Engine Rear Main Cap - Installation Procedure
90pontiac19Bulletin Number: 91-6-3
Reference Number: 006104
Publish Date: 8/90
Subject: REMOVAL/INSTALLATION PROCEDURE OF # 4 REAR MAIN BEARING CAP
Models
Affected: 1990-91 BONNEVILLE MODELS WITH 3800 ENGINE VINS C
Anytime the # 4 (Rear) main bearing cap has been removed during servicing, the following installation procedures must be followed.
The # 4 (Rear) main bearing cap must be installed flush with or .254 mm (.010 in.) forward of the rear face of the cylinder block. Misalignment of the cap toward the transaxle may cause interference with the flywheel to converter bolt heads.
The rear main bearing lip seal must be replaced whenever the # 4 (Rear) main bearing cap is removed. The new seal should be installed after the main bearing cap has been installed. Installing the # 4 (Rear) main bearing cap with the rear main bearing lip seal in place may cause pinching or misalignment of the seal resulting in an oil leak.