For 1990-2009 cars

# CYLINDER HEAD GASKET LEAK REPAIR PROCEDURES-DIESEL

A RECURRENCE OF A HEAD GASKET LEAK ON A DIESEL ENGINE WHICH HAD THE NEW HEADGASKETS INSTALLED, (PART NUMBER 22513605) COULD BE CAUSED BY ONEOF THE FOLLOWING CONDITIONS:

HEAD BOLTS WERE NOT CLEANED AND OILED BEFORE REINSTALLATION IN BLOCK.

PRECHAMBERS PROTRUDING ABOVE SURFACE OF CYLINDERHEAD.

BURRS ON CYLINDER HEAD.

DIRT OR RUST IN CYLINDER HEAD BOLTS HOLES.

HEAD GASKETS WERE SPRAYED WITH COPPER COAT SEALER.

THE PROCEDURES IN BULLETIN 81-I-130 FILE GROUP 60 #30 SHOULD BE FOLLOWED WHEN REPLACEMENT OF A DIESEL ENGINE HEAD GAKSET IS NECESSARY.

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.