Cummings long-block purchase.

Interesting. I was under the impression that they solved that issue with the 24v and never looked back
Nope. Cause honestly, they didn’t even know it was an issue by the time the 24V was in production. The KDP typically doesn’t show up much until the mileage got higher, the 24 Valve was actually designed 5 years prior to its release in 1998. And due to supply chain issues with the VP pumps, pushed back until mid 1998. Most of your 12 valves which used a similar front timing cover as the 24 valves hadn’t hit that mileage yet. It wasn’t until the warranty numbers started creeping up that Cummins became aware of it.