RAM 2500 6.7L CUMMINS Hydraulic Lifter Failures *Diesel Mechanic Explains* | Not Good?

Описание к видео RAM 2500 6.7L CUMMINS Hydraulic Lifter Failures *Diesel Mechanic Explains* | Not Good?

Ram 2500 6.7L Cummins Diesel Hydraulic lifter failures are become more evident and as a diesel mechanic I take a look and explained what is happening with the lifter issues on the newer 6.7L Cummins Diesels. I also compare the 6.7L Cummins commercial engine to the Cummins engines in the RAM 2500 trucks






well it seems like I may have to eat some of my own words because previously I said the 6.7L Cummins engine was a commercial grade engine and well with the introduction of hydraulic roller lifter in 2019 it seems like that may not the truth.

I think what a little disappointing is that the real commercial grade ISB Cummins engines did not make this switch to hydraulic roller lifters. Instead they stayed with the tried and true flat tappet style lifter that Cummins has been using since the 80’s with the introduction of the 5.9L Cummins 12 valve engine.

The main theory behind this lifter issue at least in the internet is that people are using the wrong weight of oil. Starting in 2019 Cummins switch to 10W30 weight oil from the traditional 15w40 and this could directly damaged the new hydraulic roller lifters.

Another theory is the extended oil life interval. But I doubt that as it really did not change. Lastly I think what is most likely the issue is a bad batch of lifter or the design is just not holding up.

Let me know what you guys thinks

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