Nightspear

The 2007 emission engines had issues with injectors and cups but those issues seem to have been remedied with the stainless steel conical injector cups and conical injectors. The 2010 emission engines had problems with injectors as well but it was because of a coating used on the injector needle valve. Most of the injectors with that issue have been replaced by now. Your friend may have been thinking about or referring to the double idler gear failures. I think, but not sure, that problem had been solved for engines manufactured after 2012.

I will verify these have been fixed.

On a side note, it appears Volvo is no longer putting downloadable PDF engine spec sheets on the Mack brand website.

(2013 example: http://www.quincymacksales.com/assets/Uploads/Documents/6-MP7-395C.pdf)

I suppose Volvo simply wants you to take their word. http://www.macktrucks.com/powertrain-and-suspensions/engines/mp7/

I don't like to take manufacturers by their word, that's why I came to you owners for info. That way it the info is based on experience and not pushing a sale.

Wow! You guys are fast and informative! I didn't really think the emissions problem was exclusive to Mack, but I has to go on the info I had at hand,

This would often require the truck to pull over off of the road an would take a good deal of time. This was all if the system worked correctly. There are many of cases where the truck is rendered dead on the side of the road or in safe mode(no power).

I am not a trucker by trade, but is this part of the reason they enforce down time for truckers?

The 2007-2011 conventional cab trucks use a catalized dpf systems do have there issues which is usually a clogged 7th injector, air purge, and flex pipe issues.

Are these good places to start troubleshooting when a problem arises?

My brother-in-law runs a Sanitation business and has the opertunity to upgrade his 1992 International to a 2012 Mack GU713 quad axel with a 405HP MP7 and 10 speed transmition. However, the Guy that built his International advised him to stear clear of the 2007 - 2011 Macks due to something about their emissions (his exact words). Granted the Mack my brother-in-law is looking into is not in that range. He would still like to know what is wrong with 2007 - 2011 that he was recomended to stay away from them. Who would know better than the owners? So, I come to you to either disprove or confirm this recomendation. Any and all info will be greatly appericated. Thanks.