Checking For Air Leakage In the Exhaust System

CHECKING FOR AIR LEAKAGE IN THE EXHAUST SYSTEM

Special tools: 999 5544, 999 5546




Engagement

Caution! If the car has been driven recently the exhaust system may be very hot. Allow it to cool down a little. Otherwise the special tool may get burnt.

Install tool 999 5546 and pressure regulator 999 5544 on the exhaust system.
Adjust the pressure to 0.4 bar. Depending on the condition of the exhaust system a lower pressure may be necessary.




Check
Check the exhaust system. Spray a soap solution on all joints and connections between the cylinder head and the rear heated oxygen sensor (H025).
Only very small and slow bubbles are permissible.