GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1998 🢒 Intrigue 🢒 Engine 🢒 Engine Cooling 🢒 Coolant Heater Replacement

Removal Procedure
  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. Object Number: 179498 Size: SH
  3. Disconnect the coolant heater cord from the coolant heater.

    4. Object Number: 179497 Size: SH
  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

    Object Number: 179497 Size: SH
  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. Object Number: 179495 Size: SH
  3. Install the coolant heater so the element is positioned as shown.
  4. Tighten the coolant heater bolt until both locking wings draw tight against the inner wall of the engine block.

    5. Tighten
    Tighten the coolant heater bolt to 2 N·m (18 lb in).


    Object Number: 179498 Size: SH

    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. Connect 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.