Heater Replacement

Coolant Heater Replacement (4.2L Engine)

Removal Procedure





1. Drain the engine coolant.
2. Remove the PCM.
3. Remove the harnesses from the engine harness bracket.
4. Remove the bolt that secures the engine harness bracket and remove the bracket.





5. Remove the coolant heater cord from the heater (2).





6. Remove the coolant heater from the block.

Installation Procedure





1. Install the coolant heater to the engine block.
^ Tighten the coolant heater to 50 Nm (37 ft. lbs.).





2. Install the coolant heater cord to the heater (2).

Notice: Refer to Fastener Notice in Service Precautions.





3. Install the engine harness bracket and secure the bracket with the bolt.
^ Tighten the engine harness bracket bolt to 45 Nm (33 ft. lbs.).
4. Secure the harnesses to the bracket.
5. Install the PCM.
6. Fill the cooling system.