MX13 to Cummins ISX Wiring Questions

Cheapest option would be to find a like for like MX motor and install that instead. You can get a sub 500k used one for about 15K +/- around 5000 depending on quality year and condition and last time i looked. Toss on about 5000-7500 if they wont take your MX as a core, brand new last i looked was around 25-30K for a mx engine. Plus then you would not need to make anything match or change anything else out. Labor would likely be between 5000-10,000 depending on how much of a pain in the ### the swap ends up being. Could be a lot more too if a bunch of stuff needs modification.

Now if you swap to a diffrent engine you start running into issues. The harness will partially work but a lot of adapters ends and such may and likely will need to be changed to fit. A lot of motor mounting hardware, radator hoses, fan shrouds, pipes and much much much more will need to be changed with the cost varying widly from bubbah making the parts in his basment for a couple K to $10K+ for a kit. And with that truck having 1 mil on it the stock harness is likely pretty rotted and worn so swapping it anyway wpuld just be smart. You would need some programing for the CCU and likely the ECM reprogramed to work. The emissions may need to be rerouted or altered to be compatable with the new engine (altered as in moving stuff around or swapping parts for compatable fits, not delete to be clear). You may end up getting a bunch of stuff on the transmission replaced depending on if stuff needs to be moved around. And a bunch more crap.

Honestly if your going to do an engine brand swap, unless your in cali or a other emissions nazi state or go to them a lotm i would call kustom truck and get a swap kit for a C13 or C15 and one of said engines then ploink a pre emissions engine in or any pre emissions engine and swap kit of your choice tbh. Cost will be comparable for the actual swap. The maintaince will be much lower though take more of it.

A like for like your looking at $40,000-45,000 tops if a shop does it for you and much less if you do the work yourself. A rebuild is $20,000 for a plat rebuild according to my local dealer. A swap to a diffrent engine entirely is going to start at low $40,000s and upto $80,000 for a shop to do it. And if you do that you would be smart to put a new transmission in. A 10 to 18 speed swap is around $15,000 installed as of 2 months ago when i did mine and if you do both at once you will easily get anothet million out of the rig for a small fraction of new price.

 

Maybe talk to kustom truck.
Kustom Truck Parts

 

Going from 10 to 13 is mostly going to be a wireing issue iirc so new harness maybe some sensors? Everything else should be simular enough a reprogram will fix it. Cant say how it would react to a deleted rig but assume same steps to undelete as a epa 10 engine for a dealer to install.

As for financeing i know a few but i wouldnt wish them on my worst enemy. Intrest alone would eat you alive. They are options in a pinch....but you would be better off just eating the loss then dealing with those bloodsuckers for more then a couple of grand. You MIGHT try foley cat over in colby ks though. They can maybe get you set up with a cat card for the engine install at least.

For now id recomend something like this.

2011 PACCAR MX-13 TRUCK ENGINE FOR SALE #3948

JJ has a pretty decent rep for good used and rebuilt engines. Or russ fisher truck parts in terre haute in is also good. Ive gotten a HUGE number of hard to get parts from him. Not going to lie his scrapyard has saved my wallet more then once