These 2 Ram 5.9-Litre Diesel Problems Kill Engines

Ram’s 5.9-liter Cummins diesel engine has proven to be a solid power source for medium-duty 2500 and 3500 trucks. The first 12-valve 5.9 debuted in 1989 from the Ram and Cummins collaboration. With fixed geometry turbocharger, it was a strong but simple design. Then, in mid-1998, the new 5.9-litre 24-valve design was introduced, which was to last until 2002. Both developed two problems that could be catastrophic in many cases and required an entirely new replacement engine.

These two songs even have names, ’53 block’ and ‘killer dowel pen’. Name any of these terms and 5.9 12v and 24v enthusiasts will know exactly what you are talking about. So what are these two 5.9 problems, when can they happen and what can be done to fix them?

Leave a Comment