Then, the current problem may be a turbo seal.
However, you have the problem of your turbos contiunously failing. When your engine goes into regeneration (Cleaning exhaust filter on the instrument panel screen) it raises the exhaust temperature thousands of degrees by the use of flaming diesel fuel, which goes through your turbo into the exhaust and through the DPF. The reason your turbos keep failing is because of constant backpressure from a clogged DPF triggering the sensor to tell the engine to keep regenerating.
The excessive regeneration will fry your turbos and blow seals. And eventually cause catastrophic engine damage.
I know this guy and his videos are not liked much on these forums but he is a powerstroke expert and you need to watch this video.
The truck in this video experienced the same problems as you and ended up needing a new engine!
Your DPF needs replaced every 60-100,000 miles, yours is clogged and needs deleted, cleaned, or repaced.
Deletion costs the same as replacement, yet it eliminates the need to replace in the future. It also elminates the chance of catastrophic engine damage due to regneration and it will keep you from having to buy new turbos (but your current ones need fixed now).
I get all my performance parts and got my dpf delete with Spartan tuner from www.rivercitydiesel.com
. Very nice guys, fast shipping, good customer service. Give them a call and they'll tell you everything you need to know.