UPDATE-CRANKSHAFT BEARING & JOURNAL SPEC./ADDITIONAL SPECS

Models Affected: 1989 BONNEVILLE MODELS

Crankshaft bearing and journal specifications were omitted from the 1989 Bonneville service manuals. Specifications are as follows.

Connecting Rod Bearing

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

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

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

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

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

Crankshaft Main Bearing:

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

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

Journal Taper in. .0003 (mm) (.008)

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

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

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

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.