Camaro Z28 V8-305 5.0L VIN F FI (1991)
Intake Manifold: Customer Interest
Engine - Internal Coolant Leaks
Number:
92-77-6B
Section:
6B
Date:
JAN. 1992
Corporate Bulletin No.: 136009R
ASE No.: A1, A8
Subject:
INTERNAL COOLANT LEAKS
Model and Year:
1991-92 CAMARO
Condition:
Some owners of the above vehicles with a VIN F (LB9 V8) engine built before VIN breakpoint:
NL110563
or a VIN 8 (L98 V8) engine built before VIN breakpoint:
NL111173
may comment on a loss of engine coolant without visible coolant leaks.
Cause:
This condition may be caused by an internal coolant leak between the cylinder head and intake manifold at the coolant crossover
passages.
Correction:
Perform the following procedure:
1.
Remove the rocker covers.
2.
Remove the intake manifold.