Can you put a fan clutch on backwards?
More About Engine Fans. A word about installation: It is possible to install an engine fan backwards. Contrary to popular belief, a fan installed backwards does not move air in the opposite direction. Here is a picture of a fan correctly installed on its drive.
How can I tell if my Clutch is bad with the fan off?
Check for slop in the clutch. With the engine off and the fan stopped, try to rock the fan blade fore-aft to feel for free play in the clutch. Don’t confuse this with flex in the blade. If the fan moves half an inch or more, something’s wrong inside the clutch.
What happens to the fan clutch at high speeds?
At low and idling speeds, the clutch allows the fan blade to turn at almost a 1:1 ratio. At high speeds, the silicone fluid within in the clutch will lose its ability to transfer the energy from the shaft to the fan clutch body (and therefore, the fan) and the fan is then allowed to almost free-wheel, removing its load from the engine.
How is the direction of a fan determined?
The direction a fan blows air is always determined by (A) the shape of the blades (sometimes called propellers) and (B) the direction they turn. If a blade is angled down and the fan turns in the same direction as the blade angle, it will blow forward.
How does a non thermal fan clutch work?
Non-Thermal Fan Clutches. Non-thermal clutches operate solely based on the shaft speed of the water pump. At low and idling speeds, the clutch allows the fan blade to turn at almost a 1:1 ratio.
Check for slop in the clutch. With the engine off and the fan stopped, try to rock the fan blade fore-aft to feel for free play in the clutch. Don’t confuse this with flex in the blade. If the fan moves half an inch or more, something’s wrong inside the clutch.
At low and idling speeds, the clutch allows the fan blade to turn at almost a 1:1 ratio. At high speeds, the silicone fluid within in the clutch will lose its ability to transfer the energy from the shaft to the fan clutch body (and therefore, the fan) and the fan is then allowed to almost free-wheel, removing its load from the engine.
The direction a fan blows air is always determined by (A) the shape of the blades (sometimes called propellers) and (B) the direction they turn. If a blade is angled down and the fan turns in the same direction as the blade angle, it will blow forward.
Non-Thermal Fan Clutches. Non-thermal clutches operate solely based on the shaft speed of the water pump. At low and idling speeds, the clutch allows the fan blade to turn at almost a 1:1 ratio.