Altima V6-3.5L (VQ35) (2003)
1. Check for badly rusted or corroded water pump body assembly.
2. Check for rough operation due to excessive end play.
INSTALLATION
1. Install new O-rings to water pump.
2. Apply engine oil and coolant to the O-rings as shown.
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Locate the O-ring with white paint mark to engine front side.
3. Install the water pump.
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Do not allow cylinder block to interfere with the O-rings when installing the water pump.
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Check that timing chain and water pump sprocket are engaged.
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Insert water pump by tightening mounting bolts alternately and evenly.
Water pump mounting bolts: 8.5 - 10.7 Nm (0.86 - 1.10 kg-m, 75 - 95 inch lbs.)
4. Remove dust and foreign material completely from backside of chain tensioner and from installation area of rear timing chain case.
5. Turn the crankshaft pulley approximately 20° clockwise so that the timing chain on the timing chain tensioner side is loose.
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When installing the timing chain tensioner, engine oil should be applied to the oil hole and tensioner.
6. Install the timing chain tensioner.
Timing chain tensioner mounting bolts: 7.0 - 9.3 Nm (0.71 - 0.95 kg-m, 62 - 82 inch lbs.)