ive noticed when my fan kicks on in my truck when im sitting at idle at a light or something it shakes the whole truck. makes a thud noise too- its never done that before. i have 72k on my truck. am i just now noticing it or is this normal and im making a issue out of it?

 

i've heard that they do come apart havent had it happen to me but some have on the site

 

Broken fan blade or bearing is going.

 

how can i check the bearing in the fan? none of the blades SHOULD be broke..

 

Things happen! Have you even looked at it yet? If blades are bent/broken, I suggest replace all components of fan. They do come apart and go through radiator. Bearing test is move blade fore and aft for excess movement. 3/8 inch movement is probablly too much.

 

When my fan is running at an idle I can see that it has some play from front to back. It seems that bearings might be the cause of my issue as well. I have not attempted to estimate the total range of motion it makes. I was about to post a thread about my issues. I'll have to look into it more thoroughly. Only 50,000 miles seems funny that the bearings would be bad already.

 

When running your fan may wobble a little when disengaged. It's normal. Turn the truck off and grab a blade with your hand. If a bearing is going there will be a noticable loosness.

 

there is no play if you wiggle it back and forth.... i take it the fan should spin freely when the truck is off?

 

Acutally No, it dosen't spin real free, if it does the fan clutch is bad.


Edited: If you spin the fan it should not make one revolution.