Whirring noise at constant RPM only.

***scraph*** · #1 (**permalink**) 02-28-2008, 02:42 PM

I first noticed a whirring noise that would appear when cruising. It sounds like a cross between rushing air and two dry metallic surfaces continuously rubbing. The sound appears shortly after coming to a constant speed and "spins up". The sound disappears immediately when in gear and I remove my foot from the throttle ... it will also disappear when I put my foot into the throttle but seems to "catch" before it goes away. I initially suspected it was a transmission noise but I also can reproduce it with the clutch disengaged and the engine revved and held at a constant RPM so I believe that should isolate the source to the engine.

This is a 2000 F-250 w/ the 6-speed manual transmission. Any ideas?

dumokie · #2 (**permalink**) 03-04-2008, 08:27 PM

Mine was the pilot shaft bearing which was smoked!!

**Marty** · #3 (**permalink**) 03-04-2008, 08:45 PM

Turbo related from what you described.

I'll see if I can find my video...

**Marty** · #4 (**permalink**) 03-04-2008, 08:54 PM

Anything like this?

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