Car Repair World

Fan Clutch Working Of Fan Clutch System In Car Helpful Information A clutch fan can fail one of two ways, it can either be locking the fan to the clutch causing poor mileage and a whirring sound, (like an airplane is taking off.) Or the silicone grease can leak out causing the fan clutch not to lock up, allowing the fan to "freewheel", failing to pull air through the radiator, this failure usually is followed by the engine overheating. The clutch fan is utilized at slower speeds while air movement is diminished. Basic Checks (Engine "OFF".) Inspect the fan clutch for leakage from the front or rear of the unit, input shaft and temperature controlled expansion spring. If leakage is observed, the fan clutch has failed. Next, grasp the fan blade and turn it, the fan blade should free wheel with some resistance. If the blade spins with no resistance, or doesn't spin at all, the clutch has failed. History A clutch fan was developed in the late 1960...

Cooling System Working Of Vehicles Cooling System Helpful Information The engine's combustion chamber can reach temperatures of up over four thousand degrees Fahrenheit. About thirty percent of the fuel is converted into actual power, and the remaining seventy percent is developed into heat. A cooling system protects an engine from damage by transferring heat to the atmosphere by using the radiator. A correct operating temperature is critical for the proper function of the engine which is controlled by the thermostat. Car manufacturers have found that a 195° thermostat is optimum for efficiency. Below this threshold the catalytic converter will not work properly which will produce increased emissions. In the beginning, water was used for cooling systems, as it's the most efficient fluid to absorb and dissipate heat. The disadvantage of using water is that it freezes at a higher temperature and, boils at a lower temperature than coolant besides causing rust. Eventual...