5.9-Liter Cummins: Second Generation (Late 12-Valve, 1994-1998, P7100 Injection Pump) In 1994, the 5.9-liter Cummins was similar in many ways to the 1989-1993 engine.

This 5.9-liter Cummins turbo diesel was pulled from a 2006 Dodge Ram 2500. It was running poorly at 368,000 miles. Significant damage was found to the pistons.

The first-gen 5.9-liter Cummins (6BT) wasn't the only diesel engine available for light-duty pickup trucks, but it was a game changer that worked wonders for boosting sales of Ram trucks.