cummins isx cam failures

Cummins are also the folks that are going to be selling you the parts to rebuild it, I'm just sayin'...

 

Manufacturers actually have hr meter service intervals as well and base it on how hard the rig is working, idling vs pulling heavy, etc.

 

Valve sets, Cat recomends the set be done at the first oil change, I agree and then every 250,000 after that, and change the inner jake springs.
The cams flaking is caused by the high injection pressures and the cam inner metallurgical composition being too soft and the hardening process being too thin.
There is no oil preasure directed to the cam followers they get the oil from oil passing the outside of the roller, and splash.
Extended oil changes affect, the rotating parts, the bearings especially, and the rings, when the oil is dirty it is impregnated with a lot of 30 micron particles, it acts like a lapping compound. I worked on engines and saw the same trucks come in and got to know which owners changed the oil at what intervals. The ones that extended to intervals got a lot lower longevity out of there engine than the ones that change it early. I was taught that an oil change is the cheapest overhaul you will not need. Years of experience proved that. Using a spinner filter, also extends longevity. We were involved in a synthetic oil test run on 6 trucks monitored and doing what they said needed doing, it was a failure, the engines were very dirty inside and the bearings compared to units using dyno oil were a way worse, there was absolutly no change in fuel milage. These were trucks that went from Port Kells BC to Westbank BC hauling 144,000 lbs twice a day 22 hours, two drivers per truck, over two mountains.
Just a thought!