GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Lumina 🢒 Engine 🢒 Engine Cooling 🢒 Coolant Heater Replacement

Removal Procedure

    Object Number: 457845 Size: SH
  1. Drain 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. Disconnect the engine block heater cord from the engine block heater.
  4. Loosen the engine block heater bolt. Do not remove the engine block heater bolt.
  5. Remove the engine block heater.
  6. Clean the engine block heater opening.

Installation Procedure

    Object Number: 457845 Size: SH
  1. Coat the following components with the lubricant GM P/N 12345996 or the equivalent:
    2. • The engine block heater seal
    • The cleaned surface of the engine block heater hole

    Object Number: 296172 Size: SH
  2. Install the engine block heater. Position the engine block heater element at the 3 o'clock position (2), as shown.

    3. Final installed position between 2 o'clock (1) and 4 o'clock (3) is acceptable.

    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.

  3. Tighten the engine block heater bolt.

    4. Tighten
    Tighten the engine block heater bolt to 2 N·m (18 lb in).

  4. Connect the engine block heater cord to the engine block heater.
  5. Lower the vehicle.
  6. Fill the cooling system. Refer to Cooling System Draining and Filling .
  7. Inspect for leaks.