Mar 31, 2026 · Member Title: Is there anyone with a 1997 to 2003 Cummins ISC 8.3 with over 59000 miles still running with the original style lift pump?

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 spec.

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...

Feb 13, 2010 · 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 …

Mar 30, 2012 · I have heard others mention some bad years for the big Cummin's diesel called the ISX that produces 600 hp. One member said he was on his third teardown as the valves keep breaking. I …

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 …

Jun 23, 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 …

Feb 13, 2023 · Looks great! I'm digging the vent tank, I use a Cummins Fleetguard crankcase ventilation system on mine, but my vintage engine doesn't have a crankcase filter. Shame that Cummins didn't …

For a schematic of the engine side wiring for the Cummins ISB and ISC electronic engines, see Fig. 4 for a standard vehicle wiring diagram. For a detailed (partial) schematic showing the engine ECM …

Jan 17, 2021 · Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM. Compare the ECM code and revision number in the …