S5 Quattro Coupe V8-4.2L (CAUA) (2009)
‹› Due to space limitation when the instrument panel is installed, it is not possible to reinstall the factory-installed heat exchanger and clamps - B -
and - C -. If a factory installed heat exchanger must be reinstalled, remove the instrument panel and the air guide leading to the "Defrost" vent.
Install the O-ring seals, lightly coated with coolant, (as described for installing an exchange part - heat exchanger) on the coolant pipes - D - and -
E - , and press the coolant pipes - D - and - E - (with the O-ring seals) from the top into the connections on the heat exchanger - A -. Hold the
coolant pipes - D - and - E - in the heat exchanger and install the clamps - B - and - C -. Further assembly is performed as described for installing a
replacement part - heat exchanger.
Removing
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Perform the preparation work for removing the heat exchanger. Refer to => [ Heat Exchanger, Preparing for Removal ]
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Release pressure in cooling circuit by opening cap on coolant expansion tank.
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Mark the arrangement of coolant hoses - A - (supply to Cylinder head) and - B - (return to water pump).
‹› The heat exchanger is designed for a specific coolant flow direction. Therefore, coolant hoses must be connected on the correct sides.