Riviera V6-3.8L SC VIN 1 (1995)
Crankshaft Main Bearing Seal: Customer Interest
Engine - Oil Leak at Rear of Engine Near Flywheel Cover
File In Section: 6 - Engine
Bulletin No.: 77-61-16A
Date: September, 1997
Subject:
Engine Oil Leak at Rear of Engine Near Flywheel Cover
(Replace Crankshaft Rear Oil Seal Housing Gasket)
Models:
1995-97 Buick Park Avenue, Riviera (VIN K)
1996-97 Buick LeSabre, Regal (VIN K)
1996-97 Buick Park Avenue, Riviera (VIN 1)
1997 Buick Regal (VIN 1)
1995-97 Chevrolet Camaro (VIN K)
1995-96 Oldsmobile Ninety Eight (VIN K)
1995-97 Oldsmobile Eighty Eight, LSS (VIN K)
1996-97 Oldsmobile LSS (VIN 1)
1997 Oldsmobile Regency (VIN K)
1995-97 Pontiac Bonneville, Firebird (VIN K)
1996-97 Pontiac Grand Prix (VIN K)
1996-97 Pontiac Bonneville (VIN 1)
1997 Pontiac Grand Prix (VIN 1) with 3800 Engine (VIN 1, K - RPO L67, L36)
This bulletin is being revised to correct the File In Section. Please discard Corporate Bulletin Number 77-61-16.
Condition
Some owners may comment about an engine oil leak that appears to originate toward the driver's side of the vehicle; rear of engine.
Cause
The crankshaft rear oil seal housing gasket may be split.
Correction
Diagnostics
1.
Install oil dye into the crankcase and warm the engine up to operating temperature by driving the vehicle a few miles.
2.
Raise the vehicle on a hoist with the engine running and inspect for oil leaks by using a black light.
3.
Shut the engine off and remove the flywheel inspection cover.
4.
Use the black light to check for oil leaks in the flywheel area. A leak in this area may be due to a split gasket on the crankshaft rear oil seal
housing.
If the leak appears to originate in the flywheel area, then remove the crankshaft rear oil seal housing and install a new gasket and a new crankshaft rear
oil seal. Follow the procedure outlined in the Service Manual.
Important:
Do Not Use Any Type of Adhesive on the Housing Gasket when Reinstalling. The plastic inserts in the housing are a manufacturing assembly aid
and are not required for service.
Parts Information
Parts are currently available from GMSPO.
Description
P/N
Fluorescent Tracer Dye, Gas
Engine Oil (1oz.)
12345795
