UPDATE-CRANKSHAFT BEARING & JOURNAL SPEC./ADDITIONAL SPECS

VEHICLES AFFECTED: 1989 C-H-E CARS

Crankshaft bearing and journal specifications were omitted from the 1989 service manuals for C-H-E Cars. Specifications are as follows:

Connecting Rod Bearing

Journal O.D. mm 57.117-57.147 (in. 2.2487-2.2499)

Run-out mm .008 (in. .0003)

Taper mm .008 (in. .0003)

Bearing to Journal mm .0076-.0711 (in. .0003-.0026) Clearance

Side Clearance mm .076-.381 (in. .003-.0026)

Connecting Rod mm 60.295-60.312 (in 2.3738-2.3745) Large End Bore I.D.

Crankshaft Main Bearing:

Journal O.D. mm 63.470-63.495 (in. 2.4988-2.4998)

Journal Run-Out mm .008 (in. .0003)

Journal Taper mm .008 (in. .0003)

Bearing to Journal mm .008-.045 (in..0003-.0018) Clearance

End Play mm .076-.279 (in. .003-.011)

Main Bearing mm 68.275-68.250 (in. 2.688-2.687) Bore I.D.

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.