Audi Workshop Service and Repair Manuals

Removing and installing coolant pipe (front) Special tools and workshop equipment required

t  Removal lever -80 - 200-

t  Hose clip pliers -VAS 6362-

Removing –  Drain coolant → Chapter. –  Remove air cleaner housing → Rep. gr.23. Vehicles with thermostat: –  Remove oil filter bracket with engine oil cooler → Chapter.

Country-specific version (cold climates): –  Unplug electrical connector -2-. All vehicles (continued): –  Press release tabs and disconnect crankcase breather hose -1-. –  Disconnect vacuum hose -arrow-. –  Remove bolt -3-, swivel air pipe with connection to rear and detach from turbocharger.   Note Disregard -item 4-.

–  Unclip wiring harness from retainer -arrow-.

Vehicles with thermostat: –  Move clear wiring harnesses -arrows- and electrical connector -1- at bracket.

–  Release hose clips -1 and 2- and remove air hose.

–  Remove bolts -arrows-.   Note Depending on version, bolt (top right) may not be fitted. –  Using removal lever -80 - 200-, move clear electrical wiring and hoses at air pipe (left-side). –  Loosen hose clip -1- and detach air pipe (left-side).

–  Release hose clips -1-, detach coolant hoses and move clear.   Note Disregard -items 2, 3, 4-.

Vehicles with 4/2-way valve: –  Take electrical connector -1- for Hall sender -G40- out of retainer. –  Detach bracket from coolant pipe (front). –  Release hose clips -2- and -3- and disconnect coolant hoses. –  Remove bolts -arrows- and detach coolant pipe (front) from 4/2-way valve to left side.

Vehicles with thermostat: –  Remove electrical connector -2- for Hall sender -G40- from bracket and unplug connector. –  Detach bracket from coolant pipe (front). –  Release hose clips -1- and -3- and detach coolant hoses. –  Remove bolts -arrows- and detach coolant pipe (front) from left side of cylinder block. Installing Installation is carried out in the reverse order; note the following: l  Tightening torques → Chapter „Coolant pipes, coolant temperature senders, pump for exhaust gas recirculation cooler - 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 surface for O-ring. –  Lightly lubricate O-ring with coolant and slide O-ring onto coolant pipe (front). –  Push coolant pipe (front) into cylinder block. –  Install air hoses with screw-type clips → Fig.. –  Install air pipe → Chapter. –  Install air pipe with connection → Chapter. –  Install oil filter bracket with engine oil cooler → Chapter. –  Install air cleaner housing → Rep. gr.23. –  Fill up with coolant → Anchor.