Withdrawal
Unlock the service cover from the inside. Unlock the hood and pull it forward a little. Remove the hood and lay it with the side protected by the cover down. Detach hose -1- from mounting. Remove engine cover. Remove fuel supply line -2- (white marking) with a tandem pump. Remove fuel return line -1- (blue marking) from the fuel line.
Insert suitable adapter from hand vacuum pump -VAG 1390- into return hose. Connect adapter with hose and bleeder container -VAG 1390/1-. Connect hand vacuum pump -VAG 1390- with bleeder container -VAG 1390/1- to fuel drain hose. Press the hand vacuum pump until no more fuel comes out of the drain hose. Ensure that no fuel enters the hand vacuum pump.
Detach fuel return line -1- from tandem pump. Detach vacuum hose -2- from tandem pump. Remove bolts -arrows-. Remove tandem pump -3- from cylinder head.
Installation
Installation in reverse order. In this case, the seals of the tandem pump must be replaced. Secure all hose connections with clamps. Ensure that the tandem pump catch is correctly positioned in the camshaft.
Install tandem pump and tighten fixing bolts -upper arrows- to 20 Nm. Tighten fixing bolts -lower arrows- to 10 Nm. Attach all hoses to the tandem pump.
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