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...

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 …

Jan 27, 2026 · The Cummins® Turbo Diesel engine is equipped with several features designed to assist cold weather starting and operation: The engine block heater is a resistance heater installed in the …

Sep 15, 2025 · I have a 2025 RAM 2500 with the 6.7L Cummins engine and I want to make sure I use the right motor oil and I've always used Shell Rotella. I looked in the owner's manual and searched …

Nov 8, 2018 · It wasn't till the 2019 Cummins (new CGI block) you started hearing about engine failures. What “engine failures” are you hearing/posting about? I have had my ‘24 Ram 2500 w/6.7 CTD six …

Apr 6, 2025 · Rolling down the road and coach completely shut off and won’t restart. Was running perfect until thisn. Its not getting fuel. All fuses, that i’ve found, have been good. I’ve read about an …

Oct 24, 2019 · We have a 17 Ram 3500 with 6.7 Cummins with 800 ft/lbs of torque redline is 3000 RPMs when loaded with equipment trailer the pedal is to the medal, no difference with our MH with …

Oct 13, 2022 · Cummins Great Plains replaced it after several days of diagnosing the problem. Then had to wait 5 days for a rebuilt one to arrive. Normally they had replacement parts next day, but the …

Nov 4, 2025 · :welcome: Are you sure about your HP rating ?? What year is your coach ? What series of Allison transmission is in your coach ? 2500 or 3000 ? At 300 HP , a 6.7 ISB is seriously detuned , …

CUMMINS COOLANT FLUSH - General Information Section 12 – Adjustment, Repair, and Replacement Page 12-51 CFP08E Series Coolant Thermostat Removal/Installation (Cont) Install CAUTION …