Armada 4WD V8-5.6L (VK56DE) Flex Fuel (2009)
e. Remove the exhaust studs from positions 2, 4, 6, 8 and remove RH exhaust manifold.
INSPECTION AFTER REMOVAL
Surface Distortion
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Check the flatness of each exhaust manifold flange surface using suitable tools.
Flatness limit : 0.3 mm (0.012 in)
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If measurement exceeds the limit, replace the exhaust manifold.
INSTALLATION
Installation is in the reverse order of removal.
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Install new exhaust manifold gasket with the top of the triangular up mark on it facing up and its coated face (gray side) toward the exhaust
manifold side.
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Tighten the exhaust manifold nuts in the numerical order shown.
Then recheck the torque of the nuts both (A) and (B).
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White Arrow : Front
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Before installing new air fuel ration A/F sensors, clean the exhaust system threads using Tool and apply antiseize lubricant.
CAUTION:
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Do not over tighten the air fuel ratio A/F sensors. Doing so may cause damage to the sensor, resulting in the MIL coming on.