2025 Cummins Win or Fail? Engine feature leak analyzed by a truck enthusiast.

[@SteveCallsen]

So, u think a 24 Cummins motor would be more reliable than the 25?? Trying to find a 24 right now, but not much left out there with options that I'm looking for, so considering ordering a 25, but I definitely don't need to be foolishly signing myself up for a bunch of unnecessary mechanical issues with down time.

[@greatlakespowerstrokefx4]

Im a bit disappointed in the hydraulic lifter engines. Their failure rate is pretty bad. With this new design you would think they modified the engine to be reliable with hydraulic lifters. If they did that, that huge issue will likely be avoided. Id be confident in being concerned with a 24 if you are planning to keep it outside of powertrain warranty. But im somewhat confident they took the issue seriously and addressed it with this entirely re designed version. I wouldnt really worry about glow plugs on the 25. I see that as an upgrade especially if you arent deleting. The egr really cakes up the grid heater after about 60-80k miles. Now i would always caution against a first model year. Lots of bugs get worked out. But at the same time i couldnt confidently tell you the 24 is a better bet. If it was me, and the cummins was the truck i wanted, id give a 2025 a shot and be open minded to first year problems that need to be warrantied.

[@SteveCallsen]

Thanks for the info!! I appreciate it!! I have a 23 f350 with the 7.3 right now for a work truck, but just all the computer crap, the 10 speed transmission & so & so on are just not working out very well for me, I like the 7.3 motor very well, but because of all the other stuff, it's just not working out, I'm to the point of not liking the truck for what I need it for. Test drove a ram the other day with the Cummins & I felt like I was in a work truck, not a computer on wheels!!!! I swore I would never get another diesel cause of all the emission stuff, but I'm seriously thinking about trying one again. Once again, thanks for your input!!!​@@greatlakespowerstrokefx4

[@Youngmechanical]

I currently have a 2021 5th Gen Aisin truck with Carli and Fox. Couldn't be happier. I got out of multiple Ford trucks. CP4 pumps in the Ford kept me from going back to Ford. Both trucks definitely capable for any use. Cummins i feel is a workhorse towing and Ford is a hotrod.

[@greatlakespowerstrokefx4]

@@Youngmechanical thats really what it comes down to previously. Weighing the high pressure pump to dealing with the 68 or aisin and the lack of power compared to the 6.7. But now ram going to supoosedly a cp4 based pump, now we will be weighing other things besides the transmissions.

[@tedlulis973]

Dodge is going with the ZF 8 speed transmission​@@greatlakespowerstrokefx4

[@kfiedl3600]

CP4 is a $10K time bomb.

[@greatlakespowerstrokefx4]

@ to some not to others. I have many friends with high miles on stock 6.7 and lml’s. One over 420k.

[@timkopp2204]

​@@kfiedl360014k in my BIL's GMC.

[@Lord-Of-Light]

As one of the engineers that helped designed this generation of this engine, it’s fun to see what people think of it and see people’s theories. I do the same thing with Apple products, so it’s fun to be on the other side of a release.

[@greatlakespowerstrokefx4]

@@Lord-Of-Light i am so thankful for the 8speed. And the side draft sounds great. Can you speak to the potential cp4 pump or no potential cp4 pump? Can you elaborate on the choice to go to glow plugs? Am i correct its for cold start emissions?

[@Lord-Of-Light]

@ I’m glad that you have had a good experience with the transmission, however that is a system that is specified by Stellantis not Cummins, so we have no control of what they use for that. As to the fuel pump, I don’t know much about it other then it being a belt driven Bosh system that was updated for the 2025 model year, but I don’t know what the architecture that they are using is. Yes, glow plugs provided better control of the ignition point providing more reliable combustion behavior. The computer constantly makes adjustments to manage the fuel burn dynamics to balance efficiency, power and cleanliness. So the more precisely you can control the variables like ignition point, the better the system can balance.

[@Lord-Of-Light]

@@BlackpowderBBQ I wasn’t on the team that made the change to glow plugs so I can’t speak exactly to why the change was made. But I believe it was made to give better control over the cold start combustion behavior for emission compliance reasons. Our compliance requirements from the government keep going up every few years, which drives a lot of the change you see in the engines. The B engine platform is actually a fairly simple design in concept, but between customer expectations for increasing performance, constant need for maintaining reliability, and the ever increasing emissions requirements, the engine keeps getting more and more complicated to try and meet all the different requirements placed upon it. Cummins spends billions of dollars trying to ensure that the engine is as reliable as possible, but any complicated system is going to have unforeseen problems.

[@sebollinmarco7458]

@@BlackpowderBBQisn’t the grid heater the one that makes a major failure in the engine ?

[@greatlakespowerstrokefx4]

@@BlackpowderBBQ keep in mind, ultimate reliability isnt the only thing driving decisions made by engineers. Budgeting and emissions regulations make decisions for them. In my experience most poor decisions stem from cost saving initiatives and stricter emissions regulation.

[@AllAmericanAutomotive]

I didnt know you were a 3rd gen man back in the day. Explains alot. Lol just kidding man. Trucks looks good! Like your perspective

[@greatlakespowerstrokefx4]

@@AllAmericanAutomotive my poor beast looked so nice 11 years ago. Time has not been good to her and i made due with what i could. That black paint is covering up the rust repairs lol. Road hard and put away wet. Its been a good truck

[@AllAmericanAutomotive]

@@greatlakespowerstrokefx4 do you still have it?

[@CoyoteWoods-fm3gj]

Its just so stupid buying and driving a expensive computer, not everybody wants this kind of junk. Just a hd truck thats realiable that you can haul wood, dirt and garbage to the dump.

[@greatlakespowerstrokefx4]

@@CoyoteWoods-fm3gj totally agree. The problem is these rolling computers are alot better than the trucks of yesteryear. I have a 12v cummins, 1st gen. No computers, the engines will run forever but the truck itself doesnt compare