Maddog13407 Posted January 9, 2014 Share Posted January 9, 2014 odd butt when I took my heads off, they has the thin maxidyne gaskets and the fire rings but the heads don't have a groove for the fire ring to fit in,..... they fit above the surface. I put new gaskets and fire rings back on just how it was. maybe someone didn't know what they were doing? I know the gaskets are the same part number a s 237 cause we had one apart at the same time as mine and put new heads on it and used the same gaskets for both engines Quote Link to comment Share on other sites More sharing options...
57 bcr Posted January 10, 2014 Share Posted January 10, 2014 Copied this off the back of an early F model brochure (that was a copy from the museum).No date on it but it has to be early '62,I would imagine.Seems that by the time this was printed,the 205hp was upgraded to a blistering 211hp! Get in,shut up,and hold on!! LOL!! Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment Share on other sites More sharing options...
Joe Ditchkus Posted January 10, 2014 Share Posted January 10, 2014 Maddog What is the story on the END 707? What years were they produced and what model used in ? Thanks for any information. Joe D. Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted January 10, 2014 Share Posted January 10, 2014 I have seen the engine listed in an R model brochure and the truck on the cover had the bicentennial paint job so im guessin it was around 72-74? it has the engine listed in it as 200hp at 1800rpms with an operating ranger 1200-1800. the truck it came out of was a heavy spec 1962 B61SX and im guessi the truck originally came with a 711 and the owner bought this end707 as a short block and put it in the truck, we scrapped the truck as the frame was shot,sold the rears and the front axle and engine went into my truck an cab and 18 speed double over quad wet into my cousins B68 we repowered Quote Link to comment Share on other sites More sharing options...
Joe Ditchkus Posted January 10, 2014 Share Posted January 10, 2014 Again Thanks. Joe D. Quote Link to comment Share on other sites More sharing options...
james j neiweem Posted January 10, 2014 Share Posted January 10, 2014 I always thought the 707 was a gas engine. Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted January 10, 2014 Share Posted January 10, 2014 not this one. its def a diesel. has end707 on the timing cover and the engine is listed in the Mack R model brochure. ill have to find it. Quote Link to comment Share on other sites More sharing options...
james j neiweem Posted January 11, 2014 Share Posted January 11, 2014 May bee the 707 was the first edition of the 711. They must have done something to get the extra 4 cubic inches. Possibly head volume or maybe the Mack mathamititionswere having a bad day. Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted January 11, 2014 Share Posted January 11, 2014 the end707 was offered AFTER the 711 was dumped. same motor, less hp and has fire rings. still boggles me why Mack would even offer this end707 naturally aspirated engine in the 70's when the 237 turbo was available. Quote Link to comment Share on other sites More sharing options...
bullhusk Posted January 11, 2014 Share Posted January 11, 2014 the end707 was offered AFTER the 711 was dumped. same motor, less hp and has fire rings. still boggles me why Mack would even offer this end707 naturally aspirated engine in the 70's when the 237 turbo was available.I say the same thing about the motor in my 361 Brockway, it's a 1974 with a stroked 250 (super 250 937 ci) non turbo?? Why? Now if Cummins put a turbo on her... That would be a monster!BULLHUSK Quote Link to comment Share on other sites More sharing options...
james j neiweem Posted January 11, 2014 Share Posted January 11, 2014 Sounds like a lot of things were put into production before R&D and test trials were done. Probably in trying to keep up with the competition a lot of regrettable decisions were made Quote Link to comment Share on other sites More sharing options...
rickykarenpr Posted January 11, 2014 Share Posted January 11, 2014 64 Quote Link to comment Share on other sites More sharing options...
j hancock Posted January 17, 2014 Share Posted January 17, 2014 Found some info in a book with a revised date of 1977.END 707 ESI and END 711 ESI had the fire rings. Non ESI didn't.It is interesting that the footnote showing the 711 as export only.Send the 711 out of the country! Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
Maddog13407 Posted January 17, 2014 Share Posted January 17, 2014 still makes me wonder why Mack would even make the 707. why not just put the fire rings on the 711 and turbo it and use piston squirters Quote Link to comment Share on other sites More sharing options...
j hancock Posted January 17, 2014 Share Posted January 17, 2014 IDK. Maybe for city use? Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
Maddog13407 Posted January 17, 2014 Share Posted January 17, 2014 dunno, it came out of a B61SX from Ct. wish I know who owned it. ill have to find some pictures of the truck. was thinking it was a short block crate engine from Mack originally that the guy bought to replace the tired 711 that was in it but now im wondering. Quote Link to comment Share on other sites More sharing options...
Mike Posted January 18, 2014 Share Posted January 18, 2014 My 2 cents in wonder also of these motors are to be able to accommodate the same transmissions without designing a newer version for the latest motor? I don't know.mike Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted January 19, 2014 Share Posted January 19, 2014 i dunno, I can tell you this, when I first put my truck together with 10 speed duplex and it was useless behind the end707. couldn't ever split it and it was NEVER in the power band and was always lugging or screaming. ended up putting a triplex behind it and its a dream now. the truck it came out of had a TRQ7210 18 speed quadbox behind the end707. 1 Quote Link to comment Share on other sites More sharing options...
Mike Posted January 19, 2014 Share Posted January 19, 2014 So how would a END 673 react to this transmission TRQ 7210 ? I would think maybe a dog to shift and lug the motor?Mine has the TRD72 Duplex.I find it very interesting about the many uses of engines and transmissions that Mack used. I have not done my homework on this.mike Quote Link to comment Share on other sites More sharing options...
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