Firebird V8-350 5.7L VIN P SFI (1996)
Intake Manifold: All Technical Service Bulletins
Engine - Oil Leaks Between Intake Manifold and Block
File In Section: 6.- Engine
Bulletin No.: 77-61-17
Date: October, 1997
Subject:
Oil Leaks Between Intake Manifold and Engine Block
(Reseal the Mating Surfaces)
Models:
1992-96 Chevrolet Corvette
1993-97 Chevrolet Camaro
1993-97 Pontiac Firebird with 5.7L Engine (VINs P, 5 - RPOs LT1, LT4)
Condition
Oil leaks at mating surfaces between the intake manifold and engine block. Sometimes called "China Wall." (See Figures 1 and 2).
Cause
Insufficient RTV bonding between the intake manifold and cylinder block.
Correction
It is very important to identify the source of the leak. Clean and dry area thoroughly before inspection. Use black light and oil dye to identify the source.
If the China Wall area is found to be the source of the leak, reseal the mating surfaces with "3 BOND" RTV (P/N 12346141).
