13 53 540 Replacing, sealing fuel hoses

WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 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: Releasing Hose Clamps & 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: Locating Compressed Air Blowing Point

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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: Releasing Fuel Hoses

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Version, fuel hoses with integrated unlocking facility:

Press fuel hose (1) downwards and keep pressed.

Fig 4: Pressing Fuel Hose Downwards (Version, Fuel Hoses With Integrated Unlocking Facility)

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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 Upwards & Detaching Fuel Hose

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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: Locating Screw-Mounted Fuel Feed Line (M43, 44)

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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 FUEL SUPPLY SYSTEM - TIGHTENING TORQUES .

Fig 7: Locating O-Ring (M43, 44)

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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 Hoses & Fuel Lines With Special Tool

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