Auxiliary Air Conditioning system

Removing And Installing Heat Exchanger

Tools







Preliminary work

1. Drain engine coolant.
2. Remove rear side trim panel.

Removing heat exchanger












1. Press together the air duct from above and pull out of the air-conditioning unit -arrow-.







2. Unscrew the fastening screws -1- and tilt the auxiliary air-conditioning unit inwards on the top side.
3. Remove both servo motors for air flow.







4. Press together the spring band clamps with the circlip pliers for spring band clamps, Cayenne hose connections 72-1-arrows A- and pull off the coolant hoses from the heat exchanger -arrows B-.







5. Unscrew fastening screws -2- and open the upper housing section -arrow A-.
6. Take out heat exchanger -arrow B-.

Installing heat exchanger

NOTE: Both foam seals position the evaporator under a slight pre-load in the housing. To ensure the correct pre-load, any damaged foam seal must be replaced.







1. Insert heat exchanger into housing -arrow A-.
2. Fold up upper housing section -arrow B- and screw down with the fastening screws -2-. Tightening torque 1 ftlb.







3. Push the coolant hoses onto the heat exchanger -arrows A- and attach with the spring-band clamps -B-.
4. Install both servo motors for air flow.







5. Tilt in the auxiliary air-conditioning unit on the top side -arrows and screw down with the fastening screws -1-. Tightening torque 6 ftlb.







6. Push the air duct into the auxiliary air-conditioning unit -arrow- until the air duct is felt to engage.

Subsequent work

1. Install rear side trim panel.
2. Top up engine coolant.