Cooling Fan Question- Is my clutch out?

[Shane3507]

I started talking about this in another thread but didn't mean to hijack it.

Last weekend on a 3 hr trip back to school, my truck got up into the 210-215 range for both my EOT and ECT. I was unloaded driving 70 MPH. I had never seen it get above 205 before when it was just as hot (100 F).

My fan can spin freely when the motor is off and spins when turned on. I have never heard it turn on and make the loud noise since I have owned the truck.

My question is that does the fan always turn at some variable rate to keep the engine cool and when it reaches say 220 F EOT, does it spin faster and make the loud noise that everyone talks about?

Thanks.

[dhanna6powerstroke]

The fan always turns some but is not spinning fast enough for cooling. It is electronically controlled to fully engage at a certain temp. I have only heard mine come on one time in 60k+ miles and that includes towing also.

[Lilpooh]

Also want to mention, the fan will kick on with other PCM readings, not only with ECT or EOT. Read Bismic's post #2 on this link.
Easy Fan Clutch question

[Shane3507]

Alright, thanks for the help guys. I don't think I'm gonna take it to the dealer in the morning to have it looked at anymore. My temp spread has never been a problem. My factory warranty is up on the 22nd of April. I might still take it in by then and just pull some diagnostics on it.

BTW, just took a road trip that was a little over an hour and drove the truck pretty hard and never saw the EOT go above 199. Tranny temp also kept around 150 so I am feeling pretty good about it now.

[dhanna6powerstroke]

Originally Posted by Shane3507

Alright, thanks for the help guys. I don't think I'm gonna take it to the dealer in the morning to have it looked at anymore. My temp spread has never been a problem. My factory warranty is up on the 22nd of April. I might still take it in by then and just pull some diagnostics on it.

BTW, just took a road trip that was a little over an hour and drove the truck pretty hard and never saw the EOT go above 199. Tranny temp also kept around 150 so I am feeling pretty good about it now.

I would take it in 2-3 times before the 22nd just to get it documented. That way, if you have an issue out of warranty they can see the claims already against it.

[Shane3507]

That's a great idea- unless they kick me out the first time for having CAT ELC or turbo-back straight pipe.

[dhanna6powerstroke]

Originally Posted by Shane3507

That's a great idea- unless they kick me out the first time for having CAT ELC or turbo-back straight pipe.

They have to prove that is causing the failure. Exhaust and coolant won't void the warranty. If they give you a hard time just find another dealer.