Cummins ISC - 700k miles

I thank 700,000 is above average for a 8.3. If you can have an inframe done built into the long term finance you would probably be better off. Take care of the crank, low interest and no worry of that a sudden engine repair. Large sudden expenditure and time off unexpectedly.

 

I spent 5 years with a deleted Isc in a Freightliner M2. Pulled a 4 place car hauler. Always at 52000lbs. Ran great, pulled hard. Then it dropped a valve at 800 000km. Luck of the draw. I've seen almost new engines do that.
If it isn't using oil, or putting coolant in the oil I'd run it nicely till the engine actually needed work.

If it needed replacement, with those kinda miles on it. A drop in would be the way to go. New harness, injectors, turbo all in 1 nice package.

Or find the next decent inexpensive truck to replace it with.

 

The 2009 Kenworth T370 with the Cummins ISC engine you’re considering sounds like a well-maintained vehicle, fitting your needs perfectly. Here’s a detailed response to your inquiry:

Engine Longevity and Reliability
The Cummins ISC engine is renowned for its durability and longevity, especially when paired with meticulous maintenance. With proper care, these engines can indeed last up to a million miles without requiring major rebuilds. The fact that the original owner has kept detailed logs and performed oil changes every 10k miles, along with early preventative maintenance, is a strong indicator of the engine's good health.

Specific Maintenance History
The thorough maintenance record, including a turbo replacement at 600k miles, is reassuring. The absence of oil leaks, blow-by, and coolant consumption, coupled with the fact that the engine never overheats, points to a well-maintained Cummins ISC. These engines, when treated well, are capable of impressive longevity, and the owner’s confidence in its ability to reach a million miles is a good sign.

Usage and Condition
Given that the truck was primarily used for expedite hotshot work with an average load of 15k lbs, the engine hasn’t been overly strained. This lighter duty is beneficial for the longevity of the Cummins ISC engine. Additionally, the Eaton 10-speed transmission with a brand-new clutch adds value and reliability to the overall package.

Considering a Rebuild
While the Cummins ISC is known for its long life, considering a rebuild is prudent for planning purposes. Rebuild costs can vary but typically range from $15,000 to $20,000, depending on the extent of the work and parts needed. This estimate includes labor and parts, though prices can differ based on your location and the service provider.

Final Recommendation
Overall, the 2009 Kenworth T370 with the Cummins ISC engine appears to be a strong candidate given its maintenance history and current condition. However, it’s crucial to have the truck inspected by a trusted mechanic to confirm its state and ensure there are no hidden issues. If the inspection goes well, this truck could serve you reliably for many more miles.

In summary, the Cummins ISC engine is highly reliable and, with the detailed maintenance history provided, this truck seems like a good investment. Ensure a thorough inspection before making your decision, but all signs point to a promising purchase.