Xterra 4WD V6-4.0L (VQ40DE) (2009)
4. Tighten the rocker cover bolts in two steps in numerical order as shown.
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Arrow indicates Front
5. Install new O-ring and PCV valve to rocker cover (RH), if removed.
6. Install PCV hose.
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Insert PCV hose by 25 to 30 mm (0.98 to 1.18 in) from connector end.
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When installing, be careful not to twist or come in contact with other parts.
7. Installation of the remaining components is in the reverse order of removal.