how to diagnose clutch fan???

[uss2defiant]

How would one tell if the clutch fan is still function and engaging at the right conditions?

 

[CzarKJ]

How would one tell if the clutch fan is still function and engaging at the right conditions?

This is what I went with from hayden.

http://www.haydenauto.com/upload/HaydenAuto/Documents/Cat_Hayden/Hayden%20Fan%20Clutch%20Design%20Types.pdf

 

[uss2defiant]

I found that too but there's no specifics to temperature.

 

[tjkj2002]

How would one tell if the clutch fan is still function and engaging at the right conditions?

The OE clutch fan is a AUX cooling fan and fully locks when it reaches 230 degrees(fluid inside clutch).

 

[uss2defiant]

The OE clutch fan is a AUX cooling fan and fully locks when it reaches 230 degrees(fluid inside clutch).

I see.
Now when it engages, is it as loud as during start ups?


Thanks

 

[Billwill]

I see.
Now when it engages, is it as loud as during start ups?


Thanks

With the engine cold and turned off you should be able to move the fan with only a little resistance with your hand.

When the engine is very hot and turned off the fan should show much more resistance when moved by hand.

A trick we used to do on the old E30 BMW was to carefully plunge a rolled up newspaper into the spinning fan when the engine was hot...if the fan stops then the viscous clutch is shot....if the fan easily shreds the rolled up newspaper then the clutch is OK. I have not tried this on a Jeep so do so at your own risk...rather replace with a new Hayden clutch...most reports of the Hayden that I have seen are pretty good as far as the CRDs go!

 

[uss2defiant]

interesting way to check whether the fan engages.

 

[CactusJacked]

And a good way to make confetti. A 2x4 would make less of a mess, but I can't imagine either one would be good for the fan blades.

 

[blackhawk]

I see.
Now when it engages, is it as loud as during start ups?


Thanks

Yes, it's quite loud as during start ups when the engage is at the highest range.

 

[flair1111]

i always wondered what the loud sound was at start up. now i know. i just never looked at the fan.