6.7 Cummins Diesel Engine Problems The 6.7 Cummins diesel engine is the latest of the B series engines. It's a straight-six, 24 valve turbodiesel released for Dodge Ram trucks in 2007. The B6.7 Cummins still lives on in Ram 2500 and 3500+ trucks to this day. Though, it's been through a few updates over the years. As of 2021, the 6.7 Cummins offers an impressive 400hp and … [Read more...] about The 5 Most Common ISB 6.7 Cummins Engine Problems