M35x AWD V6-3.5L (VQ35DE) (2007)
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Check the surface distortion of the exhaust manifold mating surface with a straightedge and a feeler gauge.
Limit: 0.3 mm (0.012 in)
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If it exceeds the limit, replace exhaust manifold.
INSTALLATION
Note the following, and install in the reverse order of removal.
Exhaust Manifold Gasket
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Install in direction shown below. (Follow same procedure for both banks.)
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Locate thick side of port connecting part on right side from technician's view.
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Locate round press in thick side of port connecting part above center level line of port.
Exhaust Manifold
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If stud bolts were removed, install them and tighten to the specified torque below.
Torque: 14.7 Nm (1.5 kg-m, 11 ft-lb)
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Install exhaust manifold and tighten mounting bolts in numerical order as shown in the figure.
NOTE: Tighten nuts No. 1 and 2 in two steps. The numerical order No. 7 and 8 shows second step.
Air Fuel Ratio Sensor
CAUTION:
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Before installing a new air fuel ratio sensor, clean exhaust system threads using heated oxygen sensor thread cleaner tool (Commercial
Service Tool: J-43897-18 or J-43897-12) and apply anti-seize lubricant.
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Do not over torque air fuel ratio sensor. Doing so may cause damage to air fuel ratio sensor, resulting in the "MI" coming on.