13 51 017 Removing and installing or replacing high-pressure pump (N14)

WARNING: This page is about a different variant/trim than selected.

WARNING: Disconnect BATTERY NEGATIVE TERMINAL (risk of fire due to short-circuiting on removal).
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.

Necessary preliminary tasks:

Remove FUEL DELIVERY LINE
Replace PRESSURE LINE

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Removal:

Disconnect plug connection (1).

Remove screws and dispose of.

Detach high-pressure pump (2) and remove.

NOTE: Engine oil can escape when pump is detached; have a cleaning cloth ready.

Fig 1: Identifying Plug Connection And High-Pressure Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Installation of high-pressure pump is described separately from removal.

Installation:

Clean contact surface
Replace seal (1).
Drive unit (2) of high-pressure pump must be turned into correct position prior to installation.

Fig 2: Identifying Seal And Drive Unit Of High-Pressure Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Align drive unit of high-pressure pump with respect to groove (1) on intake camshaft.

Fig 3: Identifying High-Pressure Pump Groove

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace screws (1).

Observe following installation sequence:

Hand-tighten bolts (1) of high-pressure pump (2) (high-pressure pump must still move)
Hand-tighten new delivery line (3). First tighten nut (4) on high-pressure rail then tighten nut (5) on high-pressure pump
Tighten high-pressure pump
Tightening torque: 11 ± 1 Nm
Tighten delivery line (3).
Tightening torque 13 53 1AZ

Fig 4: Identifying High-Pressure Pump, Bolts, Delivery Line And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine

Reconnect plug connection on high pressure pump.

Check fuel system for LEAKS .

Check function of DME.