Component Inspection

INSPECTION





1. WATER PUMP ASSEMBLY
a. Visually check the air hole and water hole for coolant leakage.
If leakage is found, replace the water pump and timing belt.
b. Turn the pulley, and check that the water pump bearing moves smoothly and quietly.
If necessary, replace the water pump.





2. FLUID COUPLING ASSEMBLY
a. Check that the fluid coupling is not damaged and that no silicon oil leaks. If necessary, replace the fluid coupling.





3. FAN BRACKET SUB-ASSEMBLY
a. Check the turning smoothness of the fan pulley.
If necessary, replace the pulley bracket.





4. THERMOSTAT

HINT: The thermostat is numbered with the valve opening temperature.





a. Immerse the thermostat in water an gradually heat the water.
b. Check the valve opening temperature.
Valve opening temperature: 80 - 84°C (176 - 183°F)
If the valve opening temperature is not as specified, replace the thermostat.





c. Check the valve lift.
Valve lift: 10 mm (0.39 inch) or more at 95°C (203°F)
If the valve lift is not as specified, replace the thermostat.
d. Check that the valve is fully closed when the thermostat is at low temperatures (below 77°C (171°F)). If not closed, replace the thermostat.
5. RADIATOR CAP SUB-ASSEMBLY

NOTICE:
- If the reservoir cap has contaminations, always rinse it with water.
- Before using a radiator cap tester, wet the relief valve and pressure valve with engine coolant or water.





a. Using a radiator cap tester, slowly pump the tester and check that air is coming from the vacuum valve.
Pump speed: 1 push / (3 seconds or more)

NOTICE: Push the pump at a constant speed.

HINT: Pump speed: 1 push / (3 seconds or more)

If air is not coming from the vacuum valve, replace the reservoir cap.
b. Pump the tester and measure the relief valve opening pressure.
Standard opening pressure: 93 - 123 kPa (0.95 - 1.25 kgf/cm2, 13.5 - 17.8 psi)
Minimum opening pressure: 78 kPa (0.8 kgf/cm2, 11.4 psi)

NOTICE: This pump speed is for the first pump only (in order to close the vacuum valve). After this, the pump speed can be reduced.

HINT: Pump speed: 1 push within 1 second.

Use the tester's maximum reading as the opening pressure.
If the opening pressure is less than minimum, replace the reservoir cap.