Cummins diesel engines. While it's safe to say a majority of Clessie's loyalists firmly believe that all of the brand's I-6 powerplants truly are the greatest things that ever happened to diesel, the ...

Anyone that’s popped a clutch cover off an engine or removed camshafts to swap valve shims is familiar with the steel dowel pins manufacturers use to keep critical components and gaskets aligned.

Cummins engines are thought to be completely indestructible. In practice, however, there are two fatal flaws that not only damage these engines but can ruin them beyond repair. The first such weakness ...