i have a 2005 f350..89000 miles...new egr, oil cooler and turbo installed 6 months ago. i have a loud whistling noise on acceleration and when i let of. not blowing coolant out degas bottle..no fluid loss..no loss of power. Truck runs great. was thinking either head gaskets or maybe y or up pipes cracked. any ideas???

 

Most likely the pipes. Check the bellows and each connection point.

 

Are you smelling any exhaust in the cab? it is common to smell it when the Y pipe is cracked.

 

definitely cracked y pipe

 

Thanks for the reply guys..no smell inside but yes around the front and under the hood.

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you were right heavy assault....top bellow was worn out...thanks for your help...all repaired now...have to say.. i do kinda miss the cool turbo sound. thanks again