Monte Carlo V6-3.8L SC VIN 1 (2004)
Engine Block Heater: Service and Repair
Coolant Heater
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).