How do you test a viscous fan coupling?

To confirm the diagnosis, start with this simple test: Spin the fan as hard as you can on an engine that has not been started that day. If the fan rotates more than five times, you can bet the clutch is bad. You should feel some resistance and the fan may spin up to three times, depending on the ambient temperature.

What is a viscous fan coupling?

Viscous fan couplings are located between the water pump pulley and the radiator. They: Control fan speeds to aid engine cooling. Aid in the efficiency of the engine by engaging the fan, when necessary. Reduce load on the engine.

Can a fan clutch be rebuilt?

You can rebuild your fan clutch with a seal kit to replace the damaged seals and fuse once the air supply issue is fixed. You may choose to completely rebuild your fan clutch as well.

Is my viscous fan working?

When your motor is hot, you should be able to hear the fan kick in. If you can’t, pop the bonnet, and turn the vehicle off while watching the fan. If it comes to a fairly abrupt stop, the fan hub is working properly. If it keeps spinning round and round, your fan hub is knackered and needs to be repaired or replaced.

How do I know if my viscous fan is working?

How do you know if its working properly? When your motor is hot, you should be able to hear the fan kick in. If you can’t, pop the bonnet, and turn the vehicle off while watching the fan. If it comes to a fairly abrupt stop, the fan hub is working properly.

What does the viscous fan do?

Viscous fan drives not only perform the essential cooling service of a fan drive, but also operate at variable speeds. This gives them a competitive advantage over fixed fan drives. Viscous fan drives engage and disengage less frequently than their fixed-speed counterparts, which: Reduces clutch wear.

Will a fan clutch tighten itself?

it will tighten itself down just fine.

Can you lubricate a fan clutch?

Fan Clutch The bearings that support the drive shaft for this clutch regularly experience high temperatures. Krytox™ lubricants have low volatility and high viscosity, providing long life and excellent lubrication to the fan clutch bearing under these high temperature conditions.

Can a faulty viscous fan cause overheating?

Decrease in power, acceleration, and fuel efficiency A faulty fan clutch that leaves the fan permanently engaged will not only cause a noisy engine, but can also cause a decrease in performance. When it fails, the engine can be put at risk of serious damage due to overheating.