Bonneville V6-231 3.8L VIN 3 SFI (1988)
Crankshaft Main Bearing: Technical Service Bulletins
Crankshaft/Connecting Rod - Manual Update
Bulletin Number:
91-6-12
Reference Number:
006107
Publish Date:
11/90
Subject:
SERVICE MANUAL UPDATE - SEC.6 ENGINE MECH-CRANKSHAFT MAIN BEARING, CONNECTING ROD (NEW
BEARING CLEARANCE)
Models Affected:
1985-91 BONNEVILLE AND GRAND AM MODELS WITH 3.0, 3.8, AND 3800 ENGINES
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.)
