ENGINE BLOCK HEATER LEAKAGE (REPLACE BLOCK HEATER)

ENGINE BLOCK HEATER LEAKAGE AND INSTALLATION ON L-4 ENGINE AND V 6 ENGINE

VEHICLES AFFECTED: 1987 AND 1988 "J" AND "L" VEHICLES WITH L-4 ENGINE (VIN ----------------- CODE 1) OR V6 ENGINE (VIN COP "W

Improper engine block heater installation may lead to a coolant leakage problem. If the block heater is identified as the coolant leakage source, then the heater should be replaced. Reuse of any engine block heater is not recommended because of stressed clamping and sealing components.

Correct installation of the L-4 -2.0L (VIN CODE 1) engine block heater is in the 5 o'clock position as shown in the Illustration. Torque the central screw to 2.2 - 2.8 Nm (1.6 - 2.0 Lb. Ft.). The V6 2.8L (VIN Code W) engine block heater is located at 6 o'clock and torqued to 1.6 - 2.2 Nm (1.2- 1.6 Lb. Ft.).

This is an information bulletin only.

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.