Turbo Issue?

[flyisom]

I have a bone stock1999 F-250 it has 180000 miles on it I have noticed when I turn my truck off at the exhaust you can still hear my turbo spinning for about 10 to 20 seconds. I have never heard any other powerstrokes do that. Does anyone know if its normal or can it hurt the engine?

[Dietoremain]

do you let it idle down before you turn it off? your turbo is still spinning.. but for that long? i hear mine maybe a few seconds after.

[flyisom]

I park it cut it off and by the time i walk around the truck its still doing it for atleast 10 more seconds

[no-tel-in]

Normal, that means your turbo is pretty healthy, If you pull the intake off and look at the wheel, you can watch it spin for 5-25 seconds depending on truck, and shape of the turbo