Unfasten coolant expansion tank cap to dissipate pressure in coolant circuit.
–
Detach coolant expansion tank from vehicle (auxiliary heater is installed horizontally between engine and left longitudinal member).
–
Pinch off coolant hoses -A- (from engine/coolant shut-off valve to auxiliary heater) and -B- (from auxiliary heater to heat exchanger of air conditioner unit/heater) using, for example, hose clamps up to Ø 25 mm -VAS 3094-.
–
Mark positions of coolant hoses -A- and -B- with respect to circulation pump -V55-.
–
Detach coolant hoses -A- and -B- from circulation pump.
–
Unplug connector -C- from circulation pump -V55-.
–
Remove circulation pump -V55--D- downwards from holder.