Cummins ISC - 700k miles

So a buddy of mine pointed to a truck that fits what I need perfectly in terms of how it's built. It's a 2009 kenworth T370 with the 8.3 ISC. The truck was deleted of emissions in 2011 and currently has 717k miles. The original owner has owned it since new and has kept logs of everything done to the engine. Oil is changed every 10k miles and is constantly doing early preventative maintenance. He says he'd drive it to a million miles with no concerns. Turbo was replaced at 600k miles.

So how good are these engines? Do they usually last this long with now major rebuilds? I haven't gotten to see it in person yet but the seller claims there is no oil leaks or blow by of any kind. Doesn't use coolant and never gets hot. He ran expedite hotshot work and rarely had more than 15k lbs on the deck. Which means the truck moved around at a average of 26k lbs. Has a eaton 10 speed behind it with a brand new clutch.

So what do you guys know? If y'all recommend a rebuild, about what does that run?

 

The truck is listed at 28500. And it's good to hear that it can be done in frame. That's saves a ton Right there. I know over seen people that say they are running strong at 700+ and some into the million range with out ever being touched. I just want to see if I could get some other opinions. Might see if the dealer could quote an In frame rebuild that way I can just roll it into the financing.

Also what's a safe option to getting a little more power out of these. This one is a 330 horse and I think 1000ft lbs? I'm mostly looking to get a little more on the torque side but nothing wild. Do I need it? No. But if the engine were to be rebuilt, a little more extra power would be nice.

 

Good point. I know the place it's being sold at is a used truck dealership / full service shop. But if that doesn't work, there's a handful of reputable diesel shops near me that could probably do it easily.

 

Price is a little high for what it is, but finding a truck built exactly the way you need it with the proper engine and trans is hard to do. At least for straight trucks with a sleeper and flatbed. I'm willing to pay a little extra to save me from having to modify a completely different specd truck.

And cummins has always treated me well. My go to engine. I called the dealer and they can do a In frame rebuild. So I will debate that. But seeing that the engine doesn't leak, or burn oil and coolant. I may leave it as is. I'll have to drive it and take a good look in person when I do.