Audi Workshop Service and Repair Manuals

Removing and installing tandem pump

Special tools and workshop equipment required

t	Hand-operated vacuum pump with attachments -V.A.G 1390- or diesel extractor -VAS 5226-

t	Bleeder container -V.A.G 1390/1-

t	Hose clip pliers -V.A.G 1921-

t	Audi A2 engine cover protector -VAS 6011-

Removing Observe rules for cleanliness → Chapter. –  Wash outer side of bonnet and dry with chamois leather. –  Release service flap from inside the vehicle. –  Release bonnet -arrows- and pull it forwards slightly.

–  Attach Audi A2 engine cover protector -VAS 6011- to bonnet.   Note

Do not store bonnet in upright position. –  Remove bonnet and put aside with the protective cover facing downwards.

–  Disengage hose -1- from retainer. –  Take off engine cover panel -arrows-.   WARNING t  In extreme cases the fuel lines and the fuel can reach a temperature of 100 °C on vehicles with unit injector engine. Allow the fuel to cool down before disconnecting the lines - danger of scalding. t  Wear protective gloves. t  Wear safety goggles.

–  Disconnect fuel supply hose -2- (white marking) from tandem pump. –  Disconnect fuel return hose -1- (blue marking) from fuel pipe.

–  Insert a suitable adapter from the hand-operated vacuum pump -V.A.G 1390- into the short length of hose on the return pipe. –  Connect adapter with short length of hose and bleeder container -V.A.G 1390/1-. –  Connect hand-operated vacuum pump -V.A.G 1390- with bleeder container -V.A.G 1390/1- to return hose. –  Operate hand-operated vacuum pump until no more fuel comes out of return hose. Make sure no fuel is sucked into hand-operated vacuum pump.   Note Instead of hand-operated vacuum pump -V.A.G 1390- with bleeder container -V.A.G 1390/1-, you can also use diesel extractor -VAS 5226-.

–  Disconnect fuel return hose -1- from tandem pump. –  Disconnect vacuum hose -2- from tandem pump. –  Unscrew bolts -arrows-. –  Detach tandem pump -3- from cylinder head. Installing Installation is carried out in the reverse order; note the following:   Note t  Renew tandem pump gaskets. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Parts catalogue. t  Ensure proper seating of tandem pump actuator in camshaft.

–  Install tandem pump and tighten securing bolts -top arrows- to 20 Nm. –  Tighten securing bolts -bottom arrows- to 10 Nm. –  Connect all hoses to tandem pump.