Removal and installation of the vacuum pump of the diesel engine

Pumping fuel from the vacuum pump

Vacuum pump

The vacuum pump on the diesel engine 1.9 l, 74 kW is also a fuel priming pump.

It is mounted on top, on the rear end of the engine and is driven by a camshaft. Pump gaskets are disposable, so they must be replaced each time the pump is removed.

1. Disconnect from the fuel filter 7 (see fig. Fuel filter for a car with a diesel engine 1.9 l, 74 kW) drain hoses 1 (blue marking) and filing 2 (white marking) fuel.

2. Evacuate the fuel from the vacuum pump. To do this, connect a VAG 1390 hand vacuum pump with a VAG 1390/1 tank to the pump. Pump out fuel until it stops flowing out of hose 2 (see fig. Pumping fuel from the vacuum pump). When doing this, make sure that fuel does not get into the hand vacuum pump.


3. Disconnect from pump 3 (see fig. Vacuum pump) vacuum hose 1 brake booster.

4. Disconnect the fuel supply hose 5 from the pump 3.

5. Turn away bolts 2 fastenings of the pump.

6. Remove the vacuum pump 3 from the block head and, lifting it up, disconnect the fuel drain hose 4 from it.

7. Connect the fuel drain hose 4 to the pump (blue marking) and install pump 3 on the block head.

8. Screw in bolts 2 for fastening the pump and tighten the two upper bolts to 20 Nm, the two lower bolts to 10 Nm.

9. Connect the fuel supply hose 5 to the pump (white marking) and vacuum hose 1.

10. Connect hose 1 (see fig. Pumping fuel from the vacuum pump) fuel supply (white marking) to the fuel filter.

11. Bleed the vacuum pump. To do this, connect a manual vacuum pump with a tank to the fuel drain hose 2 (blue marking). Bleed the vacuum pump until fuel starts to flow out of hose 2, indicating that the vacuum pump is full of fuel.

12. Connect the fuel drain hose 2 to the fuel filter.

Tightening torques, Nm

Upper bolts of fastening of the vacuum pump 20

The lower bolts of fastening of the vacuum pump 10