Everything Wrong with the 6.7L Cummins

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I eliminated every one of these problems, and it is a fucking beast now. Thank God I live in Florida.

My favorite thing about my 6.7 Cummins is the in line six configuration, it's so much easier to work on unlike the V8 configuration.

As a Cummins guy I can honestly say that they haven't ever gave the public a trouble free engine. 12-24 valves had the killer dowel pin. The 24 valves had the 53 block and then the VP44 that Dodge sent out with a junk lift pump. Then we move to the 6.7 that at first only had one fuel filter and lots of folks had stuck injectors kill their engines. But wait there is more! They moved the grid heater to the intake plenum and over time the high amperage can burn a bolt off in the intake and it can be ingested into the engine. Head gaskts are another problem. What has happened is the engineers and bean counters have tried to make the engine cheaper. It's a shame really. Do you think that Cummins would supply a Ram spec 6.7 to run a stand by generator like the 5.9 would? I doubt it. Do I think Cummins is still superior? Yes. But these little things that can destroy an engine is ridiculous.

id say almost all full size diesel engines would be pretty reliable if it werent for the epa

Great video. Had a 01 2500 5.9 24v loved it. Installed a few upgrades, loved towing with it. Only issue was multiple lift pump changes. Never upgraded to Fass. Eventually bought 09 6.7 3500 been a great truck 178k miles. Tows our 3horse Lakota LQ without breaking a sweat. Cummins all the way.

Love Cummins and duramax got myself a 6.7 Cummins for towing but my personal daily is a lbz duramax both of those engines are monsters and super reliable

5.9 will always be my favorite over the 6.7! Both are excellent in the world of diesels

Just bought my first cummins and this video was very informative. Please do one on the transmission.

Man it can be real hard to find issues when the issue is only ones in a while. It's so expensive to do anything. I have been working on one and it's getting the best of me for sure. I have other customers car also and this came in on hook so it's getting overwhelming. But the video was very helpful and I'm glad I found it. Thanks for putting that video together for us.

25yr ASE. chevy guy. Business owner. I drive a 6.7 Cummins. No issues.

Best thing I did to my 2017 ram 6.7 is delete every emission system and install a banks intake elbow (also the grid intake heater removed so the bolt can’t fall into the engine), tuned it for reliability as well as the 68rfe. Hands down has been very reliable and great mpg

“It also helps to drive the truck hard” 68RFE-😳

Very informative. First time seeing one of your videos. I have 2016 ram 2500 Cummins. Thanks for making the video

I love cummins engines, I drive a 2005 Dodge 2500 diesel and it is amazing. I work on 6.7's on Freightliner M2's and Yarddogs. The biggest problems I find are usually Egr Valve/Cooler related and dpf issues a lot on Yard trucks. VGT actuators, and scr's are also problematic. I have seen a couple engines need replaced or major work out of thousands that have gone through the shop. 6.7 engines are great, I believe them to be better than the Chevy or ford equivalent as the Cummins engine is used in a lot of applications. I still prefer a 5.9 common rail over anything though. Just my opinion.

There's another problem I didn't hear mentioned hear; Over time, a bolt in the 2007-current stock RAM 6.7L Cummins grid heater deteriorates, falls into the intake runner, and makes its way to #6 cylinder. When this happens, untold damage happens potentially destroying the engine. Best case scenario, if you're lucky, the bolt can wedge in between the valve and seat. If that's all it is, then the worse possibility is replacing the head if it can't be repaired. Either way, you're talking a lot of money. Thank you for doing this video, it's loaded with great information. Keep that good stuff flowing...

I had a 5.9 and now 6.7. I love them both but the 6.7 is my favorite. I had issues with the injection pump on the 5.9.

I have a '96 12V (original owner) and a 2022 3500 H.O. Ask me which one I like better. The new H.O. Cummins is a beast. ...but I do love the sound of my old 12 valve. Good video.

Great video. Thank you for all the info. I am in the market precisely for a Ram 2500 with the 6.7 Cummins engine. Looking at a 2018 with 68k miles in very good shape.

Great video! As a 6.7 owner I'd love to see a video on the transmission.