Measuring the internal engine pressure (B38 engine) (Cooper Clubman base)

Special tools required:

NOTE:

NOTE: Create hose piece (1), Ø = 8 x 13 mm, length = 70 mm.

Create hose piece of low pressure line (2), length = 300 mm.

Connect hose piece (1) with low pressure line (2).

Connect low pressure line (2) with the diagnosis connection of the Integrated Measurement Interface Loudspeaker (IMIB).

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Connect tube (1) to special tool 11 9 880.

Open oil filler cap.

Insert special tool 11 9 880 hand-tight into oil filler neck opening.

Start engine and run at idle speed.

NOTE: Order number of the vacuum hose (IMIB accessory) 81 31 2 468 782 (previously: 81 31 2 357 800 or 81 38 2 201 924)

NOTE: Illustration B47.

Different fault patterns as example:

0.97 bar Ambient pressure.

0.95 bar Engine internal pressure normal.

If the deviation is significantly greater than -0.04 bar, the crankcase ventilation system is faulty .

0.80 bar Pressure control valve faulty.

If the deviation is significantly greater than +0.04 bar, the crankcase ventilation system is clogged .

1.07 bar Clogged ventilation system, e.g. iced up, contaminated or kinked vent line.