Heater-Evaporator Unit Replacement

Heater Unit / Replacement

SRS components are located in this area. Review the SRS component locations, precautions, and procedures in the Supplemental Restraint System before performing repairs or service.

1. When the engine is cool, drain the engine coolant from the radiator.

WARNING: Do not remove the radiator cap when the engine is hot; the engine coolant is under pressure and could severely scald you.







2. Open the clamp, then disconnect the heater valve cable from the heater valve arm.







3. Disconnect the heater hoses from the heater unit.

CAUTION: Engine coolant will damage paint. Quickly rinse any spilled engine coolant from painted surfaces.

NOTE: Engine coolant will run out when the hoses are disconnected, drain it into a clean drip pan.







4. Remove the mounting nut from the heater unit.

NOTE: When removing the mounting nut, take care not to damage or bend the fuel pipes, brake pipes, etc.


5. Remove the dashboard.
6. Remove the heater duct or the evaporator.







7. Remove the two bolts, the nut and the passengers SRS beam.







8. Disconnect the mode control motor connector, and remove the wire harness clip from the heater unit. Remove the two mounting nuts and the heater unit.
9. Install in the reverse order of removal. Make note of these items:
- Apply sealant to the grommets
- Do not interchange the inlet and outlet hoses. Make sure that the hose clamps are secure.
- Loosen the bleed bolt on the engine and refill the radiator and coolant reservoir with the proper engine coolant mixture.
Tighten the bleed bolt when all the trapped air has escaped and engine coolant begins to flow from it.
- Connect all cables and make sure they are properly adjusted.