Heater Core: Service and Repair
Heater Core Replacement
Removal Procedure
Note: Depressurize cooling system by opening and re-closing closure cap on coolant compensation tank.
1. Drain the coolant.
Collect the coolant in a drip pan.
2. Remove the blower module drain hose (1).
Remove the 2 bolts.
Note: Mark the coolant hose (3) and connection (2) before removal to avoid confusion when refitting.
3. Disconnect the 2 coolant hoses.
Release the 2 quick-release fittings.
4. For vehicles equipped with the heater housing insulator, remove the air inlet screen (1).
5. For vehicles equipped with the heater housing insulator, remove the windshield wiper arms (2).
6. Remove the 2 covers.
Remove the 2 nuts.
7. Remove the 2 washers.
8. Remove the 2 wiper arms from the shaft.
Note: Carefully release the clips from the dash bracket from inside outward.
9. For vehicles equipped with the heater housing insulator, remove the air inlet screen (1).
1. Lift the air inlet screen in the dash area.
2. Release the 5 clips (3).
3. Remove the hose (2) for the windshield washer system.
10. For vehicles equipped with the heater housing insulator, detach the air duct housing from the dash outside.
Remove the 8 bolts.
11. Remove the front floor console. Refer to Front Floor Console Replacement (Service and Repair).
12. For vehicles equipped with air conditioning (A/C), remove the air duct rear footwell (1).
13. Remove the front floor console bracket right.
14. Detach and remove the heater core cover.
Remove the 8 bolts (1, 2).
15. For vehicles equipped with the heater housing insulator, remove the insulator.
16. Remove the heater core with heater pipes.
17. Detach the heater pipes.
Detach the 2 heater pipes.
Installation Procedure
1. Install the heater pipes to the heater core.
Replace the 2 sealing rings.
Note: With the aid of an assistant, guide the heater pipes through the splash panel.
2. Insert the heater core.
Note: Only on vehicles with insulator.
3. For vehicles equipped with an insulator, install the insulator.
Caution: Refer to Fastener Caution (Fastener Caution).
4. Install the heater core cover.
Tighten the 8 bolts to 6 Nm (53 lb in).
5. Install the right center console bracket.
Tighten the 2 bolts to 13 Nm (113 lb in).
6. Install the air duct rear footwell.
7. Install the front floor console. Refer to Front Floor Console Replacement (Service and Repair).
8. For vehicles equipped with an insulator, attach the air duct housing to the dash outside.
Tighten the 8 bolts to 6 Nm (53 lb in).
9. For vehicles equipped with an insulator, fit the air inlet screen.
1. Attach the screen washer hose.
2. Clip in the 5 clips.
Note: Ensure the windshield wiper arms are correctly positioned.
10. For vehicles equipped with an insulator, install the windshield wiper arms.
1. Install the 2 wiper arms to the shaft.
2. Install the 2 washers.
Tighten the 2 nuts to 17 Nm (13 lb ft).
3. Install the 2 cover caps.
11. For vehicles equipped with an insulator, install the air inlet screen.
Note: The following installation sequence must be observed.
12. Install the coolant hoses to heater core.
1. Slide the 2 locks on the quick-release fittings in the arrow direction up to the stop.
2. Plastic rings (green) are covered.
3. Install the 2 quick-release fittings on the heater core (1) connections up to the stop.
4. Note the markings applied. Slide the 2 locks (3) on the quick-release fittings in the arrow direction up to the stop.
5. Plastic rings (green) must be visible.
6. Inspect the correct seat of quick-release fittings and visibility of the plastic rings (arrows).
13. Install the drain hose.
Tighten the 2 bolts to 5 Nm (44 lb in).
14. Fill and bleed the cooling system. Refer to Cooling System Draining and Filling (Service and Repair).
Note: Inspect for leaks with utmost care as hot coolant will escape into the drivers footwell if there are leaks in coolant connections at the heater core.
15. Inspect the coolant system for leaks. Refer to Cooling System Leak Testing (Component Tests and General Diagnostics).