WATER PUMP ON-VEHICLE INSPECTION


  1. INSPECT FOR COOLANT LEAK

    Tech Tips


    • The sliding surface inside the engine water pump assembly is lubricated by engine coolant. As some engine coolant is discharged during normal operation, coolant residue (solids) may be found on the drain plug or the bottom of the engine water pump assembly. Engine coolant may leak if foreign matter enters the engine water pump assembly, however the sealing performance will recover when the foreign matter is pushed out or breaks into fine pieces.

    • Before performing this inspection, check that there is no coolant leaking from any parts other than the engine water pump assembly. If there are leaks, inspect those areas.

    • Perform this inspection when the engine is cold.


    1. Visually check the engine water pump assembly.


      1. Check that engine coolant is not dripping from the engine water pump assembly.

        Tech Tips


        • If engine coolant is dripping, replace the engine water pump assembly.

        • If engine coolant is not dripping, perform the following check.

    2. Inspect the area around the water pump.

      Tech Tips

      Check for deposits around the drain hole of the water pump.


      1. A01592PE01
        Text in Illustration
        *1 Water Pump Pulley
        *2 Drain Hole

        Press the thin paper towel against the coolant (solid matter) adhering to the drain hole or the edge of the drain hole, and check the condition of the thin paper towel.

        Tech Tips


        • If the thin paper towel is wet, replace the water pump assembly.

        • If the thin paper towel is dry, thoroughly clean the area around the water pump.

  2. INSPECT WATER PUMP ASSEMBLY


    1. Remove the fan and generator V belt Click here.

    2. A0155PM

      Turn the pulley and check that the water pump bearing moves smoothly and quietly.

      If necessary, replace the water pump.

    3. Install the fan and generator V belt Click here.