High Pressure Pump
High Pressure Pump
Removing
• The high pressure pump can only be removed when the engine is cold.
• When installing, make sure that no dirt enters the fuel system.
• Catch escaping fuel with a rag.
• The O-ring must always be replaced.
• Always install the fuel high pressure lines so that they are free of tension.
Fuel system is under high pressure! Before opening the system, perform the procedure for releasing the fuel pressure. Refer to => [ Releasing Pressure in High Pressure Area ] Releasing Pressure In High Pressure Area.
- Remove engine cover.
- Disconnect the connector - 2 - from the fuel pressure regulator valve (N276).
- Open both fuel lines - arrows -.
- Remove the 2 bolts - arrows -.
- Carefully pull out the high-pressure fuel pump. The roller tappet may remain in the vacuum pump.
Installing
- Replace the O-ring for the high-pressure pump.
- Insert the roller tappet in the vacuum pump after checking the tappet for damage.
• To insert the high pressure pump, the roller tappet must be at its lowest point.
• If the same or a used high pressure pump is installed, replace the fuel supply line connections (high pressure side). Refer to => [ High Pressure Pump Overview ] High Pressure Pump Overview, see Item 11.
- Rotate the crankshaft in direction of engine rotation until the roller tappet is at the lowest point.
- Insert the high pressure pump in the vacuum pump.
- Tighten the bolts by hand.
- Replace the connections on the high pressure pump.
• Tightening specifications, refer to => [ High Pressure Pump Overview ] High Pressure Pump Overview
- Tighten the bolts crosswise with the required torque.
- Tighten the fuel supply line union nut by hand. Align so it is free of stress.
• Fuel supply line union nut tightening specification, refer to => [ Intake Manifold Overview ] Intake Manifold Overview.
- Connect the electrical connector - 2 - from the fuel pressure regulator valve.
- If the fuse was pulled, insert it again.
• Check fuel system for leaks.