Inspection

INSPECTION
1) Check engine coolant pump bearing for smooth rotation.
2) Check engine coolant pump pulley for abnormalities.





3) Using a dial gauge, measure impeller runout in thrust direction while rotating the pulley.

"Thrust" runout limit:
0.5 mm (0.020 in)





4) Check clearance between impeller and pump case.

Clearance between impeller and pump case:
Standard
0.5 - 0.7 mm (0.020 - 0.028 in)
Limit
1.0 mm (0.039 in)

5) After engine coolant pump installation, check pulley shaft for engine coolant leaks. If leaks are noted, replace engine coolant pump assembly.