How to tell if a water pump is defective
 

How to tell if a water pump is defective

1. Check for shaft seal failure by carefully inspecting the water pump weep hole. When a water pump is new, some seepage is normal in the initial hours of operation as the seal seats. Other than that, any leakage that occurs is due to seal failure and the pump needs replacement. There may be trails of rust, calcium and
coolant deposits on the water pump housing with the weep hole as the origin.

2. Detect a worn water pump bearing by checking for side-to-side play at the shaft. There should be no play as you apply hand pressure to the shaft, bearing wear is sounds like a screeching or rumbling noises coming from the water pump housing. If any of these conditions exist, the bearing is worn out and the pump should be replaced.

The checkout of such type of stuffs are been quite and very good and been very important necessity.