Exhaust System: Testing and Inspection

Checking for air leakage in the exhaust system

Special tools:
999 5544 REGULATOR 999 5544 Regulator
999 5546 ADAPTOR 999 5546 Adapter

Connecting





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

Remove the exhaust tail pipe.
Install tool 999 5546 ADAPTOR 999 5546 Adapter with pressure regulator 999 5544 REGULATOR 999 5544 Regulator 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 exhaust system by spraying a soap solution on all joints and connections between cylinder head and rear heated oxygen sensor (HO2S).
Only very small and slow bubbles are permissible.
Install tail pipe on exhaust system after check.