Warm Up TWC
Warm Up TWC Removal/InstallationFRONT
1. Remove the engine cover.
2. Remove the front A/F sensor (sensor 1) and the front secondary HO2S (sensor 2).
3. Remove the exhaust pipe A mounting nuts (front WU-TWC side).
4. J35A7 engine ('08 model): Remove the EGR pipe.
5. Remove the A/C condenser fan assemblies.
6. Carefully remove the front WU-TWC.
7. Carefully 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.
8. Install the parts in the reverse order of removal.
REAR
1. Remove exhaust pipe A.
2. Remove the power steering heat shield.
3. Remove the upper cowl cover.
4. Remove the intermediate shaft shield.
5. Remove the rear A/F sensor (sensor 1) and rear secondary HO2S (sensor 2).
6. Remove the rear WU-TWC bracket.
7. Carefully remove the rear WU-TWC.
8. Carefully install the rear WU-TWC with a new gasket and new self-locking nuts. Tighten the nuts in a crisscross pattern in two or three steps.
9. Install the parts in the reverse order of removal.