Cummins’ venerable 5.9-liter diesel engine has undergone many revisions. Here are some highlights of each one. What is a ...

The 5.9L Cummins diesel engine is best known for its time when it powered Dodge trucks beginning in 1989, and it's an engine that certainly helped propel the Ram into being one of the top pickup ...

For many 5.9 Cummins owners, upgrading to a premium valve cover can make a significant difference in engine performance. John, a long-time Cummins truck owner, began experiencing oil leaks and a ...