Cooling System - Block Heater Leakage/Installation
87chevy22Number: 88-60-6B
Section: 6B
Date: OCT., 1987
Subject: ENGINE BLOCK HEATER LEAKAGE
AND/OR INSTALLATION ON L-4 AND V6 ENGINE
Model and Year: 1987-88 CAVALIER, CORSICA
BERETTA WITH L-4 (VIN CODE 1) OR V6 (VIN CODE W) ENGINE
TO: ALL CHEVROLET DEALERS
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 (YIN 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 N-m (1.6 - 2.0 Ft.Lb.). The V6 2.8L (VIN CODE W) engine block heater is located at 6 o'clock and torqued to 1.6 - 2.2 N-m (1.2 - 1.6 Ft.Lb.).