Heater Core

HEATER CORE REPLACEMENT

TOOLS REQUIRED
J 38185 Hose Clamp Pliers

REMOVAL PROCEDURE
1. Drain the coolant. Refer to Draining and Filling Cooling System (L26 Static Fill) Draining and Filling Cooling System (LY7 Static Fill) Draining and Filling Cooling System (L26, LY7, GE 47716 Fill) in Cooling System.
2. Use J 38185 in order to position aside the heater hose inlet and outlet clamps at the heater core.
3. Disconnect the inlet and outlet heater hose from the heater core.
4. Remove the RH instrument panel closeout/insulator panel.
5. Remove the LH instrument panel closeout/insulator panel.
6. Remove the floor carpet.
7. Remove the communication interface module.
8. Remove the rear floor air outlet duct from the holes in the floor reinforcement.
9. Disconnect the rear floor air outlet duct from the heater core outlet cover.
10. Remove the rear floor air outlet duct.




11. Remove the heater core outlet cover screws (2).
12. Remove the heater core outlet cover heat stakes (1) with a small chisel.
13. Remove the heater core outlet cover from the HVAC module assembly.




14. Remove the heater core cover screws (2).
15. Remove the heater core cover heat stakes (1) with a small chisel.
16. Remove the heater core cover from the HVAC module assembly.




17. Remove the heater core from the HVAC module assembly.




18. Remove the heater core foam seal (1) from the HVAC module assembly.

INSTALLATION PROCEDURE




1. Install a new heater core foam seal (1) to the HVAC module assembly.
2. Install the heater core to the HVAC module assembly.
3. From the inside of the heater core cover, drill the dimples adjacent to the heat stakes using a 5.5 mm (7/32 in) drill bit.




4. Install the heater core cover.
5. Install the heater core cover screws to the heater core cover.

Tighten all the screws to 1.5 N.m (13 lb in).

NOTE: Refer to Fastener Notice in Service Precautions.

6. From the inside of the heater core outlet cover, drill the dimples adjacent to the heat stakes using a 5.5 mm (7/32 in) drill bit.




7. Install the heater core outlet cover.
8. Install the heater core outlet cover screws (2).

Tighten the screws to 1.5 N.m (13 lb in).

9. Connect the rear floor air outlet duct to the heater core outlet cover.
10. Install the rear floor air outlet duct to the holes in the floor reinforcement.
11. Install the communication interface module.
12. Install the floor carpet.
13. Install the RH instrument panel closeout/insulator panel.
14. Install the RH instrument panel closeout/insulator panel.
15. Connect the inlet and outlet heater hose to the heater core.
16. Use J 38185 in order to reposition the heater hose inlet and outlet clamps to the heater core.
17. Refill the coolant. Refer to Draining and Filling Cooling System (L26 Static Fill) Draining and Filling Cooling System (LY7 Static Fill) Draining and Filling Cooling System (L26, LY7, GE 47716 Fill) in Cooling System.