Do not believe there is anything that will help with this issue. The customer that received the Reman engine was/is a religious maintenance person. The Truck had no mods and was used for highway towing. The issue to me looks like a design flaw with the rocker arm itself. It just is not heavy enough. Just my 2¢.

 

This issue has been discussed on here a number of times. I don't think anyone has been able to pin point a cause. Seems too me that because they are at the end of the oil stream they probably get the least amount of oil. In stock form the 6.4L is subject to a good bit of oil dilution. That may not be the cause of rocker failure but it sure can't be doing much to prevent failure. A good thread would be to see how many 6.4s that were deleted early had failed rockers.

 

what is DPF?

 

Diesel Particulate Filter.