OIL LEAKS FROM REAR OF ENGINE (REPLACE PLUG). Oldsmobile Custom Cruiser 1992

For 1990-2009 cars

# OIL LEAKS FROM REAR OF ENGINE (REPLACE PLUG)

#### SUBJECT: OIL LEAKS FROM REAR OF ENGINE (REPLACE PLUG)

#### VEHICLES AFFECTED: 1992 "B, D, F, Y" MODELS AND "C/K, RN, G AND P" TRUCKS WITH FLINT 5.0L AND 5.7L ENGINES

APPLICATION: (ENGINE)

VIN Code RPO Code -------- -------- Passenger Car Engine 5.OL E L03 5.OL F LB9 5.7L 8 L98 5.7L P LT1 Truck Engine 5.OL H L03 5.7L K L05

#### CONDITION:

--------- Some owners of 1992 passenger cars and trucks with Flint built 5.OL or 5.7L V8 engines may comment on oil leaks from the rear of the engine. Flint built engines will have the letter "V" as the first digit of the engine serial number stamped on the engine block forward of the right hand cylinder head. Some of these leaks may be misdiagnosed as a rear main crankshaft seal or oil pan gasket leak.

#### CAUSE:

----- Insufficient sealant around the camshaft plug, P/N 3997752, at the rear of the engine block.

#### CORRECTION:

---------- Before making repairs for rear main crankshaft seal or oil pan gasket leaks, check the cam plug by disconnecting the transmission and visually inspecting for oil leaks around the cam plug. Replace the plug if necessary. Use the following procedure to install a new plug:

0 Coat plug outside diameter with GM part number 12346004 sealant or equivalent.

0 Install plug flush to 0.79 mm (1/32 inch) deep.

#### WARRANTY INFORMATION:

For vehicles repaired under warranty use:

Labour Operation: J1660

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.