Main/Connecting Rod Bearing - Clearance Revision

9223buick04

Bulletin:
91-6-4

Date:
Nov. '90

Ref. No.:
91-052-6

Corp. Ref. No.:
006107


SUBJECT:
SERVICE MANUAL UPDATE - SECTION 6A - REVISED CRANKSHAFT
MAIN BEARING AND CONNECTING ROD BEARING CLEARANCES

MODELS AFFECTED:
1985-1991 ALL MODELS WITH 3.0 (VIN E, L)
3300 (VIN N)
3.8 (VIN A,B,3,7,9)
3800 (VIN C,L)


The following revised bearing clearances should be used when servicing main bearings and connecting rod bearings on the engines listed above. Note that the clearances are the same for main and rod bearings.

CRANKSHAFT MAIN BEARINGS

Bearing to Journal Clearance 0.020 - 0.055 mm.
(.0008 - .0022 in.)

CONNECTING ROD BEARINGS

Bearing to Journal Clearance 0.020 - 0.055 mm.
(.0008 - .0022 in.)