As you know, I am new to the board. My Ram is 2 weeks old. Leaving work last night, about a mile in to the trip I heard a humming coming from the engine compartment. It stopped after a few seconds. I figured it had to do with the extremely cold weather we are having. Has this happened to anyone else here ?</P>

 

If it was cold, that is the fan clutch. It goes away in less than a block

 

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Thank you, it does go away quickly. What is a fan clutch ???</P>

 

The fan clutch controls the fan behind the radiator(connected to the motor). It regulates the method in which it spins. Locked or Free, free is not completely free, there is a certian amount of drag. The roar is that clutch engaged, then disengaging after about 5-10 sec. Most noticeable when cold out.

 

Thanks for the question and response guys.... I've heard the same thing in my '04 and wondered what it was. I figured since it went away so quickly it was nothin' to worry about, but nice to know. Thanks again.... Tim <IMG src=smileys/smiley32.gif border="0">

 

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Thanks, Knowledge is Power. It happens when the weather is below 10 degrees and goes away after warm-up.</P>


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Tim. Glad to see it is happening in other Rams. Misery loves company.</P>

 

I am not sure below what temp this occurrs, I only notice it in the winter/fall.