Sentra SE-R Spec V L4-2.5L (QR25DE) (2002)
Water Pump: Service and Repair
REMOVAL
WARNING: Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the
radiator.
Water Pump
1. Drain the engine coolant.
CAUTION: Perform when the engine is cold.
2. Remove the alternator.
3. Remove the water pump.
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Coolant will leak from the cylinder block, have a drain pan in position.
CAUTION:
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Handle the water pump vane so that it does not contact any other parts.
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The water pump cannot be disassembled and should be replaced as a unit.
4. Remove the water pipe mounting bolts.
5. Remove the water pump housing from the engine block. Use a new gasket for installation.
Water Pipe
1. Remove the water pump.
2. Remove the exhaust manifold.
3. Remove the water pipe from the thermostat housing.
INSPECTION AFTER REMOVAL
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Visually check that there is no significant dirt or rust on the water pump body and vane.
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Check that there is no play when rotating the vane shaft, and that it turns smoothly when rotated by hand.