What Caused This 6.7L Cummins to COMPLETELY Lock Up?
Published at : 23 Dec 2025
This 5th Gen 6.7L Cummins got towed into our shop after completely locking up on the highway. The engine was toast, so the owner asked us to build him a brand-new one with some of the best upgrades money can buy. We yanked the seized motor out, tore it down to find out what really happened, and then dropped in a fresh beast of a 6.7L to get him back on the road stronger than ever.