Generic Scan Tool

High Pressure Pump

Fuel system is under high pressure! Before opening the system, perform the procedure for releasing fuel pressure. Refer to => [ Releasing Pressure in High Pressure Area ] Description and Operation.

• Remove the high pressure pump only when the engine is cold.

• When installing, make sure that no dirt enters the fuel system.

• Catch escaping fuel with a cloth.

• Always replace the O-ring.

• Install the fuel high-pressure lines free of tension.

Removing

- Remove the engine cover.

- Disconnect the connector - 1 - 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). See the high pressure pump assembly overview, item 11, refer to => [ High Pressure Pump Overview ] High Pressure Pump Overview.

- Rotate the crankshaft until the roller tappet is at the lowest point.

- Install the high pressure pump into the vacuum pump and tighten it.

- Tighten the bolts by hand.

- Replace the connections on the high pressure pump.

• Tightening specifications: High pressure pump assembly overview, refer to => [ High Pressure Pump Overview ] High Pressure Pump Overview

- Tighten the bolts in a diagonal sequence to the specification. See the high pressure pump, assembly overview, refer to => [ High Pressure Pump Overview ] High Pressure Pump Overview.

- Tighten the fuel supply line union nut by hand. Align so it is free of stress.

• Fuel supply line union nut tightening specification: Intake manifold assembly overview, refer to => [ Intake Manifold Overview ] Intake Manifold Overview.

- Connect the electrical connector - 1 - from the fuel pressure regulator valve (N276).






- If the fuse was pulled, insert it again.

• Check fuel system for leaks.