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Old 04-26-2017   #10
Dynomite
 
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Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,816
Default Re: 91 ZR1 - Latest Issue Oil Leak

Quote:
Originally Posted by TealZR1 View Post
I am the original Poster - After getting the car up on the lift at the shop, appears the oil leak is coming from the "oil vent/drain tube" on the oil pan. Did I read that comes from somewhere/something under the plenum? The pic shows it could be there. Thanks
That Tube is what is called.....the Valley Drain.

You have to remove the Plenum, the Coils, and the Starter to get to the Valley Drain (to clean everything). Good to know your Valley Drain is not clogged. Under the Plenum could be Injector Housing gaskets (tighten Injector Housing Bolts), Crankcase Cover (tighten Crankcase Cover Bolts or new gaskets).

If any bolts appear loose when re-tightening......I just remove the bolts, clean the threads and apply blue Loctite before re-installing the bolts. If I replace the gaskets........I Clean the surfaces and use a bit of Permatex on the gaskets (both sides) for a good oil seal.

I also Block TB Coolant at the Injector Housings and use nothing on the Plenum Gasket since no oil or coolant is involved in that seal.

It is all in my signature

Last edited by Dynomite; 04-26-2017 at 12:30 PM.
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