Removal Procedure
- Drain the engine coolant. Refer to
Cooling System Draining and Filling
.
- Remove the coolant heater cord from the heater.
Important: Do not score the surface of the engine block
hole when removing the coolant heater.
- Remove the coolant heater from the block.
Installation Procedure
- Remove any burrs, sealer, paint or other
foreign material from the threads/sealing surface of the engine block and from the
old coolant heater if the heater is to be reused.
- If reusing the old coolant heater, apply thread sealant GM P/N 12346004
(Canadian P/N 10953480), or equivalent to the threads.
Notice: Refer to Component Fastener Tightening Notice in the Preface section.
- Install the coolant heater to the engine block.
Tighten
Tighten the coolant heater to 50 N·m
(37 lb ft).
- Install the coolant heater cord to the heater.
- Fill the cooling system. Refer to
Cooling System Draining and Filling
.