My turbo has started to chuff, how long till?

The isx is a bit of a pain compared to older motors. You have to drain coolant below the level of the turbo. The easiest way I've found to get the front inside nut off,is with a long extension and wobble. For the coolant lines,stubby wrenches come in handy.

 

I don't know about OP's experience, but the KW I'm driving now 'chuffs' on a regular basis. Usually when I let off the throttle, I get a PSHEWWW noise as the pressure on the intake releases.

I drove a Volvo with a Cummins CNG engine where the turbo would chuff with every shift. Let off the throttle, press the clutch, and you'd hear a CHOOFF Choof choof noise from the turbo.

My company's mechanics were astounded, as they had always equated turbo 'chuffing' with 'bad things', but apparently the newer engines' turbos 'chuff' as a normal part of operation.

 

Compressor stall happens with a sudden reduction in throttle from high boost levels. It's more common now on variable turbos though as they run more boost in all conditions. What's happening is the reduced drive pressure can't maintain the turbine speed, and the backpressure from the intake system blows back out the compressor wheel. It can be a handy way to clean the air filter-
On an ISX, this is a good opportunity to save some labor and have the EGR cooler done as well. The turbo and manifold have to come off for that job.

 

This is what happened when I didn't check my turbo, like everyone says they let go at the most inconvenient time and mine sure did, in the middle of nowhere and I was doing an oilfield hot shot. If you think there is the slightest chance of a problem, replace it.

 

https://video.search.yahoo.com/vide...jecn5&age=1336138521&fr2=p:s,v:v&fr=ipad&tt=b

 

Surprised how long it takes to seize.

 

Yeah it does. The first truck I drove after my return on the road had this happen in a truck stop, the seal let loose with no warning. It took a little bit (I think about 4 minutes) to drain all the oil out of the sump and use it for fuel, then it just came to a slamming halt. When they pulled the engine out they pulled it apart, the piston domes looked like they started to melt, the rod bearings were so scored that they were down to the base metal and the mains were worse. I don't remember which rods were bent but I think there were three.

 

If the turbo is dry, and it is a fitting problem, then it may be a problem easily fixed, like replacing the fitting and hose. BUT I would get it done now, it is a violation if you go through a level one and may be put OOS if it can't be fixed right away.

 

"The cops won't let me get near it!"

Cops sitting in car.

Translation - "I'm afraid of trying to save the motor"