11 15 510 Measuring the internal engine pressure (B48B)

WARNING: This page is about a different car, the 2018 BMW 330i and 2017 BMW 330i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 9 880
81 31 2 357 800

NOTE:

Follow the diagnosis instruction for pressure testing.
Check engine oil level.

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 Speaker (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 for low-pressure hose: 81 31 2 357 800 (previously: 81 38 2 201 924)

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 engine ventilation system is faulty.

0.80 bar Pressure control valve faulty.

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

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