Three-Way Catalytic Converter (TWC), Replacing
Three-way Catalytic Converter (TWC), Replacing
Special Tools: 999 2901
Exhaust pipe front from three-way catalytic converter (TWC), removing
Exhaust pipe front, removing
- Raise the car.
- Apply rust solvent to all components.
Remove:
- the rear engine cover
- the nuts and the front exhaust pipe
- gasket
- the lower (rear) heated oxygen sensor (HO2S).
Lower the car.
Three-way Catalytic converter (TWC), removing
Remove:
- the heat shield from the car body
- the upper (front) heated oxygen sensor (HO2S)
- the nuts. Lift out the three-way catalytic converter (TWC)
- the gasket.
Three-way catalytic converter (TWC), installing
NOTE: Ensure that there is no exhaust leakage.
Clean the mating surfaces.
Install:
- the gasket on the turbocharger (TC)
- the three-way catalytic converter (TWC). The nuts. Tighten to 30 Nm.
Heated oxygen sensor (HO2S) front (upper), installing
- Install a new sealing ring
- Apply copper paste (P/N 1161035-9) to the entire length of the screw thread
- To avoid damage from twisting to the cable harness for the heated oxygen sensor (HO2S), turn the probe approximately 4 turns counter-clockwise before inserting it
- Install the heated oxygen sensor (HO2S). Tighten to 55 Nm
- Install the heat shield on the body.
Raise the car.
Rear (lower) heated oxygen sensor (HO2S), Installing
- Install a new sealing ring
- Apply copper paste (P/N 1161035-9) to the entire length of the screw thread
- To avoid damage from twisting to the cable harness for the heated oxygen sensor (HO2S), turn the probe approximately 4 turns counter-clockwise before inserting it
- Install the heated oxygen sensor (HO2S). Tighten to 55 Nm.
Exhaust pipe front on three way catalytic converter (TWC), Installing
- Clean the mating surfaces.
- Install a new gasket
- Secure the front exhaust pipe to the manifold. Tighten the nuts. Tighten to 25 Nm
- Reinstall the splash guard.
Check the function
Start the engine. Check that there is no leakage.