For 1990-2009 cars

### Removal Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Disconnect the heater hoses from the heater core pipes:

• | Raise the air inlet screen on the passenger side and open the access door near the pollen filter.

• | Squeeze the tabs on the locking collar and pull back on the sleeve to unlock.

• | Carefully pull back the tabs to remove the disconnects.

• | Discard the green assembly markers (1) if attached.

3. Remove the IP carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages and Console.
4. Remove the SIR mounting bracket bolts.
5. Remove the SIR mounting bracket.
6. Remove the IP support bracket bolts.
7. Remove the IP support bracket.
8. Remove the blower motor housing screws.
9. Remove the blower motor housing with the motor.
10. Remove the heater core pipe bracket screw.
11. Remove the heater core pipe bracket.
12. Remove the heater core inlet and outlet pipe retaining bracket screw.
13. Remove the heater core inlet and outlet pipes.
14. Remove the heater core retaining screw.
15. Remove the heater core with the rubber seal:

• | Protect the surrounding interior trim and carpeting from coolant spills.

• | Plug the heater core ports.

• | Remove the heater core (2).

• | Remove the rubber seal (1) from the cavity.

### Installation Procedure

1. Install the rubber seal (1) into the heater core cavity.
2. Install the heater core (2).

Use caution to avoid damage to the fins.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the heater core retaining screw.

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

4. Install the heater core inlet and outlet pipes:

• | Use new O-rings.

• | Lightly lubricate the O-rings with coolant.

5. Install the heater core inlet and outlet pipe retaining bracket screw.

Tighten
Tighten the screw to 5 N·m (44 lb in).

6. Install the heater core pipe bracket.
7. Install the heater core pipe bracket screw.

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

8. Install the blower motor housing with the motor.
9. Install the blower motor housing screws.

Tighten
Tighten the screws to 4 N·m (35 lb in).

10. Install the IP support bracket.
11. Install the IP support bracket bolts.

Tighten
Tighten the bolts to 22 N·m (16 lb ft).

12. Install the SIR mounting bracket.
13. Install the SIR mounting bracket bolts.

Tighten
Tighten the bolts to 16 N·m (12 lb ft).

14. Install the IP carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages and Console.
15. Install the heater hose quick connects to the heater core pipe connections:

• | Discard green assembly marker (1) if not attached to the quick connect.

• | Inspect that the quick connects are fully seated.

• | Squeeze the locking tabs (2) and push the retaining sleeve (3) into the locked position.

• | Close the access door near the pollen filter and lower the air inlet screen on the passenger side.

16. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.