Coolant Heater Replacement 3.5L V6 LX5 Left

1. Raise the vehicle.
2. Disconnect the left (front) coolant heater cord at the left (front) coolant heater.



3. Remove the left (front) coolant heater retaining bolt.
4. Remove the left (front) coolant heater.

Important: Align the threaded hole in the engine block with the hole labeled L (2) on the left (front) coolant heater.

1. Install the left (front) coolant heater.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the left (front) coolant heater retaining bolt.

Tighten
Tighten the left (front) coolant heater bolt to 9 N·m (80 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.

3. Connect the left (front) coolant heater cord to the left (front) coolant heater.
4. Lower the vehicle.

Coolant Heater Replacement 3.5L V6 LX5 Right

1. Raise the vehicle.
2. Disconnect the right (rear) coolant heater cord at the right (rear) coolant heater.



3. Remove the right (rear) coolant heater retaining bolt.
4. Remove the right (rear) coolant heater.

Important: Align the threaded hole in the engine block with the hole labeled R (1) on the right (rear) coolant heater.

1. Install the right (rear) coolant heater.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

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.

2. Install the right (rear) coolant heater retaining bolt.

Tighten
Tighten the right (rear) coolant heater bolt to 9 N·m (80 lb in).




3. Connect the right (rear) coolant heater cord to the right (rear) coolant heater.
4. Lower the vehicle.

Coolant Heater Replacement 3800 V6 L36

1. Drain the engine coolant from the cooling system. Refer to Cooling System Draining and Filling .
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.



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.

1. Apply a coat of Permatex® 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: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

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

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