Audi Workshop Service and Repair Manuals

Removing and installing thermostat housing and coolant pipe (rear) Special tools and workshop equipment required

t  Hose clip pliers -VAS 6362-

Removing –  Drain coolant → Chapter. –  Remove air cleaner housing → Rep. gr.24.

–  Release hose clips -arrows- and detach coolant hoses. –  Move clear electrical wiring harness -1-.

–  Unplug electrical connector -2- at coolant temperature sender -G62-. –  Pull off retaining clip -3-. –  Remove bolts -arrows- and move bracket -1- clear to one side. –  Detach thermostat housing from rear coolant pipe.

–  Release hose clip -arrow- and disconnect coolant hose from rear coolant pipe.

–  Detach rear coolant pipe -1- from cylinder block -3-. Installing l  Tightening torques → Chapter „Housing for thermostat with rear coolant pipe - exploded view“   Note t  Renew gaskets, seals and O-rings. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue. –  Clean and smoothen sealing surfaces for seal -2-. –  Lubricate seal lightly with coolant.

–  After securing thermostat housing, move coolant pipe up against housing as far as stop and only then insert retaining clip -arrow-. –  Check that coolant pipe is firmly secured in thermostat housing. Remaining installation steps are carried out in reverse sequence; note the following: –  Install air cleaner housing → Rep. gr.24. –  Fill up with coolant → Anchor.