METHOD TO REMOVE PUSH ROD COVERS W/O COVER DAMAGE

MODELS: 1985 AND 1986 S/T TRUCK SAND M VANS EQUIPPED WITH THE LN8 2.5L ENGINE

A new procedure has been developed to remove the push rod cover from 2.5L. L4 engines without damaging the cover using components that already exist on the engine.

Removal S/T Truck ----------------- To remove the cover, unscrew the four nuts from the cover attaching studs (see Figure No. 1), reverse two of the nuts so the washers face outward and screw them back onto the inner two studs. Assemble the two remaining nuts to the same two inner studs with washers facing inward. Using a small wrench on the inner nut, on each stud, jam the two nuts tightly together. Again using the small wrench, on the inner nut, unscrew the studs until the cover breaks loose.

Removal M Van

To remove the cover, unscrew the two outboard nuts from the attaching studs. Loosen the two inboard nuts, install one hex nut (M6X1) on each of the two inboard studs, and jam the nuts together. Using a small wrench, on the inner nut, unscrew the studs until the cover breaks loose.

After breaking the cover loose, remove the jammed nuts from each stud. Remove the cover from the studs. Examine the stud and rubber washer assembly and replace if either stud or washer is damaged. Reassemble the two studs (see Figure No. 2) to the middle two positions and torque to 10 N.m (90 in.lb.).

Use applicable labor operation number and labor time.

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.