Skoda Workshop Service and Repair Manuals

Removing and installing heat exchanger Special tools and workshop equipment required t  Hose clamp -MP 7-602- t  Hose clamp -T30096- t  Pneumatic gun, commercially available Removing –  On vehicles with air conditioning system, switch on the ignition and set the highest possible temperature. –  Switch off the ignition and all electrical components.   DANGER! The coolant temperature can be over 100 °C when the engine is warm. The cooling system is under pressure - risk of scalding! Before repairs, reduce pressure and temperature if necessary.

–  Pinch off coolant hose -1- with the hose clamp -MP 7-602-. –  Pinch off coolant hoses -2- and -3- with hose clamp -T30096-.   Note If the heat exchanger is replaced, the coolant must be replaced. In this case let the coolant drain → Engine → Rep. gr.19, without pinching off the coolant hoses. –  Separate the quick couplings at the heat exchanger.

–  Place the hose -1- a little onto the upper connection. –  Hold a container -2- below the lower connection -3-. –  Carefuly blow with a pneumatic gun the remaining coolant out of the heat exchanger into the container -2-.

–  Unscrew screw -1- between the heat exchanger connections (hexagon; 6 mm). –  Remove the side cover of the centre console on the left side → Body Work → Rep. gr.68. –  Remove left footwell vent → Chapter.

–  Unscrew screws -1- and remove the heat exchanger trim panel. –  Cover the floor covering in the area below the heat exchanger with a liquid impermeable foil and absorbent paper.

–  Open the hose clamps -1- and pull the coolant pipes out of the heat exchanger. –  Remove the heat exchanger out of the heater unit. Install Installation is performed in the reverse order, pay attention to the following points:

–  Moisten gasket rings -2- with coolant before installing. –  Insert new gasket rings in the connections -3- of the heat exchanger. –  Press the coolant pipes -1- into the connections -3-.

–  Push the hose clamps -1- over the connection point. They must easily turn on the coolant pipes/flange-heat exchanger. –  Hose clamps -1- must be attached as shown in the fig. –  Tighten hose clamps -1- to 1.5 Nm.   Note t  Always replace the gasket rings. t  In case of deformation of the hose clamps, these must be replaced. t  Replace coolant after changing the heat exchanger.

–  Screw in screw -1- between the heat exchanger connections.    Make sure that the screw engages into the provided hole, if necessary press flange into the direction of the centre of the vehicle.