Water Pump: Testing and Inspection

1. Inspect water pump.
Check that the water pump gasket surface is not cracked or damaged. If necessary, replace the water pump.





2. Inspect water pump bearing.

Turn the pulley and check that the water pump bearing moves smoothly and quietly. If necessary, replace the water pump. Check the impeller for shaft retention and pitting.

IMPORTANT: If there are signs (deposits [white film/stains]) of coolant weepage on the pump flange or powertrain cradle below the weep hole, this does not mean the pump's seal has failed. Only replace the pump when there is evidence of leakage, such as coolant on the pump flange, powertrain cradle, floor or in the water pump area.

3. Check the water pump weep hole for signs of leakage from the water seal. Make sure the weep hole is open and not plugged with grease.