The MOST Common Issues with Cummins X15

Is this guy drunk or what? I think he is working for Detroit engine company! Don’t believe to this misleading man. Only known problem that X15 has is Water pump and coolent system leaks starting from the radiator and all the way to the HVAC heater in your sleeper. Once a year you have to check inch by inch the entire cooling system. If you don’t know the cooling system in T680 get yourself a printout of the entire cooling system and inspect every single hose, fitting and clamp that means if the coolant is passing through CHECK FOR THE LEAKS! Thank you!

Detroits are some of the worst pulling when full they run best when empty it’s gonna be a Cummins or a pre emission Mack for me don’t have experience with cat yet

The only issues I've had with the X15's that I've been around and driven is the damn def systems. Stupid emissions control system.

blablabla ;)

I couldn't fall asleep tonight untill got out and checked my fuel pump. Its still there

I haven't had any of those issues at all on my 2020 X15

99% of Cummins engines that I've seen being rebuilt never made it past 750,000 miles.
Someone should take a survey on this.🤔

I feel it's poor maintenance and also I wouldn't really get this from a driver well you can but it's better to get this information from a mechanic who actually works on

Clown!

yeah I idle my kw all night. oh well man's gotta stay warm

My family have 20 kenworth trucks in Australia, we have never rebuilt a Cummins between 800,000 and 1.2 million kilometres they blow us and get exchanged, but 2006 T650 we sold with a C15 cat, we should have never sold it, the new owner loves it, and we pull 3 trailer roadtrains. Hauling 100,000 litres on diesel 26,400 US galleons, on rough dirt roads. Hence why we only use kenworths.

Only a stupid person would stand outside in subzero weather talking about something he does not even operate. "I run a Detroit but I'm going to tell you about Cummins engines"". Go someplace warm and just be quiet

Ps all poultion controls are off the prostar

I have a 2007 prostar with a cummings. Has a million three km on it. Was working fine two weeks ago. It quit no codes. Towed to shop. Did a turbo in a shop and still not fixed, found a bad fuel sensor. Claimed it was fixed went to pick up 1st load shut down , start and shut down again. Put computer on and had problems communicating with the ecm. Got a used ecm and program by cummings. Ecm ok. Went a couple of kms and quit again. Looking at wirering.
No real answers from shop any thoughts?????

About to change out a dd15 with either a 60 series, N14, or ISX15. 🤷🏾‍♂️

FRONT AND REAR MAIN OIL SEALS GO OUT AT APROX 300K

That is isx15 not x15 ,what are you talking about???

So you go to Cummins asked them.
what is common problems with your engine?
And they go ahead tell you all the problems.

He doesn’t have a Cummins but he’s an expert on those engines.

Detroit engines biggest problem is that it’s put in a freightliner…

Do I need to calibrate the using a computer?

Overall Detroit is the best!!! they cost less to maintain and rebuild and offer the same life span as other brands. DETROIT IS THE TOYOTA OF THE TRUCK WORLD. 60 series months and months with out turning it off not even to refuel.

Asking a Detroit guy about cummins problem 😂

SO,,, YOU mean that cummins is a BAD engine in winter cold region,, YOU state that cummins is not reliable to run during extreme cold winter,,, ????

Good old 12v Cummins the best

My 2014 pete with the isx15 it never suffered any of those problems, it did suffer from the cam hardening failing that was a problem from 2013-2017 and the biggest thing that killed my truck was being deleted! It had a bad tune, pulling 140,000lbs day in and day out through the canadian rockies did some serious damage. Took 14 months for it to drop valves seats and destroy almost everything.
I'd very much so recommend not deleting an emissions truck, instead just don't idle it.
I'd take another cummins in a heart beat no question about it, had more power then any other truck I'd driven which includes all the old school favorites 3406, 60 series, dd15, just not the n14 as I'd never had a truck with one yet.
My paccar mx13 is dead set reliable, they really are bullet proof engines between 2014-2017 even with questionable maintenance. Just no power and no better fuel economy than I got out of my isx15.

No power going up hills that's depends on what rear eands you got the lower the ratio the more its going to die

They do own any single Cummins and they are making video for cummins what waste of time anyways goodluck

Looks like you telling all this stuff about the wrong engine, worked in KW as a tech for a long time and none of these applied sounds like a Detroit motor issues you are recalling. Sounds like you are hating on the cummins and got paid by Detroit engine 😅

Flat cam lobes

I had 2015 freightliner isx15 1millon 49k miles never had a single problem with the engine except a oil leak . Sold it last week its still got power. Never replaced a fuel pump or the turbo either . Bought it at 600k miles

I have a Volvo with a Cummins and my dpf module catylist blew up and now my truck has been in the shop since may because they don’t have any and they keep telling me they don’t know what to tell me and I’m about to lose my truck to the bank … Cummins suck and will leave you out to dry

Interesting that I have a 2019 Cummins x15, currently with 475,000 miles and have yet to have an engine issue, not even a dpf issue. I did need to have the def manifold replaced in 2021, but I wouldn’t consider that an engine issue.

12v, 120V and Coolant Heated DAVCO Fuel Filter is the only way to go on all trucks

I don't know maybe it's just me I don't think this guy likes Cummins engines😂

detroit sucks, cummins, or GTFO

Very informative thanks

I've seen that fuel issue in alot of ism and isb as well

On my 2021 had issues with filter , started using fleetguard filters . Problem solve .

Loud air compressor.

Why is he doing a video on Cummins issues and they don’t run Cummins? I’m a Cummins tech making other things. Most of what he’s claimed is hear say and not really seen by most shops.
Run whatever engine you want, they ALL have their issues. Also keep in mind ISX15 and X15 are two different motors. Also the ISX15 had dual or single cams. There’s a lot of misinformation being presented here.

I'm Freightliner, Cummins, international certified! @ 500k I noticed Cummins becomes a leak monsters. Leaking everywhere, from oil pan, front crank housing, rear flywheel housing, fuel pump, rear main seal, etc. I understand every company has their flaws! I love Cummins, Strong n reliable but they leak alot!

Max Mileage fuel borne catalyst will solve most of the shortcomings in the design and function of the after treatment system. (Actual user, Alaska winter driver, uncompensated endorsement) 5 years continual use...no detrimental side-effects

Starting the video with a “look how cool I am” vape hit is the cringiest thing I’ve ever seen. Didn’t even bother watching the rest of the video and gave it a thumbs down.

Thanks you for your advice gracias

Another main issue I’ve seen on these is DPF Differential Outlet Pressure Sensors notoriously go bad.

Our 2020 X15 gels fuel at 25f but generally the fuel supplier's winter mix or bio-fuel percentages. We normally carry 2 sets of filters for everything.

Thank you for the info .

hello well as for the x15 it is a complete redesign from the isx not one part from these engines will interchange get the facts correct

The fuel pump issues are very real, it is best to rebuild them at roughly 400,000 miles. This is for the CM-2250, CM-2350 and new X-15. Cummins does not build the fuel pumps, I believe Borg Warner does. This is a known issue that no one has been able to solve. Ceramic plungers or steel plungers, they all eventually fail, so rebuild them. And if you ever get a fuel warning light, hit the shoulder and shut her down. The damage can be extensive and expensive, even with the oil circuit being taken out of the newer models. You will still have metal shrapnel in the motor, and more than likely loose all 6 injectors.

The fuel gelling? Not an issue that I have ever heard of, may have been a location issue, especially in the temps you were experiencing at the time. Most drivers and O/O do not even know what PowerService is, or any of the other flavors for that matter. 

The emissions, the Cummins is very easy to maintain if you have a copy of Insite and an Inline 6 reader, both are readily available on eBay for the entire kit, around $250 delivered. Regular EGR Tuneups will keep you out of trouble. Best to remove and clean the EGR Valve and Cooler every few years too. Then the service intervals, 10,000 to 18,000 miles, depending upon usage and conditions. Play around with extended oil changes, and you will be in the poor house when all of that soot catches up to you. In frames start at $28,000. Best to purchase one of the Amsoil Universal remote oil filter kits and run that along with the oil filter on the motor, help keep those soot levels low. Amsoil filters are not required, just find a filter that fits.

Then the two main sensors that everyone neglects, the sensors that always has Cummins turbos on back order, the Intake Manifold Pressure Sensor and the Exhaust Back Pressure Sensor. Both are easy to replace in a parking lot with a 10mm socket for the intake sensor, and a 1 1/8 inch socket for the back pressure sensor. Many turbos, at +/- $8000 a pop, are sold to unsuspecting truck owners, quite the racket these shops have going... And when you come back, they nail you for another $4000 +/- when they replace the EGR Cooler... And when you come back again, they tell you you need an in frame... That is how it works folks, when all you needed were two sensors, roughly $300 out of pocket and a few minutes of your time in the parking lot or truck stop to install them.

Those blown head gaskets? Drive the truck the way it was engineered to be driven. When under a load, the rpms need to be kept at 1500 and above. Due to the design of the motor, when you lug the motor, say in that 1200 rpm range, under a load, the rods and pistons simply beat the cylinders out of their perch on the tiny ledge they sit upon. Keep the rpms up, stay out of the shop. In frames start at $28,000.

The other incentive to own a Cummins, is the fact that they give you all of the manuals for your particular motor via the Engine Serial Number on their website, Cummins QuickServe, all for FREE!. All of the instructions to properly diagnose, repair and even rebuild the motor in your driveway. All of the parts catalogs, specific to your motor, along with torque specs, electrical schematics, sensors along with the needed part numbers for any speciality tools you will need to accomplish the task at hand. No other manufacturer does that.

Cummins fan boy here, for good reason. Mine just rolled 1.1 million miles.