Related Tests, Information and Procedures

Air leaks in the intake system, checking

Special tools:
999 5545 ADAPTOR 999 5545 Adaptor
999 5544 REGULATOR 999 5544 Regulator

Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Removal

Preparations
Check that all hoses are undamaged. Check that all hoses are in place with their hose clips tightened.

Connect the test pressurization equipment





Remove:
- the hose clamp (2) between the mass air flow (MAF) sensor and the intake manifold for the turbocharger (TC)
- the screws for the intake manifold. Fold the pipe up. Connect tool 999 5545 ADAPTOR 999 5545 Adaptor and pressure regulator 999 5544 REGULATOR 999 5544 Regulator to the intake manifold. Tighten the hose clamp.

Check




Remove the oil filler cap. Connect the compressed air hose. Adjust the regulator to obtain a maximum pressure of 0.3 bar.
There may be a gentle hissing sound from the oil filler opening. This is due to the opening of an intake valve and the leakage of cylinder pressure past the piston rings. If a leak is suspected, spray a soap solution onto the area. Remedy any leakage.

Installation

Installing components





Install:
- the intake manifold between the mass air flow (MAF) sensor and the turbocharger (TC)
- the screws for the intake manifold. Tighten
- the hose clamp (2) at the mass air flow (MAF) sensor.