Some 1983-91 Monteros were equipped with a dual air conditioning system, which has a secondary, rear evaporator.
REMOVAL & INSTALLATION
See Figures 1, 2 and 3
- Have the A/C system discharged by a qualified automotive mechanic.
- Disconnect the negative (-) battery cable from the battery.
- Remove the passenger-side (right-hand side) rear pillar trim. The evaporator is located under this trim piece.
- Remove the liquid line and the suction line connections from the evaporator assembly. Once the lines are removed, cap the hoses or pipes with a blank plug to prevent entry of dust, dirt and water.
- Make certain to discard the old O-rings from the A/C lines and acquire new ones for reassembly.
- Disconnect the upper duct from the top of the rear evaporator assembly.
- Unplug the wiring harness connector.
- Unbolt the mounting bolts and remove the evaporator assembly from the vehicle. Be careful, the evaporator will still have some coolant inside; do not spill it in the vehicle.
- To install the rear evaporator, set it in place in the vehicle.
- Secure it in place with the mounting bolts and plug the wiring harness connector back together.
- Install the upper duct into the top of the evaporator.
- Apply a coating of compressor oil (DENSO OIL 6 or SUNISO 5GS) to the new O-rings and place them in position in the liquid and suction lines. Refer to the refrigerant line procedure in this section for specifics.
- Bolt the lines tightly to the evaporator.
- Reinstall the rear pillar trim and connect the negative (-) battery cable to the battery.
- Have the A/C system evacuated and charged by a certified mechanic.