Heater Core: Service and Repair

Heater Core Replacement

Removal Procedure

1. Drain the engine coolant.
2. Remove the heater outlet hose from the heater core.
3. Remove the heater inlet hose from the heater core.
4. Remove the instrument panel retainer.
5. Remove the shift control bracket. Bracket Replacement in Manual Transmission -- Getrag 5, Transmission Control Bracket Replacement in Automatic Transaxle -- AF33-5, or Transmission Control Bracket Replacement in Automatic Transmission -- VT25-E.





6. Remove the heater duct screws.
7. Remove the heater duct.





8. Remove the heater core cover screws.
9. Remove the heater core cover.





10. Remove the heater core pipe cover screw.
11. Remove the heater core pipe cover.
12. Remove the heater core pipe foam seal.





13. Grasp the heater core at end tanks and remove heater core. Spray the perimeter of the heater core seal and the heater core pipes at the front of dash with a soap and water mixture to ease removal.

Installation Procedure





1. Install the heater core. Spray the perimeter of the heater core seal and the heater core pipes at the front of dash with a soap and water mixture to ease installation.





2. Install the heater core pipe seal.
3. Install the heater core pipe cover.
4. Install the heater core pipe cover screw.

Tighten
Tighten the screw to 1 N.m (9 lb in).





5. Spray the front of dash seal at the drain tube opening to aid in heater core cover installation.





6. Install the heater core cover.
7. Install the heater core cover screws.

Tighten
Tighten the screw to 1 N.m (9 lb in).





8. Install the heater duct.
9. Install the heater duct screws.

Tighten
Tighten the screw to 1 N.m (9 lb in).

10. Install the instrument panel retainer.
11. Install the shift control bracket. Refer to Transmission Shift Control Bracket Replacement in Manual Transmission -- Getrag 5, Transmission Control Bracket Replacement in Automatic Transaxle -- AF33-5, or Transmission Control Bracket Replacement in Automatic Transmission -- VT25-E.
12. Install the heater inlet hose to the heater core.
13. Install the heater outlet hose to the heater core.
14. Replace the engine coolant.