Symptoms when brought in: runs rough, black smoke, knocking (sounded like injector not bearings), code - turbo actuator not functioning or out of calibration (don't quote me on the wording of the code.
Work done:
Checked turbo impeller - loose but spin. Actuator would not move. Removed turbo - aluminum pcs fell out of exh side while on the bench - then actuator started moving a little. Replaced turbo assy with factory unit (ouch $2400 at only 6000 plus hours).
Started unit - ran normal for a about 10 seconds, but has a little black smoke. Then started running a little rough and smoke increased. Killed the engine and took a look around - no codes in the Magnum controller.
Restarted - hard to start, lots of black smoke. After reaching RPMs knocking started and more smoke. Killed unit
Now it will not start - no codes visible.
Check to make sure turbo impeller moved freely - it is OK.
Opened oil filter - no metal visible.
Why would it run normal at first? Then go bad
Work done:
Checked turbo impeller - loose but spin. Actuator would not move. Removed turbo - aluminum pcs fell out of exh side while on the bench - then actuator started moving a little. Replaced turbo assy with factory unit (ouch $2400 at only 6000 plus hours).
Started unit - ran normal for a about 10 seconds, but has a little black smoke. Then started running a little rough and smoke increased. Killed the engine and took a look around - no codes in the Magnum controller.
Restarted - hard to start, lots of black smoke. After reaching RPMs knocking started and more smoke. Killed unit
Now it will not start - no codes visible.
Check to make sure turbo impeller moved freely - it is OK.
Opened oil filter - no metal visible.
Why would it run normal at first? Then go bad
JD 6068 in Magnum 235 - turbo replaced, ran good, then rough, now will not start.
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