ENGINE COOLANT LEAK CHECK
| WARNING | When pressure testing the cooling system, slowly release cooling system pressure to avoid getting burned by hot coolant. |
| CAUTION | Be sure to completely clean away any moisture from the places checked. When the tester is taken out, be careful not to spill any coolant. Be careful when installing and removing the tester and when testing not to deform the filler neck of the radiator. |
Scheme 16
- Check that the coolant level is up to the filler neck. Install a radiator tester and apply 160 kPa (23 psi) pressure, and then check for leakage from the radiator hose or connections.
- If there is leakage, repair or replace the appropriate part.
RADIATOR CAP PRESSURE CHECK
Note. Be sure that the cap is clean before testing. Rust or other foreign material on the cap seal will cause an improper reading.
Scheme 17
- Use a cap adapter to attach the cap to the tester.
- Increase the pressure until the indicator of the gauge stops moving. Minimum limit: 64 kPa (9.2 psi) Standard value: 74-103 kPa (11-15 psi)
- Replace the radiator cap if the reading does not remain at or above the limit.
<< C >> RADIATOR UPPER HOSE/RADIATOR LOWER HOSE DISCONNECTION
Make mating marks on the radiator hose and the hose clamp. Disconnect the radiator hose.
>> A << RADIATOR LOWER HOSE/RADIATOR UPPER HOSE CONNECTION
- Insert each hose as far as the projection of the water inlet fitting.
- Align the mating marks on the radiator hose and hose clamp, and then connect the radiator hose.
Scheme 18
- Install the covers securely until the click can be heard from the four fixing points.
- Two lugs around the circumference of the covers should be seen on the outside of the shroud.
- After installation, check that the covers are fixed securely.
Scheme 19
Cooling Fan Check
- Check the blades for damage and cracks.
- Check for cracks and damage around bolt holes in the fan hub.
- If any portion of the fan is damaged or cracked, replace the cooling fan.
Fan Clutch Check
- Check to ensure that fluid in the fan clutch is not leaking at the case joint and seals. If fluid quantity decreases due to leakage, the fan speed will decrease and engine overheating might result.
- When the fan attached to the engine is turned by hand, it should have some resistance. If the fan turns lightly or freely with no resistance, it is faulty.
- Check the bimetal strip for damage.
Scheme 20
<< A >> RADIATOR LOWER HOSE DISCONNECTION
Make mating marks on the radiator hose and the hose clamp. Disconnect the radiator hose.
>> A << RADIATOR LOWER HOSE CONNECTION
- Insert each hose as far as the projection of the water inlet fitting.
- Align the mating marks on the radiator hose and hose clamp, and then connect the radiator hose.
Scheme 21
Scheme 22
- Immerse the thermostat in water, and heat the water while stirring. Check the thermostat valve opening temperature. Standard value: Valve opening temperature: 88 +/- 2°C (190 +/- 36°F)
- Check that the amount of valve lift is at the standard value when the water is at the full-opening temperature. NOTE: Measure the valve height when the thermostat is fully closed, and use this measurement to compare the valve height when the thermostat is fully open. Standard value: Full-opening temperature: 100°C (212°F) Amount of valve lift: 10 mm (0.39 inch) or more
Scheme 23
<< A >> RADIATOR UPPER HOSE DISCONNECTION
After making mating marks on the radiator hose and hose clamp, disconnect the radiator hose.
Scheme 24
>> B << WATER HOSE CONNECTION
To reuse the water hose, align the mating marks that were made during removal, and then install the hose clamp.
Water Pipe and Hose Check
Check the water pipe and hose for cracks, damage and clogs. Replace them if necessary.