Catalytic Converter Removal and Installation

Three Way Catalyst: Removal and Installation [VQ40DE]

WARNING:

Perform the work when the exhaust and cooling system have cooled sufficiently.

Removal

1) Remove the front wheel and tire. Refer to [Wheel and Tire Assembly: Adjustment] Service and Repair.
2) Remove the mudguard and front fender protector. Refer to [Front Fender Protector: Removal and Installation] Front Fender Protector Removal and Installation.
3) Remove the exhaust manifold cover bolts.
4) Remove the center exhaust tube, main muffler and front exhaust tube. Refer to [Exhaust System: Exploded View] Exploded View.
5) Disconnect the air fuel ratio sensor 1 harness connector.
6) Remove the three way catalyst nuts and remove the three way catalyst.
7) Remove the air fuel ratio sensor 1 using Tool, if necessary.






CAUTION:
- Be careful not to damage air fuel ratio sensor 1.
- Discard any air fuel ratio sensor 1 which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; replace with a new sensor.

Installation

Installation is in the reverse order of removal.

- Tighten air fuel ratio sensor 1 to specification, if removed.






CAUTION:
- Do not over tighten air fuel ratio sensor 1. Doing so may cause damage to air fuel ratio sensor 1, resulting in the "MIL" coming on.
- Before installing a new air fuel ratio sensor 1, clean exhaust system threads using oxygen sensor thread cleaner and apply anti-seize lubricant.