Air Leakage Exhaust System, Check

Air leakage exhaust system, check

Special tools:
999 7085 Adapter 999 7085 Adapter
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.

Removing / installing

Removing components





Note! Use rust solvent or similar on the nuts.

Remove:
- the nuts at the junction between the three-way catalytic converter (TWC) and the exhaust system
- the gasket. Separate the exhaust system from the three-way catalytic converter (TWC).
Install the tool (1). Use: 999 7085 Adapter 999 7085 Adapter together with a new gasket.




Install pressure regulator 999 5544 REGULATOR 999 5544 Regulator on tool 999 7085 Adapter 999 7085 Adapter. Adjust the pressure to0.4 bar.

Check
Check the exhaust system. Spray a soap solution on all joints and connections between the cylinder head and the rear heated oxygen sensor (HO2S).
Only very small and slow bubbles are permissible.

Installing components

Remove:
- pressure regulator 999 5544 REGULATOR 999 5544 Regulator
- tool 999 7085 Adapter 999 7085 Adapter.

Install:
- a new gasket at the junction on the exhaust system and at the three-way catalytic converter (TWC)
- new nuts for the exhaust system. Tighten.
Start the engine. Check for leaks where the three-way catalytic converter (TWC) and the exhaust system divide.