QX4 2WD V6-3.5L (VQ35DE) (2003)
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Do not rotate crankshaft and camshaft separately, or valves will strike piston heads.
CAUTION: Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between d1 and d2 exceeds the
limit, replace them with new ones.
Limit (d1 - d2): 0.11 mm (0.0043 inch)
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If reduction of outer diameter appears in a position other than d2, use it as d2 point.
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Lubricate threads and seat surfaces of the bolts with new engine oil.
5. Install cylinder head outside bolts.
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Tightening procedure:
a. Tighten all bolts to 98.1 Nm (10 kg-m, 72 ft. lbs.).
b. Completely loosen all bolts in reverse order shown.
c. Tighten all bolts to 34.3 to 44.1 Nm (3.5 to 4.4 kg-m, 25 to 33 ft. lbs.).
d. Turn all bolts 90 to 95 degrees clockwise. [target: 90 degrees (angle tightening)]
e. Turn all bolts 90 to 95 degrees clockwise again. [target: 90 degrees (angle tightening)]
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Tighten in numerical order shown in the figure.