13 51 070 Removing and Installing/Replacing Right High-Pressure Fuel Pump

13 51 070 Removing And Installing/Replacing Right High-Pressure Fuel Pump (N63)







WARNING:
Observe warning on cylinder head cover.
Disconnect battery negative terminal (risk of fire due to short-circuiting on removal).
Electric fuel pump starts up automatically when door is opened.
Carry out installation work on fuel system only with coolant temperature below 40 °C.







IMPORTANT:
Wear full face guard and protective gloves.
Fuel can emerge spontaneously at high velocity when the high-pressure line is released.







IMPORTANT:
Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.
Introduced contaminants can cause malfunctions in the system.
- Do not allow any dirt particles or foreign bodies to get into the system.
- Remove all traces of dirt before removing pipes or individual components.
- Use only fluff-free cloths.
- Seal all fuel system openings with protective caps or plugs.







IMPORTANT:
Ignition coils must not be fouled by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail.
Cover ignition coil with suitable means.







Necessary preliminary tasks:
- Remove fuel feed line
- Remove high-pressure line from right high-pressure pump to rail.







Recycling:
Fuel escapes when fuel lines are detached.
Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.







IMPORTANT: High-pressure pump can be pretensioned by camshaft cams.

Gently release screws (1) of high-pressure pump (2). If the high-pressure pump is pressed out, the engine must be rotated.
Otherwise it will not be possible to install the high-pressure pump.







Rotate engine at central bolt through 90° in direction of engine rotation.







Release screws (1).
Replace screws (1). Screws (1) are coated with sealant.

IMPORTANT: Pump plunger can fall out when high-pressure pump (2) is pulled out.

Detach high-pressure pump (2) and remove.
Engine oil can escape when pump is detached; have a cleaning cloth ready.

Installation:
Provisionally fasten screws (1) and tighten uniformly in 180° increments until final tightening.

Tightening torque 13 51 1AZ.







Installation:
Replace sealing ring (1).
Clean contact faces.







Assemble engine.
Check fuel system for leaks.
Check function of DME.