M45x AWD V8-4.5L (VK45DE) (2008)
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Visually check that there is no significant dirt or rusting on water pump body and vane.
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Check there is no looseness in vane shaft, and that it turns smoothly when rotated by hand.
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If anything is found, replace water pump.
INSTALLATION
Installation is the reverse order of removal.
INSPECTION AFTER INSTALLATION
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Check for leaks of engine coolant using radiator cap tester adapter (commercial service tool) and radiator cap tester (commercial service tool).
Refer to, "Inspection". See: Cooling System/Testing and Inspection/System Inspection
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Start and warm up engine. Visually check if there is no leaks of engine coolant.