Exhaust System Components, Removing and Installing (Overview Notes)
Exhaust System Components, Removing And Installing
CAUTION:
When doing any repair work, especially in the engine compartment, due to clearance issues, pay attention to the following:
- Route all the various lines (e.g. for fuel, hydraulics, EVAP system, coolant, refrigerant, brake fluid and vacuum lines and hoses) and electrical wiring so that the original positions are restored.
- Make sure there is sufficient clearance to all moving or hot components.
- Check the heat shield in the area of the catalytic converter before and after replacing. The catalytic converter has to be removed carefully, because there is a limited amount of clearance.
- There has to be a clearance of 25 mm between the heat shield and the catalytic converter to allow for convection.
- Do not use sealants containing silicone. Particles of silicone drawn into the engine, will not be burned in the engine and will damage the oxygen sensors.
- After working on the exhaust system make sure that the system is not under stress, and that it has sufficient clearance from the body. If necessary, loosen double clamps and align muffler and exhaust pipe so that sufficient clearance is maintained to the body and the mounts carry uniform loads.
Special tools, testers and auxiliary items required
- Ring wrench for oxygen sensor 3337
- Torque wrench V.A.G 1331
- Body repair saw V.A.G 1523
- Hot bolt paste G 052 112 A3
Exhaust System Components, Removing And Installing
NOTE:
- After exhaust system repairs, make sure exhaust system is not under stress and that it has sufficient clearance from the bodywork. If necessary, loosen double clamps and align exhaust pipe so that sufficient clearance is maintained to the bodywork and support rings carry uniform loads.
- Do not use any silicone sealant. Traces of silicone components which are sucked into the engine are not burned there, and they damage the oxygen sensor.
- Always replace self-locking nuts.
- Components marked with * are tested via On Board Diagnostic (OBD). Diagnostic mode 3: Check DTC memory.
- Check catalytic converter