SERVICE MANUAL UPDATE-SEC.6 MAIN BEARING CLEARANCE SPECS

Subject: MANUAL UPDATE SEC. 6 ENGINE SPECIFICATIONS 2.5L (CRANKSHAFT MAIN BEARING CLEARANCE AND END PLAY SPEC.)

Models Affected: 1989-90 6000 AND GRAND AM MODELS

SERVICE MANUAL UPDATE

When measuring the crankshaft main bearing clearance or end play on the 2.5L engine use the following specifications:

VIN R

Crankshaft Main Bearing Clearance - 0.013 - 0.056 mm (0.0005 - 0.0022") Crankshaft End Play - 0.13 - 0.26 mm (0.0051 - 0.010")

VIN U

Crankshaft Main Bearing Clearance - 0.013 - 0.056 mm (0.0005 - 0.0022") Crankshaft End Play - 0.15 - 0.28 mm (0.0059 - 0.011")

THIS INFORMATION APPLIES TO THE FOLLOWING SERVICE MANUALS:

1990 Pontiac 6000 Page 6A1-42 1989 Pontiac 6000 Pages 6A1-22 and 6A1-23

1990 Pontiac Grand AM Page 6A3-43 1989 Pontiac Grand AM Page 6A3-39

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.