Installing pressure line

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Installation of pressure rail is described separately from removal.

Copper seals that may be fitted (1) are no longer needed and must be removed.

If reusing the pressure line, apply a light coating of gear oil to threads of pressure connections. New pressure lines are already coated.

Fig 1: Identifying Copper Seals

Courtesy of BMW OF NORTH AMERICA, INC.

Install delivery line (4).

In so doing, tighten screw connections (1 to 3) hand-tight only.

IMPORTANT: Connect pressure line (4) without tension only.
To ensure distortion-free installation of the pressure line and to avoid damaging the thread, it must be possible for both nuts (1 and 2) to be screwed on easily by hand!
If the nuts cannot be screwed on easily by hand, the high-pressure pump must be slackened.
This operation is described in the following section.

Fig 2: Identifying High-Pressure Line With Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Only if high-pressure pump has to be slackened:

Slacken screws with special tool 11 8 610.

Turn high-pressure pump (1) on flange so that nuts of high pressure line can be easily screwed on by hand.

Tighten down screws. Tightening torque 13 51 1AZ .

Fig 3: Detaching High-Pressure Pump

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Follow sequence of screw connections:

Tighten down nut (1) with special tool 13 5 020. Tightening torque 13 53 7AZ .
Tighten nut (2). Tightening torque 13 53 7AZ .
Tighten down screw (3) for holder. Tightening torque 13 53 2AZ .

Fig 4: Identifying High-Pressure Line With Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check fuel system for leaks.

Check function of DME.