07 12.7 d60 or 12 dd13?

In my off road short haul experience, we had a lot better luck finding and actually repairing problems with the epa 10 and newer trucks than we had with the epa 07's.
But the epa 04 trucks by far beat them both out. So it depends if the 07 has after treatment or if it is EGR only.

 

Depends on the model year the Series 60 is. An '07 engine will have the DPF. Many early '07 trucks still had left over '06 engines that were EGR only.

 

Looks like a glider to me.

 

So there where 3 major changes made by diesel engine companies in the early 2000's -- EPA- 04 they added Exhaust Gas Recirculation (EGR), EPA -07's they added diesel particulate filters (DPF's), and EPA-10 they added Selective Catalytic Reduction (SCR w/ DEF). But they mostly made the changes mid year (usually July ish...) so you have to find out forsure what your getting in those change over years.

So... I'm also thinking your looking at a glider, I haven't heard of a 12.7 with any emissions (EGR), I believe EGR started with the 14L 60 series. Compaired to today's engines, it would be very simple with just a few sensors and harnesses. If it isn't bleeding oil, dripping out of the blow by tube, or smoking excessively. Its probably your best bet.

The last thing I can add, at one time Detroit would only sell an extended warranty with their rebuilt engines if the block was less than 10 years old, but they may have changed that since then.

 

The older unit is probably a 2007 truck with a 99-03 engine. Which doesn't condemn it or anything. Just that its final assembly wasn't in a freightliner factory. You probably won't be able to call up for parts with just the truck serial number. You'll have to supply the parts guy with the serial number of whichever component your working on. Not really a big deal either

The newer Unit was completed in a factory. Looking up parts is easy but it does come with those pesky emissions. Which shouldn't condemn it either, but it takes a "modern" style of driving to keep it out of the shop for emissions issues.