Inspection After Removal

WARNING: This page is about a different car, the 2005 Infiniti QX56. 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.
Make sure there is no looseness in the vane shaft, and that it turns smoothly when rotated by hand.
Replace the water pump assembly, if necessary.

Fig 1: Inspecting Water Pump Body & Vane
Courtesy of NISSAN MOTOR CO., U.S.A.