Audi Workshop Service and Repair Manuals

Removing and installing actuator for engine temperature regulation -N493- Removing –  Remove toothed belt for coolant pump → Chapter.   WARNING Hot steam/hot coolant can escape - risk of scalding. t  The cooling system is under pressure when the engine is hot. t  Cover filler cap on coolant expansion tank with a cloth and open carefully to dissipate pressure. –  Drain coolant → Chapter.

–  Unplug electrical connector -1- at throttle valve module -J338-. –  Remove bolts -arrows- and detach throttle valve module -J338-.

–  Lift retaining clips and disconnect coolant hoses -1 ... 3-.

–  Unplug electrical connector -arrow- from actuator for engine temperature regulation -N493-. –  Remove bracket for electrical connector -1-.

–  Remove bolts -1 ... 5-. –  Detach actuator for engine temperature regulation -N493- from centring pins and pull actuator off engine oil cooler.   Note Disregard -arrow-. Installing l  Tightening torques → Chapter „Actuator for engine temperature regulation -N493-, coolant pump - exploded view“ Installation is carried out in the reverse order; note the following:   Note Renew gaskets and O-rings.

–  Lubricate O-rings -4- with coolant, for coolant refer to → Electronic parts catalogue. –  Check whether the two centring pins are fitted in the cylinder block; install if necessary. –  Fit connecting piece -2- into engine oil cooler -1-. –  Push actuator for engine temperature regulation -N493--3- onto connecting piece and centring pins in cylinder block.

–  Tighten bolts for actuator for engine temperature regulation -N493- → Fig..   Note Detach protective cap -arrow- if a new coolant pump has been fitted. –  Install toothed belt for coolant pump → Chapter. –  Install throttle valve module -J338- → Rep. gr.24. –  Fill up with coolant → Anchor.