
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Replace the neophrene gasket at the front of the intake with RTV. It seals better. Also hammer out any indentations from overtightened bolts in the valve covers. Put some loctite on the cover bolts and snug them down lightly.
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Old 03-02-2006, 11:42 AM
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take a good look at the timming cover where the oil pump gear shaft is pressed in. i had a oil leak there and it took me a week to find it. the oil ran down and looked like filter was leaking.
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Old 03-18-2006, 02:23 PM
blakeusa45 blakeusa45 is offline
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Have a similar issue- leaking at the filter/adaptor connection. Brand new engine. No oil dripping down from valve covers, intake, timing cover and filter on tight.

New AMC 401 w/ high compression rig putting out 400Hp.

Was told there is a pressure release valve on the side of the oil filter adaptor. Was told I may have a high pressure spring which may be putting too much oil pressure on the filter connection when it opens. Filter is tight, but it's leaking. Other idea is that the connection is not flat...

Any other ideas

Have orderd a new oil filter adaptor and will replace the spring
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