Catalytic Converter: Service and Repair

Catalytic Converter, Removing And Installing

Removing







- Unscrew bolts -arrows- and take off engine cover panels -A ... C-.







- Remove air distributor component -arrows-.

Right-hand catalytic converter:







- Unplug connector -1- for oxygen sensor at bulkhead.

Left-hand catalytic converter:







- Unplug connector -2- for oxygen sensor at bulkhead.







- Unbolt heat shield -2- on turbocharger.
- Remove upper bolt -3- securing front exhaust pipe to turbocharger.







- Unbolt guard plate -arrows- above drive shaft from gearbox.
- Unbolt drive shaft -1- at gearbox and tie up.







- Remove cross strut -arrows-.







- Remove retainers -arrows-.







- Remove gearbox support -arrows-.
- Loosen exhaust system clamp and push clamp towards muffler.







- Loosen hose clamp -1- on turbocharger heat shield.
- Unbolt exhaust pipe -2- from turbocharger.


NOTE: Avoid excessive bending of the flexible pipe connection (de-coupling element) on the front exhaust pipe. The angle between the catalytic converter and the front exhaust pipe must not exceed 10°, otherwise the flexible connection will be damaged.


Installing
- Install in reverse order.


NOTE: The double clamp must be replaced after unscrewing the bolted connection.


- Adjust exhaust system.