【Fault description】
    The engine is overheated. The engine runs for a long time idling, the results of water temperature table pointer rise, stop in the overheated area, after stopping the engine, a long time to return to normal.
    【Inspection process】
    Investigate the radiator cooling water tank, the water tank has been empty, open the radiator cover, radiator internal cooling water has also been reduced, so add 1 liter of cooling water, because the short term to reduce so much cooling water, so sooner or later disposal, From the external visual inspection there is no place to drain the cooling water, the results did not leak, the cylinder pad will not leak the cooling water, with the sound control instrument check, the instrument is no abnormal reaction.
    According to the provisions of the number of supplementary cooling water, and then let the engine idle for an hour after the water temperature table pointer gradually rose up, and then after an hour, the pointer rose to the dangerous red area, measuring the cylinder head temperature, cylinder head temperature and cooling water The same temperature, are 98 degrees. Test heater, heater no problem, indicating that the cooling water cycle is no problem.
    【Maintenance】
    Remove the radiator cover to observe the flow of cooling water to prove that the temperature regulator is operating normally. But the engine speed rise, the radiator of the electric fan air volume is relatively small, stop the engine survey. Although the cooling water temperature is high, but the fan clutch is slipping, remove the clutch that the silicone oil will flow out, but the results did not flow out and found the clutch has burned, there are signs of lock. It is estimated that after the clutch burned, the electric fan side of the side slip, a serious shortage of air flow, the effect of poor equipment, and thus the engine overheating. This car is also old, after years of use, so that parts aging, resulting in failure.