GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1997 🢒 Catera 🢒 Engine 🢒 Engine Controls - 3.0L 🢒 Coolant Heater Replacement

Removal Procedure
  1. Remove the right side radiator cover.

    2. Unscrew the self-locking tab and unclip from body.

  2. Remove the intake air resonator intake hose clamp and air intake hose from air the cleaner housing.
  3. Remove the air cleaner housing.
    4. 3.1. Remove the cover.
    3.2. Remove the element.

    Object Number: 159417 Size: SH
    3.3. Unseat from the inner grommet (1) then from the outer grommets (2).
  4. Cut the plastic tie-wrap that is used to secure engine block heater power supply cord to vehicle body.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    6. Object Number: 231214 Size: MH
  6. Remove the exhaust manifold lower heat shield bolts.
  7. Remove the engine block heater.

    8. Object Number: 231222 Size: SH
  8. Note routing of engine block heater power supply cord (1).

Installation Procedure

    Object Number: 231214 Size: MH
  1. Install the engine block heater.

    2. Object Number: 231222 Size: SH
  2. Route the engine block heater power supply cord to prevent contact with hot surfaces and the areas that may wear and or pinch the cord.

    3. Object Number: 231214 Size: MH
  3. Coat the exhaust manifold lower heat shield bolts with high temperature anti-seize compound GM P/N 5613695 or equivalent and install the exhaust manifold lower heat shield bolts.

    4. Tighten
    Tighten the exhaust manifold lower heat shield bolts to 8 N·m (71 lb in). Refer to

    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.

    in General Information.

  4. Lower the vehicle.
  5. Secure the engine block heater power supply cord to the vehicle body with a plastic tie-wrap.

    6. Object Number: 159417 Size: SH
  6. Install the air cleaner housing and seat the housing onto outer the grommets (2) and then to the inner grommet (1).
  7. Install the element.
  8. Install the cover.
  9. Install the intake air resonator intake hose and air intake hose clamp to air cleaner housing.
  10. Install the right side radiator cover.

    11. Clip to body and secure with self-locking tab.