DIESEL VALVE LIFTER: IN THE 1981 SERVICE MANUAL ON PAGE 6A5-53, FIG. 6A5-50 SHOWS THE INCORRECT MAKE UP OF PARTS IN THE DIESEL HYDRAULIC VALVE LIFTER. FIG. 13 SHOWS THE CORRECT EXPLODED VIEW OF THE LIFTER. THE DIFFERENCE IS THAT THE LIFTER USES A BALL CHECK INSTEAD OF THE VALVE DISC. * ILLUSTRATION *
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.