I have a Job3 6.4L w/ about 5500 miles on it. I also have the Ford remote start which allows me to start/stop the truck outside of it.

Recently, I have noticed a whirling/rotating noise when the truck is shut off. This is more of a lower pitch, rather than higher. It also sounds like something with some mass is rotating. This is easily heard while standing next to the passenger side fender and turning the motor off. It lasts for about 3 - 4 seconds after the engine stops running. It is not the cooling fan, as it stops before the noise stops. It also doesn't sound like the turbo(s), as it seems to come from the front of the engine area.

Any ideas?

 

Turbo is still turning.

 

If it doesn't do it all the time,It is probably in Regen Mode when you shut it down and that is the noise you are hearing.

 

Its not in regen. Is it normal for the turbo to continue to turn? Has anybody else experienced this?

 

could be the cooler for the turbos.

 

I have similar noise and beleive its the cooling fan swirling around, had hood open and shut truck down heard noise and could see fan spinning. I dont know now never waited to see if it ended same time as fan stopped..

 

I did the same thing. The noise continues after the cooling fan stops.

 

It is the turbo still spinning until it stops. When the engine is running the turbos will spin up to 100,000 rpms. It takes a little while for them to quit turning when you shut down the motor.

 

Thanks for all the help. Guess it is normal and I won't worry about it!

 

 

I know the noise you are talking about. I always thought it had something to do with the regen BS? It only happens once in awhile on my truck. There is no way that sound is a turbo still spinning. What ever it is its bigger than a turbo.

 

The Diesel Supplement that comes with the owner's manual mentions a fuel and turbocharger cooling pump that may run for up to 10 minutes after shutting off the engine. I have not heard it on mine, but maybe that's the noise you're hearing.

 

This is more like a deep bearing sound if I have the same noise you are talking about. it is definitely something spinning after you turn it off and not a pump that stays on.

 

It's the turbo, you don't allways hear it because you can,t hear it sitting in the truck. If you open the hood on any diesel truck and run around front as soon as it's turned off you will hear it. At idle the turbo is spining about 20,000 to 30,000 RPM.