Inspection After Removal

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Visually check that there is no significant dirt or rust on the water pump body and vane.
Check that the vane shaft is not loose and turns smoothly when rotated by hand.
Replace the water pump, if necessary.

Fig 1: Checking Water Pump Vane Shaft Smoothness And Looseness
Courtesy of NISSAN NORTH AMERICA, INC.