Sienna LE V6-3.0L (1MZ-FE) (1998)
Catalytic Converter: Service and Repair
REPLACEMENT
1. REMOVE CONVERTER
(a) Jack up the vehicle.
(b) Check that the converter is cool.
(c) Disconnect the heated oxygen sensor.
HINT:
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At the time of installation, please refer to the following items.
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Before installing the oxygen sensor, twist the sensor wire counterclockwise 3 and 1/2 turns.
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After installing the oxygen sensor, check that the sensor wire is not twisted.
If it is twist, remove the oxygen sensor and reinstall it.
(d) Remove the 2 bolts and exhaust pipe stay.
Torque: 33 N.m (330 kgf.cm, 24 ft.lbf)
(e) Remove the 2 bolts and disconnect the bracket.
Torque: 33 N.m (330 kgf.cm, 24 ft.lbf)
(f) Remove the 2 bolts and 2 nuts holding the front exhaust pipe to the tailpipe.
Torque: 56 N.m (570 kgf.cm, 41 ft.lbf)
(g) Remove the 4 nuts holding the front exhaust pipe to the exhaust manifolds.
Torque: 62 N.m (630 kgf.cm, 46 ft.lbf)
(h) Remove the front exhaust pipe (converter) and 3 gaskets.
HINT: At the time of installation, please refer to the following items. Install 3 new gaskets.
2. INSTALL CONVERTER
Installation is the reverse order of removal.