WATER PUMP ON-VEHICLE INSPECTION

PROCEDURE

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, engine coolant residue (solids) may be found on the drain plug or the bottom of the engine water pump assembly. Also, 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. In this case, check the area around the engine water pump assembly.

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

   • Perform this inspection when the engine is cold.

   
   

   1. Visually inspect the engine compartment for the following conditions.

      
      

      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. Remove the V-ribbed belt.

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   3. Inspect the area around the engine water pump assembly.

      Tech Tips

      Check for deposits around the drain plug of the engine water pump assembly.

      
      
      1. 

         *a	Water Pump Pulley
         *b	Drain Plug
         *c	Water Pump Pulley Hole

         Rotate the water pump pulley and align the water pump pulley hole with the drain plug.

         Tech Tips

         
         

         • The drain plug is at the bottom of the engine water pump assembly.

         • Use a mirror to check that the water pump pulley hole and drain plug are aligned.

   4. Press a piece of paper towel against the drain plug and check that the paper towel is not wet and that there are no deposits on the lip of the drain plug.

      
      

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

      • If the paper towel is not wet, thoroughly clean the area around the engine water pump assembly.

2. INSPECT ENGINE WATER PUMP ASSEMBLY

   
   

   1. 

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

      If necessary, replace the engine water pump assembly.

   2. Install the V-ribbed belt.

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