Checking the internal engine pressure

Preliminary work 

• Refer to CHECKING ENGINE OIL LEVEL .
• Refer to REMOVING THE OIL FILLER CAP .

• Have the special tool 2 471 014 ready.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Insert the special tool 2 471 014 into the opening of the oil filler neck and screw it in hand-tight.
• Connect connection hose (1) to the special tool.
  TESTING EQUIPMENT SPECIFICATION
  
  

  Connecting hose
  dia. = 8 x 13 mm, length = 70 mm

  Courtesy of BMW OF NORTH AMERICA, INC.

• low pressure line

  low pressure line

  IMIB R2 low pressure line 

  81 31 2 357 800 

  300 

  mm 

  Connect with the connection hose (1).

• low pressure line 

  low pressure line 

  IMIB R2 low pressure line 

  81 31 2 357 800 

  300 

  mm 

  (1) Connect with the Integrated Measurement Interface Box (IMIB).

• Start engine and run at idle speed.

  Check 

• Check the internal engine pressure with the Integrated Measurement Interface Box (IMIB).
• Connect the diagnostic system and follow the diagnosis instructions for the pressure test.
  • Troubleshooting
  • Function structure
  • Power train
  • Engine electronics
  • Crankcase ventilation
  TECHNICAL DATA SPECIFICATION
  
  

  Differential pressure between ambient pressure and engine internal pressure
  	Nominal value  0 +30 /-15	mbar

  Result 

  » There is a deviation between the measured value and the ambient pressure.

  Measure

• Determine possible causes by means of the table and eliminate them.

  	Deviation	Possible cause	Measures
  Result 1	Measured value < ambient pressure 0.95 bar	Pressure control valve faulty	Replace the pressure control valve
  Result 2	Measured value > ambient pressure 0.95 bar	Crankcase ventilation system blocked	Clean the crankcase ventilation system

Follow-up work 

• Refer to INSTALLING THE OIL FILLER CAP .