Coolant Heater Replacement

Removal Procedure





1. Drain the engine coolant from the cooling system. Refer to Draining and Filling Cooling System.
2. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
3. Remove the coolant heater cord from the coolant heater.





4. Loosen the bolt at the coolant heater but do not remove.
5. Remove the coolant heater.
6. Remove and clean any burrs, compound, paint, or rough spots from the core plug hole.

Installation Procedure





1. Apply a coat of Permatex(R) Thread Sealant with Teflon 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 positioned as shown.

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 coolant heater bolt to 2 Nm (17 inch lbs.).

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. Install the coolant heater cord to the coolant heater.
6. Fill the cooling system with engine coolant. Refer to Draining and Filling Cooling System.
7. Inspect for leaks.