Warm Up TWC Removal/Installation

Warm Up TWC Removal/Installation

FRONT WU-TWC (Bank 2)

1. Remove the engine cover.

2. Remove the front A/F sensor (Sensor 1) and front secondary HO2S (Sensor 2); 5-speed A/T model, 6-speed A/T model.

3. Remove exhaust pipe A Service and Repair.

4. Remove the EGR pipe Service and Repair.

5. Remove the front bumper Service and Repair.

6. Remove the mounting bolt (A) for the P/S cooler line.





7. Remove the A/C condenser fan shroud assembly.

8. Loosen the radiator drain plug, and drain about 1 liter (1.05 quarts) of coolant from the radiator.

9. Pinch the top radiator hose (A) with hose pinching Pliers. Release the top clamp (B) and remove the top hose from the radiator.

NOTE: Careful not damage the hose.





10. Place an appropriate sized piece of cardboard over the A/C condenser fan area of the radiator to protect the radiator.

11. Remove the front WU-TWC bracket (A), the front WU-TWC mounting bolts and self-locking nuts (B), then remove the covers (C).






12. Gently pull the radiator away from the front bulkhead and carefully remove the front WU-TWC.





13. Install the front WU-TWC with a new gasket and new self-locking nuts. Tighten the nuts in a crisscross pattern in two or three steps.

14. Install the parts in the reverse order of removal, and note these items:

- Reconnect the top radiator hose and clean up any spilled engine coolant.
- Install the EGR pipe with new gaskets.
- Install exhaust pipe A with new gaskets and self-locking nuts. Tighten the nuts in the proper sequence.
- Refill the radiator with engine coolant as needed, and bleed the system.

REAR WU-TWC (Bank 1)

1. Remove the rear A/F sensor (Sensor 1) and rear secondary HO2S (Sensor 2).

2. Remove exhaust pipe A Service and Repair.

3. Remove the driveshaft support base Driveshaft Support Base Replacement.

4. Remove the rear WU-TWC bracket (A), carefully remove the rear WU-TWC (B), then remove the covers (C).





5. Carefully install the rear WU-TWC with a new gasket (D) and new self-locking nuts (E). Tighten the nuts in a crisscross pattern in two or three steps.

6. Install the remaining parts in the reverse order of removal.