Removing
Note.
- When working on the power supply system, safety precautions must be observed.
- When working on the power supply system, cleanliness rules must be observed.
1. Turn off the ignition and all electrical consumers, remove the key from the ignition switch.
Attention.
- The engine power system is divided into a high pressure part (with a maximum pressure of 12 MPa = 120 bar) and low pressure part (with a pressure of approx. 0.6 MPa = 6 bar).
- Before opening the high pressure part, e.g. When removing the high pressure pump, fuel rail, fuel injectors, fuel line or fuel supply pressure sender -G247-, reduce the fuel supply pressure in the high pressure section to approx. 0.6 MPa (6 bar).
2. Unscrew the fastening screws (2), then remove the clamp (1), shown in the figure below.
3. Disconnect the wiring harness connector (3) from charge pressure sender -G31- with intake air temperature sender 2 -G299- as shown in the figure below.
4. Hang the hoses on the pressure pipe and open the cable guide.
5. Press the clips outward (arrows) and remove the pressure pipe upwards as shown in the figure below.
6. Then remove the pressure pipe from the turbocharger.
Note. When loosening the union nut, hold the threads on the high pressure pump and on the lower part of the fuel rail (fuel rail) key.
7. Loosen the union nuts shown in the figure below (arrows) and screw (1), remove the high pressure pipe.
Note.
- Under no circumstances should the fuel line clamp be bent.
- If the fastening clamp is bent or the fuel line is replaced, the fastening clamp must also be replaced.
8. Disconnect the wiring harness connector (1) from fuel pressure regulating valve -N276- and fuel feed line (2) from the high pressure pump, as shown in the figure below.
Note. The resulting fuel should be drained into a rag.
9. Loosen the fastening screws evenly (1), shown in the figure below.
10. Remove the high pressure pump shown in the figure below (3) and a pusher with a striker (1) from the camshaft housing.
Installation
Note.
- The high pressure fuel pump tappet should be lubricated with clean engine oil.
- The high pressure fuel pump O-ring must always be replaced.
1. Install a pusher with a striker (1) into the camshaft housing as shown in the figure below.
2. Insert a new, pre-lubricated O-ring (2) into the groove of the high pressure pump (3), as shown in the figure below.
3. Turn the crankshaft so that the pusher with the striker is in the lowest position.
4. Insert high pressure pump (3) into the camshaft housing as shown in the figure below.
5. Screw in the fastening screws (1) so that the screw heads rest against the flange.
6. Then tighten evenly, shown in the figure below, the fixing screws (1), with a tightening torque of 20 Nm.
7. Screw on the union nuts of the high pressure pipe by hand (arrows), shown in the figure below.
8. After installing the fuel line holder, tighten the fixing screw (1) with a tightening torque of 8 Nm.
Note. When tightening the union nut, hold the threads on the high pressure pump and on the bottom of the intake manifold with a wrench.
9. High pressure pipe union nuts (arrows) must be tightened with a tightening torque of 18 Nm.
10. Further installation is carried out in the reverse order of removal.