S5 Quattro Coupe V8-4.2L (CAUA) (2009)
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Remove the plenum chamber front wall - A - on vehicles equipped with a 6 Cylinder TDI engine.
‹› On vehicles with a gasoline engine or a 4 Cylinder On the TDI engine, the plenum chamber front wall cannot be loosen or removed from the
vehicle, there is not enough space available.
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Remove the expansion valve. Refer to => [ Expansion Valve ] See: Compressor HVAC/Service and Repair.
‹› Seal open pipe connections.
‹› Uses the caps from the replacement evaporator to seal the open connections on the evaporator.
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Remove the expansion valve mounting plate - A - from the refrigerant lines - B - and - C - (so that it does not get lost while removing).
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Coat the inner side of the grommet - D - with grease and remove the supporting ring - E -.
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Loosen the grommet - D - from the plenum chamber rear wall toward the passenger compartment (it is removed and installed with the A/C unit).
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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).
