Xterra 2WD V6-4.0L (VQ40) (2005)
Exhaust Manifold
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If stud bolts were removed, install them and tighten to the specified torque.
Exhaust manifold stud torque: 14.7 Nm (1.5 kg-m, 11 ft. lbs.)
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Install exhaust manifold and tighten nuts in numerical order as shown.
NOTE: Tighten nuts No. 1 and 2 in two steps. The numerical order No. 7 and 8 shown second step.
Heated Oxygen Sensor
CAUTION:
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Before installing a new air fuel ratio sensor 1 and heated oxygen sensor 2, clean exhaust system threads using oxygen sensor thread cleaner and
apply anti-seize lubricant.
Tool number:
J-43897-12
J-4389718
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Do not over torque air fuel ratio sensor 1 and heated oxygen sensor 2. Doing so may cause damage to air fuel ratio sensor 1 and heated oxygen
sensor 2, resulting in the "MIL" coming on.