Dark Iron Diesel
Region: CA
Thursday 14 May 2026 22:59:03 GMT
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Jamie Fleming :
125000 miles and something cause a hole in the #6 cylinder. Wrapped the valve when the piston hit the head. It had been deleted for about 20000 miles.
2026-05-15 01:10:01
8
dtx_papirico :
I had a 2021 ever had issues I did all my services at 5k and ran the correct oil based in the time of the year as recommended by Cummins and never had an issue I put 110k on it I sold it not because it was a bad truck no. I honestly was one of the greatest trucks I ever owned I just wanted something different and ended up buying an L5P.
2026-05-20 04:40:05
2
jeddS107 :
Nope stock with cheetah, bank monster air, bank ram air and bank intercoolers, also deleted since 57k currently at 162k zero issues. Truck also has the common type writer tick after oil changes for 1-2k then it goes away on every oil change been hearing that tick since 60-70k.
2026-05-21 04:51:40
2
Wolfe :
23 had lifter failure at 53k covered under warranty deleted at 54k when it came back from the shop so far I’ve put 3k miles on it and seems to be doing good
2026-05-21 02:47:44
1
jordanficek :
220k miles on my 21 Cummins and she runs smooth and a Swiss watch
2026-05-15 20:49:38
0
casey :
21 Ram 5500, did hamiltom cam lifter's amd had harmonic balancer bolt's bolt's break off. so far my 17 amd 18 gen 4 habe never had anything beside's exhaust manifold and new hardware, and put a lift pump on the 17 because I alway's ran it till the fuel light came on which was probably my fault. The gen 5's are quiter and run cooler but after those major failure's, cummin's went the wrong route!👍 never knew they even had problem's with harmonic balancer bolt's breaking untill I had time on the highway to research it👍😂.
2026-05-20 01:21:01
1
S V :
It’s because they’re using the wrong weight of oil or they’re waiting too long between oil change
2026-06-08 14:52:02
2
Joe :
Every single 5th gen I’ve owned and seen has had lifter failure they are JUNK
2026-05-30 09:49:24
2
stephenbaker96 :
Deleted and tuned at 14000, 38000 miles now. I've noticed some typewriter sound since 5000 miles. Amsoil signature series 5/40 and I add hotshot secrets at every oil change. Hamilton swap is in the cards as soon as money allows
2026-05-15 02:15:31
0
Gavin :
92k miles been deleted since 67k bought it at 60k miles, been on tune 5 since day I deleted it, unplugged grid heater have banks grid heater just havent wanted to tackle that yet, the lifters are able to be heard but I havent had an issue out of them
2026-05-27 17:23:27
1
chase24v :
What oil you running ?
2026-05-14 23:39:25
9
V :
do you have the famous ticking noise at idle
2026-06-06 17:07:06
1
Kyle Boyer :
Had both of my trucks start making noise around 450k km the first one (2020) needed the cam changed aswell due to some severe pitting.
2026-05-20 18:28:07
1
jCap_2000 :
397k not one issue
2026-05-20 11:33:01
1
Danny :
240k MILES on a 2021 been deleted since 130k miles oil changes every 5k
2026-05-24 17:44:25
1
bennito05 :
120k km here, oil changes every 10k on a 2022. Deleted at 50k and no issues at all🤞
2026-05-15 00:51:57
1
JetBlackIndustries :
2024 6.7 H.O. 56K miles. Deleted 3 months prior and got the good ticking sound. Pulling it all apart currently
2026-05-21 03:03:12
1
Dylan Dupuis :
warranty work at 120 000km non deleted pushrods needed done
2026-05-17 17:10:56
1
ewirtz5.9 :
Wtf is a kilometer
2026-05-19 10:40:59
1
dougdonnelly :
Curious, how many kms do you go between oil changes. I have a 2023 with 85,000km and deleted it at 25,000km I go 6000 between changes myself.
2026-05-15 01:29:01
1
Okie_Slab_Seekers :
Stock for 70k and ticking since 40k. Pulled mine and changed to bigger pushrods all had wear on top and same for rocker arm cups inside.
2026-05-15 00:41:41
0
Jeremy :
Deleted 2024 , 79,0000 miles . I change the oil every 4,000 miles. Was randomly noticing a tick then became more noticeable. I just did the swap last week. My lifters weren’t terrible but had small little lines you could feel worn in.
2026-05-15 11:22:00
1
brek :
my buddy had issues at like 45k i think on a 2023
2026-05-15 00:33:12
1
hb :
2021—-36,000 miles stock nothing so far. Running Rotella T-6 @10knintervals
2026-05-14 23:51:27
1
user9316432759374 :
No doubt there was a quality assurance issue with some of these, but I believe it’s more about proper maintenance for most of the failures. People thinking they can neglect the maintenance and get away with it like the 4th gen and earlier engines
2026-05-31 20:40:22
0
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