morristhecat Posted December 15, 2005 Share Posted December 15, 2005 A member of my family just purchased a 1978 rd600. He was told it had a 237 engine ,5+2 trans, and 58 rearends. this truck has tip turbine aftercooler and I thought only the maxidyne 300 series had tip turbines. I asked if it was a 675 or 676 and he didn't know. So if any one knows if a 237 came with atip turbine I'd really like to know? Quote Link to comment Share on other sites More sharing options...
Barry Posted December 15, 2005 Share Posted December 15, 2005 To the best of my knowledge, there were no 237's with tip turbines...300's and 300 plus's had them, but not the 237.BTW, welcome to the site! Glad to have ya aboard! Quote Barry - Watt's Truck Center Parts Manager and BMT Webmaster...1-888-304-MACK Link to comment Share on other sites More sharing options...
Lmackattack Posted December 15, 2005 Share Posted December 15, 2005 I have a 1978 285 HP tip turbine. with a 2 stick 6 speed. engine code ETAY676 Maxidyne283HP@2100RPM 1080 ftlb @1020RPMthe ETAY673 and ETAZ673 I belive were econodynes and rated to 315HP 1080ftlbs. They were recomended to use with gearboxes with 9 + speedsI think the 237 was a ENDT675 with 900 ftlbs.look on the pass side of the engine for a tag with engine code info Quote Link to comment Share on other sites More sharing options...
RFC Posted December 17, 2005 Share Posted December 17, 2005 My '78' R686 has a ENDT676 283HP with a tip turbine aftercooler. Cheers, Rob Quote Link to comment Share on other sites More sharing options...
pennsyjeff Posted December 17, 2005 Share Posted December 17, 2005 I purchased a wrecked '78 RD model for the engine to install in my '64 B61 that had a bad engine. It sounds like I have the same engine you are talking about. It has the tip turbine fan with side mount aftercooler. Here are the numbers off the front cover of my motor: ETAZ673A. I am in the process of installing it in my B model right now.... Quote Link to comment Share on other sites More sharing options...
b61mack Posted December 17, 2005 Share Posted December 17, 2005 Sounds like you have a 300+ witch is a 315HP, the ETAZ673 is a 300+, does it have a robert bosh fuel pump or an american bosh. Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted December 18, 2005 Share Posted December 18, 2005 The 237 motor does not have a tip fan. Also the pump should be different. the difference in the pumps are easy to tell, the 237 pump has a sloped top on the govoner(where the 6 bolts hold the cap on to keep people out of the fuel adjustment). the 300 motors have a flat top on the govoner. thats how u tell whether its a 237 or a 300. joe Quote Link to comment Share on other sites More sharing options...
pennsyjeff Posted December 21, 2005 Share Posted December 21, 2005 Sounds like you have a 300+ witch is a 315HP, the ETAZ673 is a 300+, does it have a robert bosh fuel pump or an american bosh.←I looked at my engine today, it has a Robert Bosch fuel system....... Quote Link to comment Share on other sites More sharing options...
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