Fan Clutch Without Thermostatic Control: Testing

In case of engine overheating during low car speed or idle operation, increase engine speed to approximately 1000 RPM in neutral gear. If condition is not corrected by increasing engine speed, replace fan drive unit with a unit that is known to be operating properly and test by operating vehicle under same conditions. Replace unit assembly if trouble is corrected with test unit. All units are non-adjustable and if damaged or not operating properly they must be replaced.