How to tell if i fan clutch is defective 1 check for oil streaks or dust collected on oil streaks on the fan clutch.
Jeep wrangler fan clutch test.
2 check for a worn bearing grasp the fan blade on either end with the engine off and check for lateral movement.
If you are doing the work yourself all of the above will be well under 500.
This shows how to replace and install a fan clutch using test mule jeep wrangle.
I m sure a lot of people will disagree with me on this but if it was my jeep i would just go ahead and replace the water pump thermostat and fan clutch and see where you are at that point.
It s a sure sign that the internal fluid that provides the clutch action is leaking.
If still a problem then i d change out the radiator.
This how to video is on how to replace fan clutch full easy install guide.
It would need to be far more worn before you would notice it doing that test.
How to tell if a fan clutch is defective.
2 check for a worn bearing.
The fan clutch is not an expensive part and it is difficult to test.