13 51 004 Removing and installing/replacing high pressure pump (N47 D20 O1)

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Special tools required:

IMPORTANT: Special tool 11 8 741 must - after it has been installed - without fail remain bolted in the camshaft sprocket until all repair work has been completed.
When working on the fuel circuit, you must protect the alternator against dirt contamination.
Cover alternator with suitable materials. Failure to comply with this procedure may result in an alternator malfunction.

NOTE: After disconnecting the fuel injection line, it is absolutely essential to seal the high pressure pump and the high-pressure accumulator with protective caps 32 1 270 .
The position of the high pressure pump in relation to the valve gear does not affect its function. However, it must be taken into account on removal and installation.
For purposes of clarity, all pictures have been created to show the engine removed.

Recycling:

Catch and dispose of escaping fuel.

Observe country-specific waste disposal regulations.

Necessary preliminary tasks:

Switch off ignition.
Remove INTAKE PLENUM .
Remove PRESSURE LINE between high pressure pump and pressure accumulator.
Secure crankshaft position at firing TDC; for more information, refer to CHECKING TIMING .

Unlock connector (1) on metering unit and detach.

Detach fuel feed and return lines (2) of high pressure pump.

Installation note:

Replace clamps. Tightening torque: 13 51 3AZ .

Fig 1: Identifying Connector On Metering Unit And Return Lines

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Release sealing cap in the timing case housing. Picture shows the sealing cap on the removed engine. Replace sealing cap with O-ring.

Installation note:

Tightening torque: 11 14 1AZ .

Fig 2: Identifying O-Ring Of Sealing Cap

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Screw in special tool 11 8 741 for positioning the camshaft sprocket of the high pressure pump. The remove special tool 11 8 742 . Special tool 11 8 741 remains in the timing case housing until the end of the repair work.

Fig 3: Positioning Camshaft Sprocket Of High Pressure Pump

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Release screws (1), (2), (3) and (4).

Remove high pressure pump support.

Fig 4: High Pressure Pump Support Bolts Tightening/Loosening Sequence

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Release screws (1).

Tightening torque: 13 51 4AZ .

Fig 5: Identifying Screws

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IMPORTANT: Special tool 11 8 741 remains in timing case housing.
Central bolt remains in camshaft sprocket.

Release screw connection between high pressure pump and camshaft sprocket.

NOTE: Central bolt is supported on special tool 11 8 740 until high pressure pump is pressed out.

Fig 6: Identifying Special Tool (11 8 741)

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Remove high pressure pump.

Installation note:

Tightening torque: 13 52 2AZ .

To insert the high pressure pump shaft in the sprocket wheel (1), it may be necessary to swing the high pressure pump through several degrees (spline groove-lug fit, see arrow). Then rotate high pressure pump back into screwing position.

Fig 7: Inserting High Pressure Pump Shaft In Sprocket Wheel

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Replacing high pressure pump:

When installing a new high pressure pump, adapt the high pressure pump camshaft sprocket assignment. To do so, turn back high pressure pump at set-back part of shaft 45° clockwise (top view). Do not damage the shaft, especially the taper.

Fig 8: Identifying High Pressure Pump

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When installing the high pressure pump support, adhere to the screwing sequence.

Installation note:

Tighten down to head (gap-free) hand-tight, sequence 1-2-3-4
Tighten to final torque

Tightening sequence 2-3-4-1

Tightening torque: 13 51 2AZ .

Fig 9: High Pressure Pump Support Bolts Tightening/Loosening Sequence

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Installation note:

Assemble engine.

Bleed fuel system using BMW diagnosis system.

Check fuel system for tightness.

Reset adaptation of electric fuel pump with BMW diagnosis system.