Coolant Heater Replacement

Removal Procedure





1. Turn the ignition OFF.
2. Drain the engine cooling system. Refer to Draining and Filling Cooling System.
3. Raise and support the vehicle. Refer to Vehicle Lifting.
4. Remove the right front wheel.
^ For vehicles with steel wheels, refer to Tire and Wheel Removal and Installation in Steering and Suspension.
^ For Chevrolet and Oldsmobile vehicles with aluminum wheels, refer to Tire and Wheel Removal and Installation in Steering and Suspension.
^ For Pontiac and Export vehicles with aluminum wheels, refer to Tire and Wheel Removal and Installation in Steering and Suspension.
5. Remove the right engine splash shield. Refer to Splash Shield Replacement - Engine in Body and Frame.
6. Remove the engine coolant heater cord from the engine coolant heater.
7. Loosen the coolant heater bolt/screw.





8. Remove the coolant heater.

Installation Procedure





1. Apply GM P/N 9985164 (or equivalent) to the coolant heater seal.
2. Ensure that the coolant heater element is horizontal and pointed toward the front of the engine.
The three O'clock position (2) is DESIRED.
The two O'clock position (1) and the four O'clock position (3) are acceptable.





3. Install the coolant heater.
4. Install the coolant heater bolt/screw.
^ Tighten the coolant heater bolt/screw to 2 Nm (18 inch lbs.).





5. Install the engine coolant heater cord to the engine coolant heater.
6. Install the right engine splash shield. Refer to Splash Shield Replacement - Engine in Body and Frame.
7. Install the right front wheel.
^ For vehicles with steel wheels, refer to Tire and Wheel Removal and installation in Steering and Suspension.
^ For Chevrolet and Oldsmobile vehicles with aluminum wheels, refer to Tire and Wheel Removal and Installation in Steering and Suspension.
^ For Pontiac and Export vehicles with aluminum wheels, refer to Tire and Wheel Removal and Installation in Steering and Suspension.
8. Lower the vehicle.
9. Fill the engine cooling system. Refer to Draining and Filling Cooling System.