Removing high-pressure fuel line from injector to rail

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NOTE: The following description applies to all pressure lines.

First release pressure line on rail to reduce existing fuel pressure if necessary. Fuel must not get into the spark plug slot. Then release pressure line on injector.

Fig 1: Identifying Pressure Line And Union Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Release union nuts (1).

Disconnect pressure line (2).

Set down pressure lines in order.

Secure injector against twisting with wrench (2).

Release union nut (1).

IMPORTANT: If several pressure lines are removed, ensure that each pressure line is reinstalled in its original location (cylinder).

Fig 2: Securing Injector Against Twisting Using Wrench

Courtesy of BMW OF NORTH AMERICA, INC.

Mark pressure lines.

Installation: