13 53 540 Replacing, sealing fuel hoses

WARNING: This page is about a different car, the 2005 BMW 530i, 2005 BMW 525i, 2004 BMW 530i, and 2004 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: The fuel in the fuel lines is under pressure (approx. 3-5 bar)!

Recycling

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Version with hose clamps:

Release hose clamps.

Remove hoses (1) and (2).

Installation:

Fuel hoses and hose clamps must be replaced each time they are removed!

Fig 1: Removing Hoses

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Version with compressed air connection:

Blow fuel back into tank with a short blast of compressed air (max. 3 bar) at compressed air connection (1).

Fig 2: Identifying Compressed Air Connection

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Version, fuel hoses without integrated unlocking facility:

Unlock fuel hoses with special tool 16 1 050 and detach hoses.

Installation:

Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.

Coat O-ring for assembly with anti-friction agent.

Fig 3: Unlocking Fuel Hoses With Special Tool

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Version, fuel hoses with integrated unlocking facility:

Press fuel hose (1) downwards and keep pressed.

Fig 4: Pressing Fuel Hose Downward

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Press unlocking ring (2) upwards, keep pressed and detach fuel hose (1).

Installation:

Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.

Coat O-ring for assembly with anti-friction agent.

Fig 5: Pressing Unlocking Ring

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M43, M44:

Cars with screw-mounted fuel feed line (2):

Follow installation instructions (1) and (2).

Installation instruction 1:

Always replace fuel hose (1) and hose clamps once they have been removed.

Fig 6: Replacing Fuel Hose And Hose Clamps

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M43, M44:

Installation instruction 2:

Always replace O-ring. Coat O-ring with anti-friction agent.

Clean sealing faces of fuel feed line.

If necessary, replace fuel feed line.

Tightening torque, refer to 13 53 4AZ in FUEL SYSTEM - TIGHTENING TORQUES - 525i & 530i .

Fig 7: Replacing O-Ring

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Seal off fuel hoses:

Fuel hoses with hose clamps:

Seal hoses with special tool 13 3 010.

Installation:

Fuel hoses and hose clamps must be replaced each time they are removed!

Fig 8: Sealing Hoses With Special Tool

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Fuel hoses with quick-release couplings:

Seal fuel hoses (1) with special tool 13 5 281.

Seal fuel lines (2) with special tool 13 5 282.

Installation:

Check O-ring in fuel hose and sealing surfaces on fuel

lines for damage; replace components if necessary.

Coat O-ring for assembly with anti-friction agent.

Fig 9: Sealing Fuel Hoses With Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.