This oil leak is killing me!!!!!!!!!
Thread Starter
Junior Member
Joined: Sep 2005
Posts: 61
Likes: 0
From: Troy, NC
Car: 1987 Z28
Engine: 350 (357ci)
Transmission: 700r4
Axle/Gears: 3.42 posi
This oil leak is killing me!!!!!!!!!
I can not track this leak down to save my life. I thought it was the oil pan so I changed the gasket but thats not it. The back of the intake manifold is dry, the dizzy seal is dry, the oil sending unit is dry. Im running out of things to check. When I have the car setting still at idle it will leave about a 4" puddle in 20 mins, when I shut it off it drips once or twice then stops.
In this pic the red arrow points to where the oil collects into a puddle, the green arrow is where it runs down to leak on the ground.

Here is a pic of my dizzy and oil sending unit, the green arrows are where I checked for leaks.

Any help would be great.
In this pic the red arrow points to where the oil collects into a puddle, the green arrow is where it runs down to leak on the ground.

Here is a pic of my dizzy and oil sending unit, the green arrows are where I checked for leaks.

Any help would be great.
Member
Joined: Jul 2004
Posts: 340
Likes: 0
Car: 1984 Camaro on steroids/ 1987 iroc-z28 5 speed.
Engine: 383 nitrous motor / poindexter 305
Transmission: Th350
It IS the intake plenum seal. (the rear one that takes silicone) Had the exact problem with my black camaro, I didnt even see it on the back of the block much, re-gasketed & sealed it, never was a problem again.
Thread Starter
Junior Member
Joined: Sep 2005
Posts: 61
Likes: 0
From: Troy, NC
Car: 1987 Z28
Engine: 350 (357ci)
Transmission: 700r4
Axle/Gears: 3.42 posi
I took off the intake and it looks like it could have been leaking from back there. I have the Felpro gasket set for it. Should I use the rubber gaskets and sealer or just straight sealer?
Member
Joined: May 2004
Posts: 418
Likes: 0
From: Fort Lauderdale
Car: 1991 Pontiac Trans Am
Engine: 305
Transmission: 700r4
Use the side gaskets and rtv/sealer on the china walls. That ought to seal it right up. Oh, and since it's off, you're better off replacing the distributor gasket so that doesn't start leaking from being moved around, if you hadn't planned to already.
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