SERVICE MANUAL UPDATE-SEC.6 MAIN BEARING CLEARANCE SPECS

SUBJECT: MANUAL UPDATE SECTION 6 ENGINE SPECIFICATIONS 2.5L (CRANKSHAFT MAIN BEARING CLEARANCE AND END PLAY SPEC.) (REVISED TO CORRECT CRANKSHAFT END PLAY)

VEHICLES AFFECTED: 1989-90 A,W,N CAR

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 Chevrolet Celebrity Page 6Al-42 1989 Chevrolet Celebrity Pages 6Al-22 and 6Al-23

1990 Chevrolet Lumina Page 6Al-4O

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

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

1989 Oldsmobile Cutlass Ciera and Cutlass Cruiser Pages 6Al-22 and 6Al-23

1990 Oldsmobile Cutlass Calais Page 6A3-43 1989 Oldsmobile Cutlass Calais Page 6A3-39

1990 Buick Century Page 6Al-42 1989 Buick Century Pages 6Al-22 and 6Al-23

1990 Buick Skylark Page 6A3-43 1989 Buick Skylark 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.