QX4 2WD V6-3.5L (VQ35DE) (2003)
10. After confirming the mating marks are aligned, tighten the camshaft sprocket mounting bolts.
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Secure the camshaft hexagonal head using a spanner to tighten mounting bolts.
11. Pull out the stopper pin from the secondary timing chain tensioner.
12. Install primary timing chain.
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Install crankshaft sprocket, with mating mark to timing chain facing front of engine.
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Install primary timing chain so that mating mark (punched) on camshaft sprocket is aligned with that (dark blue link) on the timing chain, and
mating mark (notched) on crankshaft sprocket is aligned with that (orange link) on the timing chain, respectively.
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When it is difficult to align mating marks of the primary timing chain with each sprocket, gradually turn the camshaft hexagonal head using a
spanner so it is aligned with the mating mark.