ramshorn Posted June 27, 2018 Share Posted June 27, 2018 In Search Of Good ENDT673 Massachusetts Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted June 27, 2018 Share Posted June 27, 2018 gotta be more specific. lookin for a vintage B model junk series 673t or the better 60's and 70's endt673b or c motor 225 and 250 horse Quote Link to comment Share on other sites More sharing options...
ramshorn Posted June 27, 2018 Author Share Posted June 27, 2018 There is no other numbers stamped in front of the injection pump besides ENDT 673. Even on the build sheets from Mack say the same. #6 rod cap went and blew a hole is the block. I’m looking for something I can swap over parts to fix (thinking this is not possible because their is a lot of different 673’s out there) or just drop in other motor with minimal rebuild. Quote Link to comment Share on other sites More sharing options...
DM800guy Posted August 19, 2018 Share Posted August 19, 2018 I have a decent 237hp that would go right in there minimal mods and minimal rebuild. You need to do the injection pump over for the right fuel curve. Quote Link to comment Share on other sites More sharing options...
terry Posted August 19, 2018 Share Posted August 19, 2018 18 minutes ago, DM800guy said: I have a decent 237hp that would go right in there minimal mods and minimal rebuild. You need to do the injection pump over for the right fuel curve. I don't know what you mean by right fuel curve, but a stock 237 in front of a triplex or quad will be fine, I drove one that way for years, and it was a working truck, out everyday. terry Quote Link to comment Share on other sites More sharing options...
Freightrain Posted August 20, 2018 Share Posted August 20, 2018 Ditto. I really like my triplex behind my 237. I went to check on retuning the pump but they started talking THOUSANDS of dollars and that made my mind up to leave it alone. I only split 4 and 5th gears. Makes it nice actually to drop 1/2 gear on long grades and not have to lug it all the way down to 1100 rpm. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
Hobert62 Posted August 22, 2018 Share Posted August 22, 2018 Any idea if oil pan and oil pump pickup would switch out from my 673 to a 237? Being a b67 mine leans to the right and I think they would need changed over. Quote Link to comment Share on other sites More sharing options...
DM800guy Posted August 28, 2018 Share Posted August 28, 2018 The engine i have is 1979 235 with spin on filters. It's the later model. If you would like a picture of it PM me and i'll send it right over to you. As for the fuel curve gentleman. If the pump on the engine is set up for a six speed lo-hole which most of them were cause the 18 speeds went away in the early 70's to my knowledge but i could be wrong. The 18's and triplex's we are all talking about operate from 1500-2100. The lo-hole with the triple countershaft operates around 1200-1850. So the timing on the injection pump for the fuel delivery is different. Hence the term fuel curve. Quote Link to comment Share on other sites More sharing options...
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