How do I know if my viscous fan is working?

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.

How can you tell if a clutch fan is bad?

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 happens to the fan on a Cummins ISX?

If it fails fan stays on Hshappy2 Thanks this. There is a switch on the front end of the engine that is air actuated. If it fails fan stays on Click to expand… 77fib77 Thanks this. This is the best job I have had.

Can a fan clutch be replaced in a Cummins Engine?

It is a temp fix only, and the fan clutch should be replaced when possible, but this trick will get you around for a while. The fan will now turn with the engine all the time. I hope you enjoy it. Please subscribe and click under the video on my name for all my other how-to videos.

Why is my truck cooling fan not turning off?

The fan clutch itself may be getting stuck, or have a bad air leak. With the a/c and defroster turned off, run the engine at idle. The fan should off once the engine has been running for a minute or two.

Why is my ISX cooling fan not shutting off?

Actually the ECM turns off power to the solenoid to lock the fan on. All you need is bad connection or wire in that circuit to cause this, or a faulty solenoid. The A/C high pressure switch and fan override switch are separate inputs to the ECM and could also be acting up. The fan clutch itself may be getting stuck, or have a bad air leak.