Best and worst Cummins ISL 400 engine years - iRV2
Sep 5, 2022 · I’m looking to buy an ISL 8.8 or 8.9 engine with the common rail fuel system and without the DEF system. What are the best and worst years to buy? Also, any...
Cummins 6.7 ISB Oil Capacity Confusion: 12, 15, or 17 Quarts?
Feb 20, 2026 · Members with the Cummins 6.7 ISB engine on Freightliner chassis report confusion over oil capacity, as the manual often lists 12 quarts, but the dipstick reads low even after filling to that …
Cummins ISL9 engines....Good, Bad or Ugly? - iRV2
Jun 22, 2025 · The **Cummins ISL 425 HP** (often the ISL9 or ISL 8.9L, depending on year) is generally a **strong, reliable engine**, but like any heavy-duty diesel, it has some known issues …
When Should You Adjust Valves on a 5.9 Cummins With High Mileage …
Feb 14, 2026 · Members with extensive experience on the 5.9 Cummins engine generally agree that valve adjustments are rarely needed before 100,000 miles, especially if the engine is running …
Cummins ISX 600 Cranks But Won’t Start—Lift Pump or ... - iRV2
Feb 10, 2026 · Member Title: Cummins 600 ISX Turns Over Fine, Won’t Start Members quickly focused on the lift pump as the likely culprit when a 2008 Magna with a Cummins 600 ISX would crank but …
New Cummins oil change question - ramforum.com
Dec 1, 2020 · Just bought a 2024 2500 with the 6.7l Cummins. It’s my first diesel. It has 4000 miles on it, question is what are your thoughts on what oil to use, Manual says 10w-30 rotella above 0* ambient …
History of 8.3L Cummins - iRV2
Jun 5, 2011 · Cummins keeps a complete record of your engine specifications including pump and governor by engine serial# (only 8 characters long). Any subscriber, or anyone with access, to …
Excessive Blow-by Cummins 5.9 24V | Page 2 | iRV2 Forums
Jul 10, 2021 · The Cummins 5.9 can be over bored .020" and then use oversize pistons.
Cummins ISL 400 Engine Failure - iRV2
Jul 8, 2017 · Not to bring up an old problem with Cummins ISL 400 engines, but I didn't know it was an old problem until we recently (June 2017) experienced catastrophic engine failure and started …
How to trigger Manual ReGen ISL9 Cummins - iRV2
Mar 21, 2025 · I have a 2018 Tiffin w/ Cummins ISL9 450 HP . Can anyone share how to trigger a manual REGEN? I've searched and the only thing i can find is the Cummins Insite software with the …