13 53 180 Replacing the pressure line between the high pressure pump and pressure accumulator (N47 D16/20 K/U/O/T 1)

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Special tools required:

37 1 152

Necessary preliminary tasks:

Read out the fault memory of the DDE control unit.
Switch off ignition.
Disconnect and connect INTAKE AIR MANIFOLD .

IMPORTANT: 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.

IMPORTANT: After the engine has stopped, wait at least 1 minute before releasing the high pressure lines.
After disconnecting the pressure line, it is absolutely essential to seal the openings in the high-pressure pump and the high-pressure accumulator with protective caps.

Recycling:

Catch and dispose of escaping fuel.

Observe country-specific waste disposal regulations.

Release union nuts (1) and (2) on pressure line with special tool 37 1 152

Reset special tool in good time in order to avoid bending high pressure line.

Feed out pressure lines and remove.

Installation note:

Pay attention to installation position of rubber mounts (3) and rubber grommets (4).

Observe tightening sequence.

Fig 1: Identifying Rubber Mounts Union Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Install pressure lines and tighten hand-tight on both sides.
First tighten pressure line at rail (1).
Tightening torque 13 53 2AZ .
Then apply pressure line to high pressure pump (2).
Tightening torque 13 53 2AZ .

Fig 2: Identifying Pressure Line Rail And High Pressure Pump
Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Pay attention to installation position of rubber mount (4) and abrasion protection (3) on pressure line.

Assemble engine.

Check fuel system for tightness.