Cummins FAQ

Frequently Asked Questions about the 5.9L & 6.7L Cummins

 

What engine family do the 5.9 liter & 6.7 liter Cummins belong to?

The 5.9 & 6.7 liter Cummins engines belong to Cummins B-series line of engines. The B-series line of engines includes the following inline 4 & inline 6 engines: 6BT 5.9 L(12-valve), 5.9 L ISB, 3.9 L 4BT, and the B 6.7 L ISB.

How long has the Cummins been used in Dodge trucks?

The Cummins found its way into Dodge trucks in 1989. The 5.9L & 6.7L Cummins have been the diesel engine of choice for Dodge ever since.

What does ISB stand for?

ISB stands for Interact System B. Interact System describes the electronic controls system introduced to the Cummins engine in 1998, when the mechanical 5.9 L 12-valve was replaced with the computer controlled 24-valve ISB. The B in ISB signifies that the engine is part of Cummins "B-series" line up.

Who is the founder of Cummins Engine?

Clessie L. Cummins is the founder of Cummins Engine Co. He founded it in 1919, when his company was producing small diesel engines. It was not actually until 1930 that Cummins designed & produced its first successful diesel engine.