jimtruck Posted March 20, 2016 Share Posted March 20, 2016 Hello everyone, I'm new to the forum and new to Mack trucks. A 1964 B-75 recently found home in my barn, and I'm in the process of getting it running. My plan is to fix the truck up and use it to haul around the miscellaneous equipment that I come across. Its not going to see everyday use by any means, but I would like to be able to get it out and use it like it was intended to. The truck is equipped with a ENDL 711 with the added turbo and the transmission is a triplex. This engine has the heads with the large bolt (I think its 3/4) on the drivers side front and rear corner of the head. It seems that everywhere I look, there is talk about headgasket issues with this engine. I havent got it running yet ( injection pump problems) but if it runs good, I'd like to keep it in the truck. My question is, is there anything I can do to prolong the life of my headgaskets? With the triplex, I'm guessing that I wont have any trouble keeping my rpms up to avoid lugging. Are these gaskets failing due to excessive heat? Do the head/block deck have warping issues? Am I going to need to keep a spare set of gaskets in the passenger's seat? As I said, I'm new to Macks so forgive me for any dumb questions. This forum is a wealth of information and I'm very happy to have found it. Thanks for the help, Jim Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/ Share on other sites More sharing options...
seyser Posted March 20, 2016 Share Posted March 20, 2016 Like you already know, avoid lugging the engine. I think headgasket problems plagued the earlier 711's more than the later models. Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-327945 Share on other sites More sharing options...
mrgumby Posted March 20, 2016 Share Posted March 20, 2016 (edited) here is another topic Edited March 20, 2016 by mrgumby Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-327946 Share on other sites More sharing options...
Underdog Posted March 20, 2016 Share Posted March 20, 2016 Welcome, Jim. No dumb questions here, only dopey answers. For someone new to Macks, it seems you have done your homework on the truck you own. Sounds like a great setup, but we need pictures to make a fair assessment. We like pictures. Gregg Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-327969 Share on other sites More sharing options...
jimtruck Posted March 20, 2016 Author Share Posted March 20, 2016 I'll try and post pictures later today. What if I were to drill a few holes in the thermostat or just remove it all together to keep a constant flow of coolant through the heads? Ive done that on a few old tractors, but this is a bit different than a Farmall H!! Thanks for your replies, Jim Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-327971 Share on other sites More sharing options...
terry Posted March 20, 2016 Share Posted March 20, 2016 2 minutes ago, jimtruck said: I'll try and post pictures later today. What if I were to drill a few holes in the thermostat or just remove it all together to keep a constant flow of coolant through the heads? Ive done that on a few old tractors, but this is a bit different than a Farmall H!! Thanks for your replies, Jim If your thermostat is working why bypass it? A diesel runs better the warmer you can run it. Also I ran a 711 with a turbo fot ten years, think I might have put head gaskets on it twice, and that was a truck that was working every day in that ten years. terry Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-327972 Share on other sites More sharing options...
bluebonnet Posted March 20, 2016 Share Posted March 20, 2016 I have the 711 in my 58 B61 and no head gasket problems. The temp never exceeds 180 degrees in the hottest weather in parades or at highway speeds. Its working days are over, like mine. Victor Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-327975 Share on other sites More sharing options...
jimtruck Posted March 20, 2016 Author Share Posted March 20, 2016 Thanks for the quick replies! I just didn't know if the head gaskets could possably be failing due to lack of coolant flow. I'll just have to run it and see what happens- I doubt that I'll work it hard enough to cause it any problems. I just like to know a machine's strengths and weaknesses before I go about using/working on it. Thanks, Jim Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-327977 Share on other sites More sharing options...
Popular Post jimtruck Posted March 23, 2016 Author Popular Post Share Posted March 23, 2016 Here's some pictures of my new truck! 5 Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-328205 Share on other sites More sharing options...
jeffbyrne Posted March 29, 2016 Share Posted March 29, 2016 Great pics of your Mack Jim, thanks for posting. Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-328911 Share on other sites More sharing options...
seyser Posted March 29, 2016 Share Posted March 29, 2016 Looks like a nice truck. Welcome to the Mack family. Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-328919 Share on other sites More sharing options...
Freightrain Posted March 29, 2016 Share Posted March 29, 2016 Nice find. When you get it running, I would just run it and enjoy it. Granted mine is a 673, but I lost two head bolts in 15 yrs or running it all summer pulling my race trailer around 3 states. It always got me home, even it was "leaking" a bit. They are pretty sturdy engines, even if they have a few weak points. They likely will always get you back home. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-328937 Share on other sites More sharing options...
eddeere Posted March 29, 2016 Share Posted March 29, 2016 Jim the truck looks good in the daylight. Good luck and keep us posted Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-328943 Share on other sites More sharing options...
BOB DINGSDALE Posted March 29, 2016 Share Posted March 29, 2016 that's a nice looking truck in that color scheme . Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-328971 Share on other sites More sharing options...
felicello122 Posted April 3, 2016 Share Posted April 3, 2016 Nice ole girl, new paint and that will really pop Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-329392 Share on other sites More sharing options...
HarryS Posted April 3, 2016 Share Posted April 3, 2016 That's a nice one. Welcome. Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-329395 Share on other sites More sharing options...
70mackMB Posted April 3, 2016 Share Posted April 3, 2016 Sure is a good looker.......... Quote Link to comment https://www.bigmacktrucks.com/topic/44398-b-75-end711-questions/#findComment-329405 Share on other sites More sharing options...
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