dendrill Posted December 12, 2006 Share Posted December 12, 2006 Looking at a U model w/ a 300+ and a 5 spd. I think it is a 1985. I didn't seem to find much on the 300+ here; is it known by something else? Good motor? Quote Link to comment https://www.bigmacktrucks.com/topic/1833-300/ Share on other sites More sharing options...
Lmackattack Posted December 12, 2006 Share Posted December 12, 2006 its not a 300+ if a 5 speed is behind it. the 300+ was not a maxidyne. it needed more gears to keep it in the "sweet spot".If its a tip turbine engine with a 5 speed its likely a 285 maxidyne. if it has an air to air intercooler in front o the radiator it may be a 300hp maxidyne?The 2 valve 285 was a very reliable engine so was the 4 valve 300. very easy to work on and most parts are still availible. knock on wood Quote Link to comment https://www.bigmacktrucks.com/topic/1833-300/#findComment-8889 Share on other sites More sharing options...
dendrill Posted December 13, 2006 Author Share Posted December 13, 2006 Thanks lmackattack it has an air to air so it must be a 300 maxidine. Quote Link to comment https://www.bigmacktrucks.com/topic/1833-300/#findComment-8915 Share on other sites More sharing options...
mudslut28 Posted January 3, 2007 Share Posted January 3, 2007 LOL For a while there Im surprised Wal-Mart didnt have 2 valve Mack parts. You could and for the most part still can buy em anywhere. Quote Link to comment https://www.bigmacktrucks.com/topic/1833-300/#findComment-9455 Share on other sites More sharing options...
Lmackattack Posted January 3, 2007 Share Posted January 3, 2007 That might be true WV but I find myself always explaining to the Dealership parts counter guys what a 2 valve is or what a tip turbine fan does LOL I hope Mack keeps stocking 2V parts or aftermarket venders continue too because I dont plan to change my 30 year old engine anytime soon.!!!! Quote Link to comment https://www.bigmacktrucks.com/topic/1833-300/#findComment-9463 Share on other sites More sharing options...
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