Heater Core: Service and Repair

REMOVAL

WARNING:
- ON VEHICLES EQUIPPED WITH AIR-BAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
- REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT BEFORE PERFORMING THE FOLLOWING OPERATION.

1. Remove the heater housing.
2. Disassemble the HVAC housing to access the heater core.

HVAC Housing:

3. Lift the heater core out of the lower half of the HVAC housing.
4. If necessary, remove the three heater core tube retaining bolts and the heater core tube assembly from the heater core.
5. Remove the heater core tube seals and discard as required.

INSTALLATION
1. If the heater core tube assembly was removed from the heater core, lubricate two new rubber O-ring seals with clean engine coolant and install them onto the heater core fitting.
2. If required, connect the heater core tube assembly to the heater core and install the three retaining bolts. Tighten the bolts to 5 Nm (45 in. lbs.).
3. Install the heater core into the bottom half of the HVAC housing.
4. Assemble the HVAC housing.
5. Install the HVAC housing.