Intake leaks???
Thread Starter
Racer
Joined: Oct 2003
Posts: 273
Likes: 0
From: Midland Texas
Intake leaks???
88 L98 C4. Has anyone heard of any common cracking or leaking intake manafolds internally, causing oil consumption. Mine is using oil and I just bored and installed new pistons and thats why I went there in the first place. I looked the intake over twice, nothing evident. Got to be the intake... Thanks in advance... :banghead:
Thread Starter
Racer
Joined: Oct 2003
Posts: 273
Likes: 0
From: Midland Texas
Re: Intake leaks??? (cash's90)
Yes all new, 2nd time I have been there looking for this problem...We did not replace the guides but did the seals. It was using about 1 quart per 300 miles. I just put 100 miles on this motor and it would still smoke when you throttle it up a little. Unless it is still burning oil out of the exhaust system that was there already. I doubt it...
[Modified by autotech, 5:30 PM 2/5/2004]
[Modified by autotech, 5:30 PM 2/5/2004]
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: Intake leaks??? (autotech)
The only GM manifolds I've heard about with cracking problems are on the 3.8 6 and I believe only the plastic ones. Did you lay a straight edge across it to make sure it isn't warped? Anything shaved off the deck for the rebuild? If so, may need a few thousands off the manifold for proper alignment. Is the splash shield attached? You might try a little RTV on the gaskets, though if its aligned and straight and the water passages don't show any signs of corrosion, that shouldn't be necessary.
