AutomaticMack Posted December 28, 2006 Share Posted December 28, 2006 Well I guess its time for a different engine since the old EM6-300 2 valve developed a crack after a long reliable life. Now I am looking at two choices, either another EM6-300 or a E6-350. I have never drove the 350 4V and would like to know more about the 4V series. What is the torque range on the 350 etc. Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/ Share on other sites More sharing options...
rick harper Posted December 29, 2006 Share Posted December 29, 2006 1360LB. FT. TORQUE @ 1200RPM Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9312 Share on other sites More sharing options...
fullfuel01 Posted December 30, 2006 Share Posted December 30, 2006 we run both of them, both are nice, different fuel pump and maybe turbo... Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9316 Share on other sites More sharing options...
AutomaticMack Posted December 30, 2006 Author Share Posted December 30, 2006 Thanks for the info!! Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9318 Share on other sites More sharing options...
MACKTRUCKS4 Posted January 1, 2007 Share Posted January 1, 2007 2 valve is the better bet, since the 4 valves where prone to cracking the blocks in the bottom end. Then they came out with the E-7 with buttress bolts to strengthen the bottom end to end cracking. Quote Live every day like it's your last, because one of these days, it will be. Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9411 Share on other sites More sharing options...
AutomaticMack Posted January 2, 2007 Author Share Posted January 2, 2007 Oh boy! I just purchased a E6-350 4V today, because I could not locate a good EM6-300..... the old 300 has developed cracks on the bottom end near the dipstick tube. I hope this other engine will last a little while before it too cracks. Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9448 Share on other sites More sharing options...
MACKS Posted January 3, 2007 Share Posted January 3, 2007 I know a lot of guys running the four valves from the mid eighties with no problem. Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9450 Share on other sites More sharing options...
mudslut28 Posted January 3, 2007 Share Posted January 3, 2007 I wouldnt worry too much about that 4 valve. I got a new one in 88 and it is still running every day and has been rebuilt once...amazing motor! Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9453 Share on other sites More sharing options...
AutomaticMack Posted January 4, 2007 Author Share Posted January 4, 2007 Thanks! I do hope this freshly rebuilt 4V runs as good and as reliable as the old 300 2v. Quote Link to comment https://www.bigmacktrucks.com/topic/1934-em6-300-or-e6-350-4valve/#findComment-9477 Share on other sites More sharing options...
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