Volkswagen Workshop Service and Repair Manuals > Polo Mk4 > Heating, ventilation, air conditioning | Heating, air conditioning | Heating | Heat exchanger - remove and install | Heat exchanger (Behr box) - remove and install

Installation

Installation is performed in reverse sequence to the removal, observing the following:

WARNING

Observe the correct assembly position of the heat exchanger with respect to the lower part of the plenum chamber.

Assembly position for the heat exchanger:

–	Position the heat exchanger in lower part of plenum chamber so that marks -A- and -a- (larger) COINCIDE, and do the same with marks -B- and -b- (smaller).

Note

The heat exchanger must be assembled correctly to prevent water infiltration into the vehicle.

–	Screw on the fastening screw -5- with torque of (20 Nm).

–	Observe seal installation position -4- and heat exchanger hose position → Chapter.

Note

After removal or replacement of heat exchanger, cooling system will have air; to remove air, proceed as follows:

–	Start the engine and keep it at 2500 rpm speed until coolant level in tank lowers due to opening of thermostat valve (the air that was in the heat exchanger is moved to the coolant tank , causing coolant level there to decrease).

–	Top up coolant tank level → Engine; Rep. gr.19.

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