Catalytic Converter Removal, Installation, and Inspection

NOTE:
enu_12713377_2.0 Where icon is shown, click for further information.
Although a numbered sequence is shown, these "*1" indicated parts are separate components. If removal or replacement of one of the components is needed, it is not necessary to remove the other.
Due to the high temperatures of the exhaust system, the exhaust nut, studs and bolts may seize preventing easy removal. If you encounter a seized condition, do the following.
Apply rust penetrant to the nut/stud or bolt.
Allow the penetrant to sit. The amount of time may vary.
Lightly tap the nut/stud or bolt with a hammer.
Slowly loosen the nut or bolt.
If the nut or bolt still will not loosen, repeat steps to .


1
WU-TWC*1


1629_3.0_enu_14724535_5.0

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Detailed information, notes and precautions
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Torque: N·m (kgf·m, lbf·ft)
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Replace


2
Under-Floor TWC*1


1629_3.0_enu_14724536_5.0

enu_12713377_2.0
Detailed information, notes and precautions
enu_12714505_1.0
Torque: N·m (kgf·m, lbf·ft)
enu_12714524_1.0
Replace

WU-TWC

3. Exhaust Chamber Cover - Remove


4. TWC Bracket - Remove
Note for installation
Before installing the TWC brackets (A), confirm the bolts and nuts fixing the TWC to the cylinder head are tightened to the specified torque.
Tighten the TWC bracket mounting bolts in the numbered sequence shown.

5. TWC Assembly - Remove


6. Under-Floor TWC - Move (Only for installation)
1.
Move the under-floor TWC leftward and tie it up with string so as not to allow it to touch the WU-TWC (A).
NOTE:
When the under-floor TWC is high temperature, be careful for thermal effect on the material and work.
If there is not enough clearance between the WU-TWC and the under-floor TWC, remove rubbers mounts as necessary.

7. TWC Cover - Remove (if necessary)


8. All Removed Parts - Install
1.
Install the parts in the reverse order of removal with new gaskets and new self-locking nuts.

Under-Floor TWC

3. Under-Floor TWC - Remove


4. All Removed Parts - Install
1.
Install the parts in the reverse order of removal with new gaskets and new self-locking nuts.

1. TWC - Remove


2. TWC - Inspect
1.
Plug up the hole(s) other than main exhaust gas route.
2.
Using a flashlight visually check for plugging, melting, or cracking of the catalyst. Replace the TWC if any of the visible area is damaged or plugged.