Turbo failing?

[wheat straw]

Hello all, I have a Massey 4253 and while roading it hear I heard an odd noise that I couldnt make out. Alternator, air compressor, belt slipping. Just didnt think it sounded right for that. the noise wasnt constant. I brush hogged for about 2 1/2 hrs and all sounded normal. I stopped for a break and idlled it for a bit. Noticed the exhaust looked black and I could hear an abnormal whine. I throttled it up a bit and had an ugly black exhaust that seemed to clear up shortly. It has always been a clean burning engine. Headed to the barn and all seamed pretty normal until I idled it down to open the gate. Ugly smelly exhaust again. Throttled up and pulled under a nice shade at the barn and shut her down. Question, does this sound like the turbo and is that expensive. Not mechanical so will be paying from the hip pocket. Thanks for your input.
Andy

 

[wore out]

Turbo noise and sooty exhaust could indicate a hose or other connection between the pressure side of the turbo and the intake manifold has failed.

Is it aftercooled/intercooled, which ads a LOT more places for such a leak.

 

[wheat straw]

Thanks, will check

 

[danofarming]

When have you changed air filter? Check ALL of the connections to intake manifold for an air leak.

 

[504]

When a turbo seal goes bad you are lucky if you can get it to shut off. Oil can cause a runaway engine. My last Freightliner was running away and I was able to hold it back with the brakes till I could get off of the hwy,and killed it with the brakes.