13 53 175 Removing And Installing/Replacing All Pressure Lines (N73)

Special Tools Required: 

• 13 0 131
• 13 0 132
• 13 0 133

Necessary Preliminary Tasks: 

• Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N73) .

Recycling: 

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Remove pressure sensors (1 to 6 and 7 to 12). Refer to 13 53 567 REPLACING FUEL PRESSURE SENSOR (N73) .

Reinstall pressure sensor after completing work.

Screw in special tool 13 0 132.

Connect special tool 13 0 133 drain tube (1) to special tool 13 0 132.

Fig 1: Pressure Sensors, Special Tools (13 0 132) And (13 0 133)

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect fuel feed line (1).

Connect special tool 13 0 131 to fuel feed line (1).

Drain fuel with compressed air (2) carefully  from fuel feed line, cylinders 1 to 6.

Screw in pressure sensors 1 to 6 again.

Follow the same procedure for cylinders 7 to 12.

NOTE: If necessary, use a pressure reducer for draining.

Fig 2: Fuel Feed Line, Compressed Air And Special Tool (13 0 131)

Courtesy of BMW OF NORTH AMERICA, INC.

Release high pressure lines (1 and 6).

Release return lines (3).

Tightening torque, refer to 13 53 6AZ in FUEL SYSTEM - TIGHTENING TORQUES .

Detach high-pressure line (7).

Tightening torque, refer to 13 53 7AZ in FUEL SYSTEM - TIGHTENING TORQUES .

Release holders (2, 4 and 5).

Fig 3: High-Pressure Lines, Return Lines And Holders

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Tighten high-pressure lines (2) with a ring wrench (1).

Tightening torque, refer to 13 53 1AZ in FUEL SYSTEM - TIGHTENING TORQUES .

Tightening torque, refer to 13 53 2AZ in FUEL SYSTEM - TIGHTENING TORQUES .

Tightening torque, refer to 13 53 3AZ in FUEL SYSTEM - TIGHTENING TORQUES .

Assemble engine.

Check fuel lines for leaks.

Fig 4: High-Pressure Lines And Ring Wrench

Courtesy of BMW OF NORTH AMERICA, INC.