Air Door: Service and Repair

Doors

Windshield Defroster


Removal

1. Remove the heater air plenum chamber from vehicle as outlined.

2. Through the floor air distribution opening, pull the windshield defroster door from the crank arm and remove the windshield defroster door from the heater air plenum chamber.







Item Part Number Description
1 18471 Heater Air Plenum Chamber
2 18A317 Vacuum Control Motor
3 18C433 Heater Outlet Floor Duct
4 389975-S2 Nuts
5 18A478 Windshield Defroster Door
6 - Windshield Defroster Door Crank Arm


Installation

1. Position the windshield defroster door in the heater air plenum chamber and position the windshield defroster door to the crank arm.

2. Through the floor air distribution opening, install one screw to retain the windshield defroster door to the crank arm.

3. Check the windshield defroster door for freedom of movement. Correct any existing sticking, binding or grabbing condition.

4. Install the heater air plenum chamber in the vehicle as outlined.

5. Check the system for proper operation.


Heater Air Damper


Removal

1. Remove the heater air plenum chamber from the vehicle as outlined.

2. Remove the sleeve nut retaining the vacuum motor arm to the heater air damper door.

3. Remove two screws retaining door hinge to heater air plenum chamber upper half.

4. Drill and remove two rivets retaining the heater air damper door hinge to the heater air plenum chamber lower half.

5. Remove the heater air damper door from the heater air plenum chamber through the dash panel inlet opening.









Installation

1. Position the heater air damper door into the heater air plenum chamber through the dash panel inlet openings.

2. Install two screws to retain heater air damper door hinge to heater air plenum chamber upper half.

3. Either pop-rivet or install two screws and nuts to retain the panel door hinge to the heater air plenum chamber lower half.

4. Check the door for alignment and freedom of movement. Correct any existing sticking, binding or grabbing condition.

5. Connect the vacuum motor arm to the heater air damper door with a new sleeve nut.

6. Install the heater air plenum chamber in the vehicle.

7. Check the system for proper operation.


Heater and A/C Inlet Duct


Removal

1. Remove the A/C recirculating air duct as outlined.

2. Remove one screw retaining the heater and A/C air inlet duct door to the door crank arm.

3. Pull the heater and A/C air inlet duct door from the crank arm and remove the heater and A/C air inlet duct door from the A/C recirculating air duct.








Installation

1. Position the heater and A/C air inlet duct door in the A/C recirculating air duct through the dash panel inlet opening.

2. Install one screw to retain the heater and A/C air inlet duct door to the crank arm.

3. Check the heater and A/C air inlet duct door for freedom of movement. Correct any existing sticking, binding or grabbing condition.

4. Install the A/C recirculating air duct in the vehicle as outlined.

5. Check the system for proper operation.