UPDATE-CRANKSHAFT BEARING & JOURNAL SPEC./ADDITIONAL SPECS

MODELS/YEARS 1989 EIGHTY-EIGHT, NINETY-EIGHT AND TORONADO MODELS WITH 3800 (VIN CODE C)

Crankshaft bearing and journal specifications are incorrect in the 1989 service manuals for the above carlines. The specifications listed below replace the ones now found on page 6A5A-32, Figure 71 of the 1989 Eighty-Eight and Ninety-Eight Service Manual and page 6A5E-33, Figure 71 of the 1989 Toronado Service Manual.

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.