Oil Leak On 95

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Jun 19, 2005 | 10:31 PM

RACERB

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From: Pittsburgh PA

Oil Leak On 95

I just changed the oil on my 95 and the next day I noticed some drips of oil on my floor. I jacked it up and started wipe'n all the oil off, put newspapers down and let it sit overnite. The next day there was about 6 drops on the paper and it looks like it's coming from around the opti-spark. Can anybody tell me how to fix this? Thanks, Bob

Jun 20, 2005 | 12:30 PM

onedef92

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From: Fort Knox, KY

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Don't know if you're aware of this but the LT1 motor is known to have a badly sealed intake manifold.

Reach around (from the top) behind the intake manifold, and find the joint where it sits on the block. This is where it leaks. If you have oil leaking up here, you'll have it on your hands as you feel around.

The fix is to remove the intake, and re-install it with new gaskets and gasket sealer, letting it dry overnight before starting the car up.

Jun 20, 2005 | 12:41 PM

STL94LT1

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From: O'Fallon Missouri

It could also be the timing cover seals.

Jun 20, 2005 | 01:53 PM

bogus

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From: San Pedro CA

geez... on the LT1 is could be damned near anything.

1) Intake

2) Waterpump shaft seal

3) optispark shaft seal

4) front main seal - this is tricky, cause the hub can wear and make a new seal equally useless.

5) timing cover

6) oil pan gasket

7) oil filter housing

8) rear main seal

9) cam retainer at back of motor

10) oil pressure sensors

See? more places for these things to leak than you can shake a stick at!

Jun 20, 2005 | 04:39 PM

RACERB

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From: Pittsburgh PA

Thanks!!!!

Thankyou for everyones help!!! Bob, From Pittsburgh Pa.

Jun 20, 2005 | 06:51 PM

Corvette Kid

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From: Good health is merely the slowest possible rate at which one can die

St. Jude Donor '04-'05-'06-'07

Quote:

Originally Posted by STL94LT1

It could also be the timing cover seals.

If it's leaking in the front, it's likely one of these, there are three up there. Opti, crank seal and w/p drive seal. If one is leaking, replace all three since you'll be right there. The other possibility for a front leak is the aforementioned intake, usually from the corner(s).

Jun 21, 2005 | 04:19 PM

RACERB

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From: Pittsburgh PA

Thanks for the help Corvette Kid . Do you think that 5w-30 mobil 1 is too light for the summer since this leak only started when I changed the oil? I just bought the vette a month ago and didn't know the weight of oil I took out. Maybe running 10w-30 mobil 1 will stop the leak? Fellow forum members I NEED your opinion...

Last edited by RACERB; Jun 21, 2005 at 04:35 PM.

Jun 21, 2005 | 05:13 PM

Redeasysport

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From: Myrtle Beach SC

St. Jude Donor '05-'06

Quote:

Originally Posted by RACERB

Oil thickness will not effect the leak. This is a common problem with the LT1 mine does it. It is not that hard to do the intake it is on my list the gaskets are on the shelf. I have read it is best to dimple the areas where the RTV is applied so it does not blow out (like it did to start leaking)