Check air intake system for tightness
Preliminary work
- Refer to REMOVING THE ACOUSTIC COVER .
- Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
- Refer to REMOVING THE CENTER UNDERBODY PROTECTION .
- Refer to REMOVING REAR UNDERBODY PROTECTION .
- Refer to PREPARING THE DIAGNOSTIC SYSTEM USING AN APPROPRIATE SCAN TOOL .
Prerequisite
The intake filter housing or upper section of intake filter housing is removed.
NOTE:
TECHNICAL INFORMATION
Excess pressure and vacuum lines can be recognized by the size of their fasteners and are color-coded blue and red respectively.
The overpressure line is marked blue.
The vacuum line is marked red.
Excess pressure and vacuum lines must not be mixed up. Mixing up the lines will result in engine damage.
Excess pressure and vacuum lines can be recognized by the size of their fasteners and are color-coded blue and red respectively.
The overpressure line is marked blue.
The vacuum line is marked red.
Excess pressure and vacuum lines must not be mixed up. Mixing up the lines will result in engine damage.
NOTE:
Schematic diagram is for example purposes. Some parts may differ in certain details.
- Insert the special tool 2 409 665 into the clean air pipe and inflate.
- Seal the clean air pipe airtight using special tool 2 409 665.
- Insert the blue overpressure line (2) of the special tool 0426 464
into the quick-release coupling (1) of the special tool 2 409 665
up to the stop.
- Connect the blue overpressure line to the connector (1) with the special tool 0 426 464.
- Connect the Integrated Measurement Interface Box (1) with the help of a hose (e.g. hose with order number 81 31 2 357 800) with the special tool 0 426 464.
The hose is fastened to the connector of the special tool 0 426 464.
- Follow diagnosis instruction.
- Disconnect the blue overpressure line (2) from the special tool 0 426 464.
The quick-release coupling stays attached.
- Connect the pressure line (1) of the special tool 2 353 954
with the blue overpressure line (2).
- Put the special tool 2 353 954
into operation according to the operating instructions.
- Follow the instructions of the diagnostic system using an appropriate scan tool.
- Search for leakage smoke.
Leaks in the air intake system are detected through emerging smoke.
Follow-up work
- Refer to INSTALLING UNDERBODY PROTECTION AT REAR .
- Refer to INSTALLING THE CENTER UNDERBODY PROTECTION .
- Refer to INSTALLING THE FRONT UNDERBODY PROTECTION .
- Refer to INSTALLING ACOUSTIC COVER .