Xterra 4WD V6-3.3L SC (VG33ER) (2003)
Catalytic Converter: Service and Repair
Catalytic Converter
Removal and Installation
CAUTION:
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Always replace the exhaust tube gaskets with new ones when reassembling the system.
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With the engine running, check all of the exhaust tube connections for exhaust gas leaks, and the entire system for any unusual noises.
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Check to ensure that the mounting brackets and mounting insulators are installed properly and are free from undue stress. Improper installation
could result in excessive noise or vibration.
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Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 inch) onto a hard surface such as a concrete
floor, replace it with a new one.
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Before installing a new oxygen sensor, clean the exhaust tube threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and
approved anti-seize lubricant.
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Do not over-tighten the oxygen sensor. Over-tightening may cause damage to the oxygen sensor, resulting in the MIL coming on.