Audi Workshop Service and Repair Manuals

Removing and installing thermostat Special tools and workshop equipment required

t  Hose clip pliers -V.A.G 1921-

t  Drip tray for workshop hoist -VAS 6208-

Removing –  Remove bonnet → Chapter. –  Take off engine cover panel -arrows-. –  Remove noise insulation located below (detach crankcase breather hose).   Note

Collect drained coolant in a clean container for re-use or disposal.   WARNING Hot steam or hot coolant can escape when expansion tank is opened; cover filler cap with cloth and open carefully. –  Open filler cap -arrow- on coolant expansion tank.

–  Remove noise insulation -arrows-.

–  Place drip tray for workshop hoist -VAS 6208- under engine. –  Disconnect coolant hose (bottom) at radiator -arrow- and drain off coolant.

–  Remove bottom bolt -bottom arrow- for hose connection.

–  Pull oil dipstick out of guide tube. –  Remove guide tube -1- for oil dipstick. –  Pull oil filler pipe -2- off oil filler reservoir.

–  Remove top bolt -top arrow- for hose connection. –  Turn thermostat clockwise through approx. 90° (1/4 turn) and remove thermostat from hose connection. –  Remove O-ring.

Installing Installation is carried out in the reverse order; note the following:   Note Renew O-ring. –  Clean and smoothen sealing surface for O-ring as required. –  Insert thermostat -3- with new O-ring -2- into hose connection -1-. l  When inserting, the cross-piece on the thermostat should be horizontal as shown in the illustration.

–  Lubricate O-ring -2- with coolant additive “G12+”. –  Turn thermostat anti-clockwise -arrow- through approx. 90° (1/4 turn). –  Fill cooling system → Anchor. Tightening torques

Component	Nm
Hose connection to cylinder block	15
Guide tube for oil dipstick to oil filter bracket	10