I searched a bit, perhaps with the wrong terminology, and didn’t find anything on this site. I often check the TSB reviews but could have missed something. Google results are easy to come by with “killer heater grid bolt” but the information available isn’t great.
For those that aren’t familiar there’s a bolt and a nut that are part of the 6.7 heater grid assembly and apparently the bolt has been known to break, or I’ve also heard it described that the nut will back off. Once free that broken bolt/nut is free to travel into the combustion chamber and wreak havoc. It seems thats it’s often around 100k miles and/or out of warranty. Some have reported a code associated with the grid heater as the bolt loosened, but not everyone was that lucky.
Is there a window of years that we’re affected by this? Is the solution to just replace with higher grade fastener? I’m not looking for an expensive aftermarket solution, as I already have 1 money pit Cummins with all the fun must have “upgrades” but would like to keep my daily bone stock and reliable for as long as possible.
For those that aren’t familiar there’s a bolt and a nut that are part of the 6.7 heater grid assembly and apparently the bolt has been known to break, or I’ve also heard it described that the nut will back off. Once free that broken bolt/nut is free to travel into the combustion chamber and wreak havoc. It seems thats it’s often around 100k miles and/or out of warranty. Some have reported a code associated with the grid heater as the bolt loosened, but not everyone was that lucky.
Is there a window of years that we’re affected by this? Is the solution to just replace with higher grade fastener? I’m not looking for an expensive aftermarket solution, as I already have 1 money pit Cummins with all the fun must have “upgrades” but would like to keep my daily bone stock and reliable for as long as possible.