Cylinder Head Gasket - Improved Design
Number: 87-204Section: 6A
Date: AUG., 1987
Subject: NEW CYLINDER HEAD GASKETS
Model and Year: 1987 AND PAST MODEL YEAR PASSENGER
AND TRUCK VEHICLES EQUIPPED WITH 4.3L, 5.0L AND 5.7L 90 DEGREE V ENGINES
TO: ALL CHEVROLET DEALERS
An improved cylinder head gasket of composite construction has been released to replace the metal gasket. The new gasket has improved sealing capabilities. The new part numbers shown below should be used for service.
Application Cylinder Head Gasket
4.3L Passenger and Truck 10066080
5.0L Passenger and Truck 10066081
5.7L Passenger and Truck 10066082
Engines manufactured after the following build dates should have the composite gasket.
Engine Build Date Engine Build Code
4.3L May 15, 1987 T0515XXX
5.0L July 1, 1987 V0701XXX
K0701XXX
5.7L July 1, 1987 V0701XXX
K0701XXX