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 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 …
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 …
Cummins ISC fuel backflow when engine stops | iRV2 Forums
Oct 5, 2012 · When an ISC stops running, should the high pressure fuel flow back through the filters toward the tank? Is this normal to relieve pressure and extend filter life, or does it indicate a failed …
2020 Cummins ISB 6.7 Exhaust Brake Installation - iRV2
Nov 4, 2020 · 340-hp Cummins® ISB 6.7L NeWay® front air suspension V-Ride rear air suspension OptiView™ dash, digital instrument panel cluster DriveTech driving system 160-amp. alternator Air …
Cummins Octane Gasoline Engine | iRV2 Forums
Mar 14, 2025 · I'm sure there are some non-believers, but I Hope this engine survives and makes it to the motorcoach level! Perhaps a trade off in MPG, but cost of fuel, 87 octane, less maintenance …
Transfer Case Seal Failure - 2024 RAM 2500 6.7 L Cummins Diesel
Jan 27, 2025 · Hello fellow RAM owners. Steelbob611 / Texas here. I am new to this forum and a first time RAM truck owner after a lifetime of being a GM truck and SUV owner. Made the switch and …
Cummins ISL9 450 - 13k miles with 2 major engine failures
Nov 12, 2021 · The Cummins-certified shop repaired the engine under warranty which included replacing the fuel injector, two pistons and sleeves, some turbocharger parts, and a new …
Cummins 8.3 Engine Evolution - iRV2
Sep 24, 2015 · Many of these are equipped with Cummins 8.3/ISC engines coupled to a 6-speed Allison which looks to be a great combo. I also am partial to Cummins engines after my experiences with the …
Cummins 8.3 ISC valve train problems - iRV2
Aug 29, 2022 · I have a 2001 Monaco with the 8.3 ISC 350. It developed a rattle sound at above idle RPM. Took it to Cummins NW in Portland Oregon. They said #2 hole is dead. They checked the …