Crank breakers wanted

Last week, a guy I work with was driving down the highway at 75MPH in his F250 with 6.7L diesel engine. This is a truck he bought new, always maintained, and had a little over 100K miles on. It is a 'cowboy Cadillac' truck, he never used it for much other than driving around in.

The engine light came on, the engine stopped running. He pulled over. A few hours later, the dealer they towed it to told him they could rotate the engine with the starter and the pulleys weren't rotating. After pulling the pan, they confirmed the crank was now a two-piece affair.


Damper and crank failures on Diesel engines is a real issue.

The VAST majority of broken cranks is because the damper was wrong for the application or it was worn out.

It would be interesting to see what type of damper was on that crank.