(Technical Assistance Needed)
Thread Starter
Racer
Joined: Oct 2003
Posts: 273
Likes: 0
From: Midland Texas
(Technical Assistance Needed)
(88 C4 TPI) My engine is using oil on a fresh rebuild. Exhaust is soaked. Oil is coming up through the EGR system. We used the old pistons, hoaned and re-ringed. I resealed the intake, did not help. I dont show any blow-by, PCV system is clean as a pin. I have the engine scattered now and the pistons dont show to be leaking by, and the bore is not too far out. How's it getting in there? If not the intake or rings....Head gaskets look to be sealing well. I'm lost at the moment. We are going to bore and install new pistons but I am sceptical...
Heel & Toe
Joined: Jan 2002
Posts: 17
Likes: 0
From: bethel springs tn
Re: (Technical Assistance Needed) (autotech)
i have seen this problem before on the forum. they said it was so bad it was running out of the throttle body, but all i can remember is that it had to do with the egr system. i just can not remember the exact part that was bad.
it could still be a blowby problem though.
it could still be a blowby problem though.
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: (Technical Assistance Needed) (autotech)
I did look for cracks in the intake. Maybe I need to look again...
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: (Technical Assistance Needed) (autotech)
Honed and re-ringed with the original pistons?
You probably have pistons fitting too loose to seal. Have you mic'd the bore and the pistons? If so, what are the measurements?
You probably have pistons fitting too loose to seal. Have you mic'd the bore and the pistons? If so, what are the measurements?
Thread Starter
Racer
Joined: Oct 2003
Posts: 273
Likes: 0
From: Midland Texas
Re: (Technical Assistance Needed) (BBA)
My machinist checked them. I have it back down there now to be bored - Installing TRW flat-tops. If the problem was there. It will be no more... :thumbs: