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 ISC Power Module Upgrade (+20%) Turned My 350HP Into …
Oct 25, 2019 · As you can see in the attached picture, my 2003 Cummins-ISC-350HP-CAPS engine was putting-out 347 HP on the dyno; and after we installed the AG Power Module the engine was …
Cummins ISC 8.3 CAPS - Possible Alternative to FASS upgrade?
Feb 17, 2020 · Similar threads Original Lift Pump Reliability on 1997 to 2003 Cummins ISC 8.3 Roland Trombley Mar 31, 2026 Cummins Engines Replies: 17 Views: 1K Monday at 9:44 AM jacwjames
Cummins 5.9 loses prime when cold - iRV2
Mar 18, 2011 · My 1995 Cummins 5.9 230 has lost prime three times in the last 15K miles. Twice going to Yuma last year and once a couple of weeks ago. All three times temperature was below freezing. …
Can a Cummins 8.3L ISC 2150 330HP be tuned up - iRV2
Apr 28, 2021 · So if cummins make a 270hp version all the way up to a 450 version you can tune the motor any where in between, or more! But the service life of a 450 marine ISC and a 350 isc are 2 …
Finding Replacement Exhaust Manifold for 2008 Cummins 5.9 with EGR
Feb 23, 2026 · Members are troubleshooting a significant exhaust leak on a 2008 Holiday Rambler with a 5.9 Cummins engine, which is unusual for that model year. The original poster is seeking …
Is a Cummins ISB a bad way to go - iRV2
Mar 17, 2011 · Where exactly are you getting your information regarding the reliability of the Cummins ISB engines? In the size coach you're considering, some might consider them underpowered, but …
Freightliner with cummins 6.7 fan hub failure - iRV2
Dec 8, 2025 · Members report recurring failures of the fan hub on Freightliner chassis with Cummins 6.7 engines, specifically the shearing of mounting bolts and subsequent hub detachment. The original …
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 …