Wi | Mitchco - 1/24/2017 18:20
I don't know how much of the Maxxforce engine is a Navistar product, but the some of the castings, block, head, crank, not sure what else, is CAT. CAT got out of the on road engine business when tier 4 or final 4 started. CAT leased their engine casting molds to Navistar, C 13s only I think. Navistar was paying the EPA a penalty of something like $2,000 per engine for failing to meet the emissions standards. So a Maxxforce engine is basiclly a CAT made entirely by Navistar.
Remember Navistar is the company who gave us the 6.0 liter and then even more popular 6.4 liter diesels found in Ford trucks.
Mitchco
The MF13 started with a MAN D20, popular decent engine in Europe. They licensed parts of it to Navistar. Navistar did all of the casting/forging/assembly then put their fuel, air and afterteeatment systems on it. It was a disaster, massive EGR cooler, tiny conpound turbos, complex/cramped to work on, no compression brake, an all around steaming pile of crap. Eventually they abandoned EGR only and installed an SCR system from Cummins. I could've sworn they also added the Cummins/Scania based injection system but cannot find that info so I could be wrong. Even with the improved engine with SCR and compression brake, 73% of Navistar Class 8 trucks sold in 2016 had Cummins engines.
The CT13 offered in Cat trucks brief stint was the same engine.
The MF15 is the same scenario as the MF13 except it uses the lower end from a C15 Cat. Navistar eventually abandoned it and started offering the ISX instead.
VW now owns a portion of Navistar, they have mentioned their intentions to improve the engines. With VW owning Scania and MAN that may be possible, but the maxxforce left a big mark.
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