EDIT December 2023: Cummins roller itself is the problem. Only real solution is a flat tappet conversion.
See new thread here! https://www.cumminsforum.com/threads/flat-tappet-lifters-for-2019.2588287/
Alternatively, the expensive and custom Jesel rollers sold by Wagler can be considered a solution, but there currently is little real world knowledge on robustness of this setup. Choose carefully.
Been doing some digging and someone (Wagler) is finally offering a solid roller lifter conversion for 2019+ trucks.
It uses the factory ISB adjustable rockers, but just replaces the internals of the hydraulic lifter with a solid spacer. Also uses custom pushrods as 2019 uses different ball on lifter and different length.
Seems like a permanent solution for when the hydraulic lifters go bad.
See new thread here! https://www.cumminsforum.com/threads/flat-tappet-lifters-for-2019.2588287/
Alternatively, the expensive and custom Jesel rollers sold by Wagler can be considered a solution, but there currently is little real world knowledge on robustness of this setup. Choose carefully.
It uses the factory ISB adjustable rockers, but just replaces the internals of the hydraulic lifter with a solid spacer. Also uses custom pushrods as 2019 uses different ball on lifter and different length.
Seems like a permanent solution for when the hydraulic lifters go bad.