Coolant Heater Replacement

Coolant Heater Replacement (3.8L)

Removal Procedure




1. Drain the cooling system.
2. Disconnect the coolant heater cord from the coolant heater.
3. Loosen the bolt at the coolant heater but do not remove.
4. Remove the coolant heater.
5. Remove and clean any burrs, compound, paint, or rough spots from the core plug hole.

Installation Procedure




1. Apply a coat of GM P/N 12346004, (Canadian P/N 10953480) thread sealant with Teflon or equivalent to the O-ring and clean the surface of the plug opening.
2. Install the coolant heater by pushing tight to the block.




3. Install the coolant heater so the element is at the 9 o'clock position (2).

Notice: Refer to Fastener Notice in Service Precautions.

4. Tighten the coolant heater bolt until both locking wings draw tight against the inner wall of the engine block.

Tighten the bolt to 2 N.m (17 lb in).

Notice: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.

5. Connect the coolant heater cord to the coolant heater.
6. Fill the cooling system.