GASKET IN PLACE OF RTV ON ROCKER ARM COVER

SUBJECT: USE OF GASKET IN PLACE OF RTV ON THE 2.5L ROCKER ARM COVER (INFORMATION)

VEHICLES AFFECTED: 1980-91 A,F,N,P,W AND-X CARS, M.S AND T TRUCKS

This bulletin cancels and deletes Product Service Bulletin #89-625-112 and #90-625-101. All copies of these should be discarded.

- Two styles of rocker arm covers are available, with and without dimples in the flange area.

- Both silicone/steel and cork/rubber gaskets are available for service applications.

- With the dimpled cover, the cork/rubber gasket, P/N #10101791 is preferred; however, RTV may be used.

- 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. DO NOT USE A SILICONE/STEEL GASKET WITH A DIMPLED COVER.

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 with a new like part.

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 in.lbs.).

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.