Over time, a bolt in the 2007-current stock RAM 6.7L Cummins grid heater deteriorates, falls into the intake runner, and makes its way into cylinder #6. In many cases, it results in total engine failure. Many mechanics either aren't aware of the problem or do not take the engine apart to properly diagnose it. "This is one of the most misdiagnosed Cummins engine issues," says Protech Diesel Center's Brad Hunt. "All too often, mechanics simply replace the engine. Therefore, the problem persists." With the help of Protech in Kamloops, British Columbia, Gale Banks shows the problem close-up and reveals a cost-effective solution.

A few years ago, Brad Hunt at Protech Diesel Center in Kamloops, BC warned of RAM 6.7L grid heater bolt failure. Not only had he repaired several damaged engines, but he believed the problem would become more widespread as the trucks aged. In years since, countless RAM owners from across the U.S. and Canada have reported failures. While hundreds have have caught it in time, others have had to replace pistons, repair cylinders and heads, and some have replaced entire engines.