LOUD under hood

[stewie2]

I have a 08' 6.4 and it has 6500 miles on it and it has developed a loud howl under the hood while under load, it sounds like a bad clutch on the fan but maybe wastegate?? I have this posted in a different spot also but no ideas there. If anyone can help me out thanks.

[TwinTurboStroker]

Originally Posted by stewie2

I have a 08' 6.4 and it has 6500 miles on it and it has developed a loud howl under the hood while under load, it sounds like a bad clutch on the fan but maybe wastegate?? I have this posted in a different spot also but no ideas there. If anyone can help me out thanks.

Where does it sound like it is coming from? The front of the motor, back by the dash, passenger side, driver side?

[stewie2]

I did some more searching and it seems most prominant right in the front.

[JEFF69Z28]

does it sound like bad bearings?and does it make the noise a couple of seconds after you shut off the motor?

[mschn99]

have you checked your coolant level? Im wondering if your raditator is leaking and your coolant is low....so the engine is commanding the fan clutch on......

[stewie2]

I had it in to the dealer and the clutch was bad on the fan, they replaced it and now it is good. thanks for the thoughts

[TwinTurboStroker]

Originally Posted by stewie2

I had it in to the dealer and the clutch was bad on the fan, they replaced it and now it is good. thanks for the thoughts

Good to hear everything was taken care of

[stewie2]

Well it has been 1200 miles since I had the clutch on the fan changed out and I already need another one, 8200 miles on truck and 2 clutches.