NO START AND/OR STARTER NOISE- DIESEL 6.2L

Model and Year: 1982-85 CKPG 10-30 WITH 6.2L DIESEL ENGINES

TO: ALL CHEVROLET DEALERS

Some 6.2L diesel engines may experience starter motor and flex plate teeth milling which could cause a no start condition. A newly designed starter drive housing is available through WDDGM to alleviate this condition. The 1986, 6.2L engine starter motor does not require shims during initial assembly and can be identified by the words "No Shim" on the end drive housing. To retrofit pre-1986 starter motor assemblies, the following parts are used:

Description Model Quantity Part Number ------------ ----- -------- ----------- Starter Drive End Housing C,G,P (1) 10496542 K (1) 10496538 Mounting Bolts All (2) 15544950 Mounting Washers All (2) 22521054 Shim (1.0 mm) All (Max 2) 23500396

Disassemble the starter per instructions in Section 6D Engine Electrical in the Light Duty Truck Service Manual.

Inspect the flywheel/flexplate and starter drive gear for damage and replace as required.

Discard old starter mounting bolts.

Install new starter end housing and starter assembly.

Reassemble as per instructions in Section 6D Engine Electrical, in the Light Duty Truck Service Manual.

The new starter mounting bolts should be torqued to 35-40 N.m (25-30 ft.lbs.). If a noise occurs during cranking or after the engine fires on pre-1986 engines, the starter may need to be shimmed. The redesigned 1.0 mm shim (P/N 23500396) should be installed to correct the condition. Do not use more than 2.0 mm of shims. Slotted shims as used previously should not be used because they do not provide sufficient support for the aluminum starter end housing. This lack of support will cause housing wear and eventual loss of mounting bolt torque.

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.