Grand Vitara LTD 2WD V6-2.5L (2001)
Fan Clutch: Description and Operation
COOLING FAN CLUTCH
Fluid is enclosed in the cooling fan clutch and at its center front, there is a bimetal whose thermal reaction and the engine speed control the cooling fan
speed.
The relation between the temperature detected by the fan clutch and operation of the fan clutch is as follows.
While the fan clutch detects a temperature lower than 50°C, it remains OFF and the fan revolution speed is constant (400 to 900 r/min. (rpm): J20
and H25 engines, 600 to 1,300 r/min. (rpm):
G16 engine) regardless of the engine speed. As the temperature reaches 50°C to 70°C, the fan clutch turns ON gradually and the fan revolution speed
increases.
A temperature exceeding 70°C causes the fan clutch to turn ON and the fan revolution speed to increase in proportion with the engine speed.
Once the engine speed exceeds 4,000 r/min. (rpm), however, the fan revolution speed becomes constant (2,350 to 2,650 r/min. (rpm): J20 and H25
engines, 2,800 to 3,100 r/min. (rpm): G16 engine).
CAUTION: Do not disassemble fan clutch.
