Need Help T680

Personally I think it’s a huge gamble.

From what I’ve seen and heard, it’s a 50/50 shot on that engine.

Good luck.

 

On a Post Emission engine it's more like a 85% chance at 500k miles that it'll need a In-Frame.

The MX13 engine has alot of issues with the after treatment system.

 

MX13 after treatment is made by Cummins Emission solutions. I think used truck buying comes down to research and who will perform the maintenance. Preventive maintenance is key to making these newer engines/after treatment more dependable. You have to proactive on cleaning EGR coolers, pipes, pressure sensors that are in direct contact with soot. Air or exhaust leaks must be checked and repaired ASAP. Hell, small crack in flex pipe will cause NOx conversion/efficiency codes. Basically, whoever is doing the maintenance on the truck needs to be well versed in the engine/after treatment to avoid costly breakdowns. Do your research and buy whatever the person doing maintenance prefers/is knowledgeable on. Personally, I prefer the MX over the ISX, but I have DAVIE and INSITE and training with both engine platforms.

 

My fleet has 13 of the MX13 and 10 of the older MX 2010. All are 455 HP/1650 TQ. The MX13 has had less issue than MX10. No work under valve covers past a random injector or unit pump. No turbo issues, zero! Exhaust manifold do leak @ slips, but they will fix under warranty. Most issues involve after treatment. NOx sensors seem to last about 250,000- 300,000. Lots of software updates and campaigns to improve them. No oil usage problems and only one failed EGR cooler. All this being said, we change oil and filters @ 20,000 miles and grease every 5,000. Overheads, def filters, dpf cleaning, EGR system cleanup, etc is all done per Paccar recommended intervals.

 

Ask about the price difference between cleaning and a new DPF.