11 15 510 Measuring the internal engine pressure (B48A)
WARNING: This page is about a different variant/trim than selected.
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), 0 = 8 x 13 mm, length = 70 mm.
Create hose piece of low pressure line (2), length = 300 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).
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)
NOTE:
Illustration shows 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 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. |