Check injector valves for leaks

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 BMW 325i, 2005 BMW 325Ci, 2004 BMW 325i, 2004 BMW 325Ci, and 2003 BMW 325i. However, it is still accessible from the selected car via links, so may be relevant.

Clip fuel injectors into special tool 13 6 205.

Fig 1: Clipping Fuel Injectors Into Special Tool 13 6 205

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Connect special tool 13 6 206 to the injector valves.

Fig 2: Connecting Special Tool 13 6 206 To Injector Valves

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To catch remaining fuel, wrap fuel injectors in clean cleaning cloth.

Connect special tool 13 6 206 to a 12 V car battery.

This removes the remaining fuel from the injector valves.

Connect special tool 13 6 205 to compressed air connection of max. 5 bar.

Residual fuel is now blown out of the injector valves.

Fig 3: Connecting Special Tool 13 6 206 To 12 V Car Battery

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Carry out leak test only after remaining fuel has been blown out of injector valves.

Separate special tool 13 6 206 from the injector valves.

Install injector valves with special tool 13 6 205 in a container with hot water (60... 80°C).

Adjust air pressure at connection (1) on special tool 13 6 205 to max. 3 bar (motorsport models max. 5 bar).

Note volume of air emerging. Permitted volume of air emerging: 2 air bubbles per injector valve within a 15 second period.

Fig 4: Adjusting Air Pressure At Connection On Special Tool 13 6 205 To Max. 3 Bar (Motorsport Models Max. 5 Bar)

Courtesy of BMW OF NORTH AMERICA, INC.

Note injector valves with larger volumes of air emerging.

Injector valves with larger amounts of air emerging must be cleaned.

Remove fuel injectors from water and dry thoroughly with compressed air.