Omega L4-151 2.5L VIN 5 2-bbl (1982)
Valve Cover Gasket: Technical Service Bulletins
Engine Rocker Arm Cover - Using Gasket in Place of RTV
SUBJECT
USE OF GASKET IN PLACE OF RTV ON THE 2.5L
ROCKER ARM COVER (INFORMATION)
MODELS/YEARS
1982-84 OMEGA, 1982-91 CUTLASS CIERA, 1985-91
CUTLASS CALAIS WITH 2.5L ENGINE (VIN CODE R,U)
NUMBER:
91-T-20
CORP.REF.NO: 036109R
DATE:
November 1990
SECTION:
6A
This bulletin replaces Dealer Technical Bulletin 90-T-02.
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Two styles of rocker arm covers are available, with and without dimples in the flange area.
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Both silicone/steel and cork/rubber gaskets are available for service applications.
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With the dimpled cover, the cork/rubber gasket, P/N 10101791 is preferred; however, RTV may be used.
IMPORTANT:
DO NOT USE A SILICONE/STEEL GASKET WITH A DIMPLED COVER.
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With the non-dimpled cover, the silicone/steel gasket, P/N 10124688 is preferred. However, the cork/rubber gasket may be used.
IMPORTANT:
DO NOT USE RTV WITH A NON-DIMPLED COVER.
Parts are currently available from GMSPO.
Even though the gaskets are less sensitive to surface contamination, it is recommended that the sealing surfaces be as clean as possible to assure a
reliable seal.
Inspect the rocker arm cover for any bent or distorted flanges. If the flanges are damaged, replace the cover.
For the composite cork/rubber gasket, remove the protective paper from the gasket. Place the sticky side of the gasket onto the rocker arm cover.
NOTICE:
IT IS ESSENTIAL THAT THE PROTECTIVE PAPER BE REMOVED PRIOR TO GASKET INSTALLATION FOR LEAK
PREVENTION.
Install the rocker arm cover onto the cylinder head and torque the cover bolts to 5 N-m (45 Lbs.In.)
