1. INSPECT WATER PUMP ASSY
(a) Visually check the drain hole for coolant leakage.
(b) Turn the pulley, and check that the water pump bearing moves smoothly and noiselessly.
If the bearing moves roughly or noisily, replace the water pump assy.
(c) Visually check the air holes for coolant leakage.
If leakage is found, replace the water pump assy.
if engine coolant has leaked onto the timing belt, replace the timing belt.
On-vehicle inspection
1. INSPECT COOLING SYSTEM FOR LEAKS
(a) Remove the radiator cap.
CAUTION:
Do not remove the radiator cap while the engine and radiator
are still hot. Pressurized, hot engine coolant and steam
may be released and cause serious burns.
(b) Fill the radiator with coolant and attach a radiator ...