11 61 730 BMW leakage test for intake system (N63O1)

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Special tools required:

IMPORTANT: Excess pressure and vacuum lines can be recognised by the size of their fasteners and are color-coded blue and red respectively.
Identification:

Pressure line blue
Vacuum line red

Excess pressure and vacuum lines must not be mixed up.
Mixing up the lines will result in engine damage.

Necessary preliminary work:

Remove INTAKE SILENCER HOUSING
Prepare BMW diagnosis system
Start diagnosis program
1. Power train
2. Engine electronics
3. Air supply
4. Charging pressure control system or perception of lack of power

Ordering information:

Workshop Equipment - Start BMW
Workshop equipment catalogue
Measuring and test equipment
Service and diagnosis
Order number 81 29 0 426 464
Order number 81 31 2 353 954

Check intake system for leaks:

For a precise leakage test, both clean air pipes must be closed with the special tool 2 358 459 .

Fasten clamp with 4 Nm.

Connect the pressure hose (1) with special tool 2 358 459 .

Fig 1: Checking Intake System For Leaks

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Insert the blue over overpressure lines into the pneumatic coupling (1) up to the limit position.

Fig 2: Identifying Pneumatic Coupling

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Insert the blue overpressure lines on the diagnosis auxiliary device 0 426 464 on the connector (1).

Connect the IMIB (3) with the connector (2) of the diagnosis auxiliary device by means of the hose 2 201 924.

Fig 3: Identifying IMIB, Connectors, And Special Tool (0 426 464)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Follow diagnosis instruction.

Leak detection with BMW smoke tester:

Disconnect the overpressure line (2) on the diagnosis auxiliary device.

Connect pressure line (1) from the BMW smoke tester 2 353 954 with the overpressure line (2).

Fig 4: Connecting Pressure Line From BMW Smoke Tester With Overpressure Line

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Put the BMW smoke tester 2 353 954 into operation according to the operating instructions.

Fig 5: Identifying BMW Smoke Tester (2 353 954)

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Observe BMW diagnosis instructions.

Leaks on the air intake duct are detected by escaping smoke.