1wonton Posted September 7, 2022 Share Posted September 7, 2022 My '63 B model has an engine with the number ENDLT 673C1Z2893; What engine is this? ron Quote Link to comment https://www.bigmacktrucks.com/topic/70409-what-engine/ Share on other sites More sharing options...
doubleclutchinweasel Posted September 7, 2022 Share Posted September 7, 2022 "EN" is for engine. "D" is for diesel. "L" is for the lightweight aluminum bell housing, I believe. "T" is for turbocharged. "C" is the particular revision. This is, I think, the last version of this particular Thermodyne. This is a 250HP, 700 ft-lb, turbocharged 672 cu. in. Thermodyne. A very good engine. 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/70409-what-engine/#findComment-508785 Share on other sites More sharing options...
1wonton Posted September 7, 2022 Author Share Posted September 7, 2022 Thanks Double, appreciate the input. ron Quote Link to comment https://www.bigmacktrucks.com/topic/70409-what-engine/#findComment-508792 Share on other sites More sharing options...
doubleclutchinweasel Posted September 13, 2022 Share Posted September 13, 2022 (edited) On 9/7/2022 at 2:18 PM, 1wonton said: Thanks Double, appreciate the input. ron The "C" was pretty common in later R, DM, U, and F models. Don't think they were ever original in a B model. Here is a .PDF of some info on that engine. The graph has the traditional signature of Mack engineer Win Pelizzoni on it. endt673c.pdf Edited September 13, 2022 by doubleclutchinweasel Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/70409-what-engine/#findComment-509257 Share on other sites More sharing options...
steve s. Posted September 14, 2022 Share Posted September 14, 2022 DC Weasel, I have a 1966 B61 that was built with a 673C engine. It has a rotary injection pump and a pressed steel intake manifold. There are many differences in this late production B model compared to earlier B's I have noticed. Quote Link to comment https://www.bigmacktrucks.com/topic/70409-what-engine/#findComment-509301 Share on other sites More sharing options...
doubleclutchinweasel Posted September 14, 2022 Share Posted September 14, 2022 46 minutes ago, steve s. said: DC Weasel, I have a 1966 B61 that was built with a 673C engine. It has a rotary injection pump and a pressed steel intake manifold. There are many differences in this late production B model compared to earlier B's I have noticed. Cool. I knew the "C" came out right around the end of the B's run. Was not sure if any made it into the B. I think the earliest one I personally saw was in a '66 or '67 R. May have been some in the earlier U models, but I don't know. That configuration on yours is different that I ever saw. Can't be too many like yours. A rare jewel to be sure. I don't think they made all that many B's in '66 (last year). Thanks for the info! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/70409-what-engine/#findComment-509304 Share on other sites More sharing options...
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