Cummins Engine Reliability - Are They On the Downhill Slide?

Cummins Engine Reliability - Are They on the Downhill Slide? In this video, we talk about the issues Cummins is having with reliability. Not consistent results coming out from Cummins!
0:18 Cummins Efficiency Series
3:30 Lots of Used Trucks with Cummins Engines (Reliability Issues)
6:00 N14 Cummins Talk
6:50 X Series Cummins
9:08 Which is better X15 or Detroit DD15?
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[@SmartTrucking]

Hey there Big Strappers. Hope to hear YOUR experiences with Cummins engines. Was it good or was it the engine from hell? State the engine model and what went right. Or wrong. 😉

[@thomaskirk9341]

That I-phone thing is scary, no more big bro, thank you!! The emissions are basically screwing up all the engines. The N14's were a great motor, and the company tried Cat, they were mostly good but some issues. Since then we've been using Cummins, first the ISX, which we did have some issues with, mostly cams and emissions. When we went to the X15's fingers crossed, no issues. I run an X15 Performance Series 605/2050 with an 18 speed in a T880, it's had some tuning done and it's been a monster with no issues to this point, my mileage is about .4 better than a comparable Western Star with the DD16 600/2050, 18 speed and same gearing, stock vs stock the Cummins pulled better and got slightly better mileage, and the Detroit has also been issue free, so time will tell. Not a huge fan of either the Paccar or Volvo engines, but I tried a new Mack Anthem with the MP8 505/1850 and 18 speed, liked it but they need to do some bigger HP for our use, nice truck though. Problem is, all the manufacturers are REALLY pushing Automatics now, maybe I'm too old school but I really prefer to do my own shifting, and I have yet to try an automatic that works as well with a Jake as I'd like it to.

[@coolasbeans]

The x15 cummins has statistically less problems then the n14. Have 1 with 700k haven't done a thing to it.

[@coolasbeans]

I'd also like to mention that's hauling canadian weights.

[@mikedanaher3413]

Emissions killed all the truck engines. They are all junk.

[@pqhkr2002]

I think the "Truck", not only diesels on big trucks, but also gaslines on light trucks.

[@technicalitems731]

But capitalism! Capitalism will force the truck manufacturers to figure it out. But they’ll figure it out at the cost of the working man/customer. I guess the corporations win again!!!

[@maxxod1]

A few years ago. Cummins were having cylinder sleeves drop out under a 100 miles. The funniest part was on one end it was stamped “Cummins” and the other end was stamped “Made in China”.

[@SmartTrucking]

Right there, that should scare you!

[@MrFriday83]

Funny story, Detroit dd15 can do internet connections. I was cruising at 70 one minute and without warning it wouldn't go over 65, so I pressed the peddle was topping out at 62. That night I sent it to the shop... They said it was ok, for the next 2 weeks I kept sending it into the shop as often as I could until finally the dealer said your company dialed your truck down.

[@SmartTrucking]

Those bastards! The least they could have done was told you!

[@rd5991]

I got a w900L heavy spec with the 605hp/2050tq X15 performance series. No problems with it so far, 500k miles. Hear lots of great things about this motor. A real proper work horse.

[@SmartTrucking]

Great! Please keep us posted!

[@LifeofJoban]

I only run 12.7 Detroit’s pre EGR and have done for the last 5 years, they are the most reliable and durable engines ever made. Cost effective for owner operators and fleet owners also. Emissions equipment failing can take down an owner operator. No one has 10/15k just sitting around for repairs.

[@gregoryolson1782]

Ive got a PRE emissions ISX, I did rebuild on it. Everything But the Two Cams, been a SOLID runner. Ive got to admit the brand new air compresser makes a Little more Noise than Ide like. But she Pulls really well. My Boss has a FLEET of Petes with 6NZ CATS, NOTHING RUNS LIKE A CAT.

[@bradleyselk9642]

I have a red top n14 in my pete and It will remain the finest engine ever built in my opinion. Great fuel economy, plenty of power and great sound witb dual 7 inch straight pipes. These new engines are a waste of money. They may be nice when new but when the things need mataince it'd probably be cheaper to just light your wallet on fire.

[@whoveniledelinquent]

Hi from down under, I have an Aussie version 1985 Kenworth K100 cab over with the Cummins 400 big cam turbo, no issues. Can't tell you how many times I forgot to hit the switch to low at a stop and she still pulls away in 6th. Cummins rock!

[@kennethd9344]

Just want to thank you for doing this video love them and a lot of old time trucking thanks

[@SmartTrucking]

Thanks Kenneth, appreciate it!

[@Soberglitch]

I run a 2017 ISX 525. The engine itself has been solid. The only issues I’ve had are the sensors and regen cycle with the dpf and the truck itself has been plagued with electrical issues. The electrical issues are something I’ve seen with all of the new Peterbilt/Kenworth trucks I’ve used.

[@mitsnevets]

my 444 in my old 89 W900 was the last truly great Cummins engine in my opinion , my current unit is a 97 T600 with a 12.7 Series 60 , just had my 2nd inframe done this fall and its got over 2 million miles total on it

[@joepoppenhagen5694]

Had a big cam in my 78 Frtl. Cab over. 400 come apart. Upgraded to a big cam 4. Put over 2 million miles on her. Sold it to a farmer. he put a wet kit on it. Hauling sugar beets and grain to this day.

[@SmartTrucking]

Those were great engines. Some of Cummins best.

[@I_like_turtles_67]

Go with the x15 performance motors. The 565/2050 is the way to go. The least amount of issues I've seen are the higher HP motors. I do drive a 500/1850 truck. 500k miles. Runs pretty good for the E series trucks.

[@dk3062]

Every engine is reliable when going downhill... Just saying.

[@DocDewey]

Exactly. It won't stop you. No need to pull over because you broke down

[@allanbacon2977]

I miss the 70’s.

[@SmartTrucking]

Me too!

[@sukhas8625]

Drove a n14 and it was absolute amazing engine. I had 2 isx cm870 First ones block literally blew up. There was a whole in it My second truck I spent thousands stopping the oil leak. I’ve just deleted the egr and going to see how it runs now. I’ve also driven a w9 with the new X series for a few months and it’s probably my favourite “newer” motor.

[@mrj-charles6383]

My brother always bought trucks with Cummins motors and was happy with the older ones. . I mainly drive Internationals and I just drove one with the X15 motor. The dealer said that was the replacement for the awful Maxforce motors. Really like it cruising at 75 and still maintaining close to 9 mpg. Hopefully, it is reliable since I see a lot of newer trucks needing major service before 500k now.

[@MrNastytrucker44]

I have two trucks with isx. One is a 2012 cascadia 985k miles runs great, the other is a 2013 kw t660 had to be inframed at 550k. My other three trucks have N14, dd16, and 5EK. No issues to report on those.

[@derrickodyes1934]

i had a stc444big cam 4. they had initial teething peoblems but had and ran it 10 years with no issues. Worked at a Pete dealer that sold mostly Cat and those certainly had issues too starting with the twin turbo bridge engines

[@isaacrecord6162]

There’s been some nightmare stories with the ISX but where I work we’ve had pretty good luck with the ISX12s and 15s

[@flatbedtrucker5473]

Same here, I love cummins

[@whotf888]

And they say that the newer X15s are even less troublesome (in the Productivity series)

[@mrnobody8540]

@@flatbedtrucker5473l

[@timwinker5522]

Lol .... I remember "The Shinny 290" being a big motor!😆 I had a 76 White Freightliner Cabover with a 350 Cummins it was a good motor!

[@SmartTrucking]

Yes they were!

[@SuperHigear]

I drove a 1982 White road commode powered by a Cummins 400 big cam. Never had any big problems with that engine and loved the power!

[@SmartTrucking]

The old big cams were great engines.

[@CumminsX15]

Great video

[@derrickodyes1934]

i really doubt the dispatchers of 100's of cummins app controlled trucks has time or will to sit there and controll and 1 truck from minute to minute. Limits and parameters will be set and thats it

[@dchawk81]

Yeah this is all horse crap. They're not gonna give dispatchers that kind of power. If they do, run.

[@anthonytrujillo3494]

I’ve been fortunate to drive a variety of engines including the N14 being my first and currently and ISX15 500hp ..To stick to the Cummins issue the N14 was a great engine but leaked oil like crazy..that was probably my only issue..the current ISX I operate again a great engine so far with just a couple small issues with of course sensors ..

[@548raptor]

Love your channel. Loads of information 😀 You should be chairman of USDOT. But then we are not going to hear on these amazing topics. Stay blessed

[@SmartTrucking]

Thanks for watching!

[@robertkiell]

well i love cummins engine.. they just keep on working... mine was isx15 600 hp truck engine and have 300k miles and have no signs of dying unfurtullay i sold that truck another good engine is john deere which is dam good motor

[@truckerrespect7797]

In 2018 my boss decided to reward me for my service with a new K-Whopper. We picked out a 2018 W900L Xtra cab. The choice of power plants was either the Pacar or the Cummins. I had heard horror stories about both and ultimately went with the a 2017 ISX-15 paired with an 18 speed. At this time, with 2 1/2 years of service and 200,000 miles, I’ve had 0 issues aside from a fuel/water problem due to where I was getting my fuel. I’ve had two other KW’s with the ISX, and although sometimes underpowered, I’m very happy with my current ride. Besides, it is my profile pic

[@camcarr1835]

Hinkle trucking out of Circleville, WV in the background. They have a lot of nice trucks I live close by them.

[@StefanBacon]

I enjoyed the red motor I was running for a couple months. I miss that manual transmission too :(

[@SmartTrucking]

Yup, know I'd miss the manual.

[@5FaLlEn5]

2015 up ISXs & X's hardly have major issues that wasn't maintenance based and these new darn extended service intervals won't work for everyone as most would believe. But the EPA 07 & 10 engines in all makes had the lowest relibility when you really start digging for information.

[@BadBaltGuy]

What i believe now is the engine manufacturers realize that the majority of the market considers new trucks " disposable " which makes sense. There is zero sense in trying to stuff a new engine in a new truck after a few years. They just dispose of them.

[@SmartTrucking]

What you're saying makes sense.

[@yamahaking6137]

I had 2015 Cummins 550/1850 in my 2017 389 I put almost 300,000 on it never had any single problem.. just hated that junk hanging on the side DPF.. I always ran it on 1500 rpm no matter what’s my speed..

[@andrewjoyce3634]

Drove for challenger running team with my wife, we had 2 kw t680s with the X15 450hp we put about 1.2k between the 2 of them and never had a breakdown

[@SmartTrucking]

Good to hear!

[@dbeck9587]

What cummings would you recommend for a glider . Looking for good hp but good mpg.

[@MrRyanrk12]

Just got my new 389 that I ordered back in June and I decided to put a x15 production series 500 horse in it. My first new truck in 22 years of trucking and I was very skeptical of buying anything with def. My 2002 379 with a 6nz cat I had it for 15 years and she was an awesome truck. I think comparing the new motors to the old stuff is like apples and oranges I can tell you one thing this new truck is getting 7.2 miles per gallon us so far which is about 1.7 mi per gallon better than my old Pete running tanker and that's at 93% loaded miles the truck is only has 23,000 miles on it so hopefully she's a good one. And the reason I went with Cummins is all the service managers I talked to in Ontario at Peterbilt London Windsor and Kitchener told me that the x15 is way more reliable of a motor especially on the electronic side compared to the PACCAR, and the dealerships also said you're at the mercy of Paccar dealers if you need it fixed somewhere at least with the Cummins you can go in anywhere.

[@kontrolledkhaos4853]

I think so third break down this week last night had radiator hose blew in Denver just out of no where

[@SmartTrucking]

Geezuz! Frustrating huh?

[@kbhay1915]

Cat 3406, Detroit S 60 Cummins N14 they were good engines

[@coolasbeans]

The x15 cummins statistically has less problems then the N14

[@grilledmortal4096]

I have this irresistible urge to comment

[@angelsepulveda8393]

You just did...

[@SmartTrucking]

I'm disappointed that you haven't!

[@MikeBrown-ii3pt]

The first tractor I ever bought has a Cummins M11 Celect Plus. I still own that tractor. My "daily driver" has an ISX 15. It was overhauled at about 990k miles even though it still ran strong. It has over 400k on the overhaul with no issues. I'm glad to hear that the X 15 is even better than the ISX since I bought 2 brand new tractors with the X engine this year and plan on buying 2 more next year. You'd take a DD15 over a Cummins? Seriously? You might as well trade in your Pete for a new Valvo lol! When I bought a new tractor and put a driver in my old one in 2001, I bought the same truck (Freightliner FLD12064) but instead of a Cummins, I spec'd it with a 14L Detroit. The Detroit was rated at 500hp while the M11 made 370hp. The trans and rears, along with EVERYTHING else was the same between the two tractors. While the Detroit would run great on flat ground, that little Cummins would pull the Detroit on any hill.

[@OpeoAslam]

I’d choose an X15 over an MX13. The Paccar motor in my T680 has been disappointing. I miss my old Volvo with the D16 it had every time I accelerate or climb a decent hill.

[@kontrolledkhaos4853]

Was this video a live feed I didn’t get the notification on the video

[@SmartTrucking]

I believe it's a segment from a livestream.

[@Trump985]

I have a buddy with a x15 in his truck, he’s got under 400k no major problems but the thing blows oil everywhere the load is covered in oil he has to stop a couple miles before the delivery to clean all the oil off the load a 300-400,000 mile engine shouldn’t have this much blowby about 1 gallon and hour of oil consumption. Don’t see 1gph on a Detroit 71 series until twice this mileage and they are well known for wetstacking

[@vadimprozorov2569]

I have now a cat C7 which has 1050033 km no repairs, no def no problems. Loving it absolutely. No Cummins anymore in my life, period.

[@SmartTrucking]

Good to hear!

[@brianaustin6184]

Have an 15L isx in my T680 698,000 miles,,work for a private fleet so money really isn’t an issue,they take good care of the trucks. Engine wise feels like a brand new truck,emissions is the issue we’ve had a scr issue twice,dealer did force regen and was okay. Something else with the nozzle angle for spraying def,the trucks frame in the rear is constantly white not sure why,can’t seem to figure that one out but run normal at the moment. All of our fleets trucks have had the issues we’ve had between 500,000-600,000. My truck seems to be the fleet lemon,but even then with the scr code white smoke,ect it’s never let us sit and has always ran as if nothing was wrong. I personally wouldn’t own one.I won’t pay that bill lol It costs the frame in white minimally currently but they use to fix it and later that week it’s be really coated and drinking def. we run our trucks between 1.2-1.5 million before rebuilds.typically put 2-3 million on a truck. Now they stated this year no more rebuilds,not sure why we have our own shops master techs and equipment to do so. This year with the slow down,and really not working much compared to previous years we will still have put 300,000 on it. Cummins issue IMO is emissions,know a few people that have moved over to x15 and say they are better

[@604h22a]

Still better than the international engines our company spec’d

[@stephenvangelder3893]

As I am a mechanic, I have seen the ISX go 1.6M with out a rebuild down to 500K, is it maintenance or version, not sure. N14 is much better.

[@matthewhansen5008]

I am most definitely in agreement that the ISX15 engines have had way too many problems. Dropped liners Chewed up cam shafts and rockers Front and rear structure oil leaks. Oil consumption due to polished cylinder liners. And the total engine killing high pressure fuel pumps. They do say the X15 engines are supposed to be better. Time will tell.

[@Ulfstigandr]

Droppin liners is common in the isx. My dad switched to a paccar for is last truck just cause he was tired of the shop time with the isx engines

[@waynenorbreyjr9371]

My boss has a couple of 2016 Kenworth with the Paccar MX 13 and there right at 500k and as far as the engines good they've been really reliable.

[@joshweinmann1061]

Mechanics I’ve talked to believe the cam issue is due to extended oil change intervals. Figure the cams get deposits on them. I believe 20,000 miles between oil changes is way to much especially on a motor that eats carbon all day.

[@Tyler-xe1es]

I agree.

[@Mtts28]

Agreed. Our shop even runs our Detroits 50k between oil changes. It’s insane.

[@SmartTrucking]

I've been hearing that too and I believe they're right.

[@lungelinecowboy]

I've heard the same. My mechanic I use said the guys that follow the extended intervals in the manual seem to be having the most engine problems and fuel system failures. I change my oil at 20,000 km with fuel filters. Book says 48000 km for both if under 6 mpg pulling heavy. No thanks. Oil appears to be same as the old engines when I look at the colour change and it drops on the dipstick right around 18000 km. Just like the old motors I ran did. At $60,000 just for a drop in motor now a days why would anyone neglect cheap oil and filters.

[@brianaustin6184]

@@Mtts28 ours runs 60k with 30k filter changes. They torn a few down with over a million on them,and do oil analysis and comes back good, I wouldn’t do that myself

[@scottgeertsen3021]

Big cam 4 converted to n14 84 kw still on the road

[@johnsalvatore6887]

All I run is Cummins I build them myself was a factory trained tech for 14 years and grew up In a family of owner operators the first DOHC IFSM ISX had some issues it was mainly with cam gears and lash between till they came out with a spring loaded adjustable gear where you had to set the lash between correctly then emissions struck and it became almost all my road calls were after treatment all the soot being forced back into the engine shortens the lifespan and caused so many coking issues recalled larger diameter tubes had to be installed constantly but N14 STC NTC and 855 big cams small cams and KTA’s we had them all but Cummins has ALWAYS Been my Families go to engine I’ve run them all over the US and don’t drive anything without a Cummins even my dually I’ve had a couple ISX’s but N-14 is what I stick with anymore and no one complains about me deleting them and I can change my head gaskets without a forklift in my driveway

[@deanchurchill2667]

My boss has 2 ISX Cummins one has 100k with mo issues. The other has 200k and drinks oil by the gallons. The driver had a guy ask him if it was deleted because the stacks are black on the inside.

[@sandasturner9529]

I thought so with the isx 15 but I heard that the x15 is better.

[@SmartTrucking]

I'm hearing that from guys here too.

[@maxpuppy96]

Detroit DD16 are the best engines on the market right now in my opinion.

[@arireid1245]

Wow!!!

[@terryarnold4492]

I go to church with a guy that is a customer service rep for Cummins, he told me that Cummins has been having meetings lately discuss the fact that they want to stop supporting the pre-emissions motors. I don’t know if it’ll actually happen or not but just the fact that they are discussing it is pretty sickening.

[@gregp.80]

The company I drive for turned up my speed and horsepower while I was doing a 36 hr restart at the house. It saved me from waiting in line at the shop.

[@SmartTrucking]

That's cool!

[@dposer10]

Seeing as they couldn't get the LAST series of engine to stop knocking so loud that it would physically hurt the drivers ears, I'm not holding my breath.

[@SmartTrucking]

That got a chuckle out of me!

[@dposer10]

@@SmartTrucking Yeah its kinda a shame, the isx in my last kw was a great running engine, and the transmission was really slick shifting but the engine knocked so loud I couldn't deal with it. The truck only had 2500 miles too.

[@tommyreed4220]

I have an ISX 13 speed the key to keep it on the road oil changes at 10 k and absolutely no idling not even five minutes!!Idle will set those def codes off and deregulate you in three hours.They are good but very temperamental.If any leaks fix it ASAP do not let anything go!!

[@SmartTrucking]

Good tips to know Tommy thanks, I'll pass those along! The ' no idling ' thing could get annoying I bet, if you were living in the truck.

[@rickduncan1871]

I have isx 550hp 470,000 still runs strong! My gripe is all the money that I've sunk in on the def system! Thousands of dollars good grief!!!!

[@lungelinecowboy]

ISX had liner issues near the end. If you were lucky it puked on warranty and you got the updated liners in the rebuild. Know of many rebuilt between 400 to 600 thousand. Waiting to see how the new x15 is with time. Won't buy a Detroit cause of their plastic oil pick up tubes. Know of too many rebuilt for low oil pressure due to o rings or cracked plastic. Paccar has been great but this year Paccar starting locking out my ecm even though my shop has the davie software. Only way to get it unlocked is to go to the dealer and allow them to do a software update. Next truck might have a Cummins due to the more friendly software for diagnosing and a warranty that gets stood behind at the shop I know. I've had enough with a dealer locking out my ecm on a truck I own.

[@SmartTrucking]

Wow! I'd get rid of that dealer immediately!

[@felixwankel3989]

I suspect many who have issues with the ISX are lugging the engines way too much. I pull heavy haul. The 475 I had never had any issues the 6 months I had it. The 550 I have right now has given me no issues. I rarely sit below 1500rpm except when cruising at below 80 km/h. Lugging makes a glorious deep sound but it's also a good way to fuck the engine.

[@Capitanvolume]

Diesel mechanic here. Cummins are still pretty good. The problem with cams is all about the long oil change intervals, use cheap conventional oil and change it more often. All the trucks that I do cams on are those guys who says "I saved thousands by changing oil every 600 hours", right before they get a 6k bill. Best engine is a series 60. Reliable, cheap to fix and own, sip diesel. They just lack power.

[@SmartTrucking]

Thanks for the info! I've never been a fan of long interval oil changes.

[@chopperjohn1046]

Use AMSOIL with a bypass Oil Filter

[@SoCal780]

As I said in this live chat, I love my Cummins ISX. I had a 530 hp, wore that out, and then replaced it with a 565, which I still have now. It has 1.4 million miles on it and still going strong. Replaced the head last summer but the block and cylinders are still in great shape. Cross hatching still quite visible. 👍 Replaced the fuel injector cam but the valve cam was fine so it’s still going strong. Just put in a fresh batch of AMSOIL yesterday. Good for another 50k miles! I’ll buy a 3rd Cummins when the time comes.

[@SmartTrucking]

Good to hear! Clearly you've got a good engine dealer I would guess and that's a great thing. When I ran Cummins I had trouble finding a good Cummins shop close to me. In fact, I used to get mine worked on at a dealership in Utah.

[@SoCal780]

@@SmartTrucking wow! Yes there is a Cummins dealership about 15 miles from where I live but I get most of my work done at a small family owned shop here in town. Cummins did my engine replacement but the shop I use is a Cummins shop and they handle all of the maintenance on it as well as on my whole truck. The guy who owns it is a reserve sheriff’s deputy so I’ve always trusted him implicitly. He also has a degree in mechanical engineering and knows Cummins engines inside and out. Interestingly enough, he’s not a big fan of the new Cummins X-15. He prefers my ISX over the X-15 hands down. Says it’s a way better engine and is much more reliable.

[@frankwodowski8299]

My company got 2014-16 cummins isx 450 horse all been rebuilt at 600000

[@SmartTrucking]

Yup! Not too good!

[@harold562]

Paccar does the whole gps thing on the model I got.... =_= a pain in the butt to pass someone and getting to the uphill just to be locked back from 68 to 65 now doing the same speed as the guy I am trying to pass, even if I am pressing gas to floor, at least on the cruise control so far, which I need on for the 68 limiter, 65 on pedal..... Detroit was a lot better on my previous truck as pedal would override the whole throttle cut back.

[@antolintaveras7914]

Ia the cummins from china reliable. I think they are not good like before right?

[@TacticalTrucker]

I know for a fact that ever since Freightliner took over Detroit Detroit engines has been going down

[@chriswoodward5368]

If it was only that simple. All manufacturers have problems and I don’t Think one is better than the other. The real problem is it takes a few years to know if a engine is good or not once you find a good one that series of engine or CPL is no longer made. Your local dealer may be far more important to you than you think. So there no one answer that’s fits all. Rempet it is not how many mills the trucks has on it how much work it has dun so fuel burnt. Just bought 5 X 15 Efficiency series at 500 HP and we are very happy with them phenomenal fuel mileage at 110,00 lb way better Then the Detroit or the Paccar.

[@kendaljohnson9691]

I drive a kenworth t660 daycab for a local farm. Its got a isx 12 its got all that emissions junk on it. Its got a junk 10 speed auto transmission the engine has supposedly been turned up but it don't act like it its pretty good on fuel though but I've also had a share of driving the 2 peterbilt 378s my boss has they have got the n14 celect plus with 10 speed manuals. The engine in one of them is wore out got over a million miles on it but she still out pulls the t660 I drive no joke.

[@kennethd9344]

I don’t know I always love the older Cummins you can put them back with duct tape and wire dispatches fuel or sail boat fuel

[@SmartTrucking]

Yup, loved the older ones!

[@matthewhansen5008]

Last good Cummins was Tan colored.

[@Graveltrucking]

Yes the 400Big Cam II and III

[@SmartTrucking]

I gotta agree!

[@johnbaskett2309]

My early years of driving was all logging trucks in the steep country of North Idaho. The 855 was king in those days, but the detroit 8v71 wasn't far behind. The 1693 wasn't popular because of weight and cost. They also lacked compression braking. Hydraulic braking over heated quickly. Mack's 300 six was somewhat reliable, but too underpowered and the v-8 Maxidyne was a total pile of junk. From the cost of operation perspective, Detroit won the battle. Although they had to be rebuilt more frequently and tended to have higher fuel consumption, especially the 12v71, the cost of rebuilding was much cheaper than Cummins. Cat has always been very proud of their parts. The detroit 92 silver series made a splash, but didn't dethrone the 855 cummins. It was the last cummins engine that was reliable. L series wasn't bad, but way underpowered for logging applications. K series was a nightmare, although, due to it's large displacement , had a phenomenon engine brake. A big plus in a logging truck. The 60 series detroit became somewhat popular for a short time , but after the E model cat(almost a 60 series clone)came out, and the later C models, there was nothing that could compete. The ISX was a total disaster. I worked for a large trucking company in Fairbanks Alaska, who ran the haul road to Prudhoe Bay, that bought a few for a trial. They were so bad, after the first year we took E model cats out of wrecked rigs and replaced the cummins so we could run out the trucks. Trucks with a ISX had very little trade in value. Cat wisely got out of the automotive side of things, leaving detroit the go to engine on the haul road these days by default. This DEF crap is a nightmare in cold country. Biden and the "Green New Deal" bullshit will destroy what's left of trucking.

[@MistrZIGZAG]

Ugh! I have weekly emissions problems on my dd16 and the shop has no idea what to do. In the last 2 years I’ve been derated close to 100 times. All of our company trucks do the same thing. Screw Detroit

[@michaelwright1602]

Change the sensors out related to your EGR system. I believe you can remove the EGR valve and clean it like you can on the ISX, I would do that, get as much soot out of the motor, mainly the intake side. And the cans, they need to be removed and cleaned properly, or replaced if face plugged. you will need to drop them to inspect. Also, the fuel doser and SCR dosers need to be replaced periodically, if you are up there at around say 500,000 miles, it is a good thing to do. Also, the NOX sensors on the cans, they only last so long too.

[@AbcXyz-rn2lz]

They can already remote govern by making adaptive cruise and pedal use eld nav app speed reporting... Omnitracs has it they turn it on or off remotely.. 55 in a 70 lol

[@GenderSkins]

You know I had a Cummings in my 99 Dodge 1 ton, never had any issues out of it that was not caused by me or a screw ball mechanic that did not do something right. And it had been an old fleet truck before I got it, and I used it for hot shot work. But I seen a lot of them with blown head gaskets or cracked heads, from people souping them up so they could roll coal and do burn outs with them. But given a choice I would take an old Caterpillar diesel any day over a Cummings. And I do not hate Cummings, I just like Caterpillar better.

[@18wheelzofsteel53]

I have an x15 500/1850. I've driven it about 98k so far no issues....

[@SmartTrucking]

Good to hear!

[@Trevor7727]

my EGR Red Motor have 3 rebuilds in 550k miles

[@codytaylor2701]

DD15 spin main and rod bearings

[@jeffsteeves359]

Hi Dave jeff from n.b

[@SmartTrucking]

Hey Jeff, what's going on?!

[@secondchance7487]

I have. The X 15 performance motor 605 hp

[@SmartTrucking]

How many miles on it and how has it been?

[@jerrykinnin7941]

ISX is Cummins Silver series 8v92. New modern motor DD15 all the way.

[@SmartTrucking]

Agreed!

[@dchawk81]

There would be a code involved. If they just give it to any and all dispatchers, don't work for that company.

[@ericgilhart5951]

The Cummins in my new Freightliner is slow I still would rather take the old international with a manual transmission if that says anything about the new Cummins I don't know what else to say

[@michaellangdonful]

Did your own first Kenworth have a Cummins in it? How bout your second Kenworth?

[@SmartTrucking]

Yes, both my first and second KW's were 400 Cummins.

[@sandasturner9529]

That sounds fun 😊 think of a frieghtliner that only has 200 hp @ 1500 rpm and only 1000 lbs-ft torque woohoo 😅😂🤣😭

[@SmartTrucking]

Toughest part of that job would be not falling asleep at the wheel!

[@damonellenson7736]

09 KW with 1.5miles never touched Cummins cms871 isx 500hp

[@SmartTrucking]

Good to hear!

[@leleetifra8818]

Cat 15 ,cat 13 single turbo n 14 Detroit 60

[@PleasePancakeGD]

loved the pre emissions cummins, stranded too many times with the 1st generation emissions, still don't trust them.

[@SmartTrucking]

Me neither!

[@TacticalTrucker]

I have the comers X 15 performance series, 505-600HP and I’ve have had no issues whatsoever with the engine, my gear ratio is 3.44 which is a gear ratio geared for pulling power, and I still get 7.8 8.6 miles per gallon westbound I 80 frozen meat 76 to 80,000 pounds I doubt Cummins engines after the X 15 is have any real issues that you are video is titled But, if you hack your DPF filter or remove it entirely you will definitely have a better performing engine

[@SmartTrucking]

I hear that!

[@kontrolledkhaos4853]

I’m just about done with Cummins anyway my next truck I get I’ll really be picky as fuck

[@iandermott6558]

Turtle here why did cat roll over and give up there truck engines they ruled they totally gave up and left alot of truckers to fend for themselves and now it makes gliders more difficult as well with the new emissions

[@BlockBallerRecords]

I’m with u on That One 🍻⚜️👌🏾🥂

[@SmartTrucking]

Cat still sells all the parts you need and services their existing engines. They just felt that the EPA was making impractical demands of the engine manufacturers that would make the engines unreliable after 2010. Turns out they were right.

[@hughjass1044]

Back in the late 70s, early 80s when I started, a lot of guys wouldn't touch Cat engines because of the warranty problems. If they are the head of the pack today, something sure changed since those days.

[@slooo9]

Whats your opinion on the Paccar x13

[@jnk26]

I currently drive a 2020 X15 500hp/1850lbft, its a dog even bobtailing. 18 spd RTLO-20918B w/3.91s. My 500hp/1550-1750lbft ishift w/3.25s walked this this truck everywhere I go. I'm pulling a tri-axle live bottom at 120k(53,272kg) vs my 140k(63,500kg) B-trains. One thing I absolutely HATE about this X15 is, when your engine speed is at 1450rpm or more. It sounds like the motor is throwing a rod almost. Or like the old EMD 2-Stroke trains(731v16s). Of course the 3.91s vs the 0.73 OD means 1600rpm for 105km/h. I had driven a 2013 ISX 15 500hp/1850lbft in a Pete and it was worn out at 808km. There wasn't anything special about that truck either(RTLO-20918B w/3.55s) it got a new turbo at 744k and she quit near 50 rd on the QEW almost 3 weeks after the turbo r&r. 3 liners were toast in 2017. Company replaced all the trucks with the Mack MP8 505C (505hp/1860lbft) w/mDrive and 3.58s. I think my Volvo with 3.25s was better(faster and better mileage). I pulled the exact same trailers(Westcan 11310+B) with all three trucks and I prefer hands down my Volvo even though its the same engine-trans in the mack the programming is different. That Volvo d13 had its first issue at 680k(stuck egr valve) warranty covered it no issue. It soot loaded the motor, killed the turbo, plugged the EGR cooler(cleaned) and screwed the DPF. All in a $26,200 repair. Warranty covered all of it. I did change the transmission because I forgot to change the coalace filter in the air dryer and filled the control actuators with oil, there was typical wear for 850km(350k of it at 140k) so I opted to change the whole trans(2 year warranty) at $22k. She is still working well for the guy that bought it. He did a set of injectors as a precaution a few months ago as one was reading low. Even pulling g 140k I was getting 2.2- 2.6km/L(6.27mpg winter, 7.33mpg summer canadian gal)

[@SmartTrucking]

" a dog even bobtailing! " I almost sprayed my drink on my laptop! Thanks for the chuckle!

[@jnk26]

@@SmartTrucking at first suspected the Cummins Nanny VAM(vehicle acceleration management), as most economy series engines come with the whole list enabled. For "protection" of the driveline with new drivers lol. I had the company remove the nannies at the dealership and it was slightly better, but no where near how a 500hp should run at 19050kg tare(9150kg tractor). I drove a 410hp 12.7L S60 w/15spd, running 63500 up clappison corners(hwy 6 north from 403) that would out run this new 500hp slug. Once the old 1998 square hood star got up to speed she was happy. Thinking about it even the 2009 450hp(435hp is more like it) Benz I used for truck and pup at 59000kg gross was better(RTLO18918B w/4.10) The company have other 500/1850 X15s that move better but still not up to my expectations for a 500hp motor. When I worked for Westcan there was another driver that said the same thing about the 505c MP8 vs D13 500hp/1850lbft, he had 3.58 in his trucks. He owned 3 trucks and was a company driver for Westcan. He still drives for them, but sold his iron and getting ready to retire. I have never been a fan of Cummins and everything I touch confirms my dislike for them. With the few exceptions of a 1994 280hp L10, and the only choice in transit buses, the 8.9L ISL9 275hp/1150lbft.

[@roscoebarnes1222]

I have little to no issues outta my Big Cam. Sure she ain't got the power the newer engines do.....but check ya rearview.....that long line of coal is me coming.....when I roll by I promise I'll shatter that fiberglass good of yourn lol

[@SmartTrucking]

The big cams were good engines.

[@roscoebarnes1222]

@@SmartTrucking They are but one thing people need to realize about a Big Cam is they can only handle so much power wise. Case in point there's an individual locally with an 83 359 along with a 400BC. He's built that Big Cam to 600hp but it requires an inframe every 6 months

[@eddierotary]

I drove a '12 freightliner with a isx15 and a '20 freightliner with a x15 effiency series and i hated the x15 because it didn't give me the power wne i need it. Vs the isx i had plenty of pulling power. Idk i hate when a computer controls what you need

[@SmartTrucking]

Yeah, me too!