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Discussion Starter #1
I have a 02 f250 with the 7.3L, edge evolution, and a DIY intake. the other day i was on the highway and i was goin around 70mph and all of a sudden i start hearing this howling noise that sounded like a blower kicked on or something. Any ideas?
 

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It was probably the turbo. Were you ascending a hill?

Do you have an automatic or standard trans?

Woody
 

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I would check the intercooler boots, probably one sprung a leak.

Woody
 

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might have been your fan clutch.

most people dont realize how loud their fan is untill they hear the clutch spinning up the fan faster than usual.

do you live in a warm area?
 

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I would go for the fan also, if the turbo made that much noise it would need
replacing. Turbo is always spinning and should just make a bit more of
a whine under load. The fan when locked can make a bunch or noise.

Was probably 100+ out that day with the AC on high, right?
 

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Discussion Starter #8
ya it was around 100, and it would seem to make the noise for a couple of miles then stop and do it every once in awhile, i was doin 75 with the cruise set.
 

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Yep... that is the fan kicking in.
 

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The Irishman
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I wouldn't go as far as to say its broken... Its locked up to provide cooling when hot. A set of electrics would be to only upgrade persay or maybe a performance fan blade? I've seen a few that were pretty nice.:happymugs
 

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you dont have a problem, your fan clutch is doing its job.

Your fan doesnt spin as fast as the pully its connected to.

The clutch allows the fan to slip, olny spinning enough to pull the needed air through the radiator.

If you didnt have a clutch on the fan and it was mounted direct, you would hear that loud noise all the time and it would be working that hard for nothing, sucking up power too.

The clutch is heat activated, and when it feels more heat the clutch doesnt allow the fan to slip as much, making it spin faster drawing more air through the radiator.

when the temperature drops, the clutch lets the fan slip again slowing it down.

Living in Rhode Island, I rarely hear my fan unless its over 90 degrees.
 
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