Srays Posted January 13, 2018 Share Posted January 13, 2018 (edited) I have a 1964 Mack B61SX dump truck with the END673c engine. Does anyone know what the "c" designation means? I can't find any information about this. Thanks everyone for your great input! Edited January 15, 2018 by Srays Quote Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/ Share on other sites More sharing options...
0 terry Posted January 13, 2018 Share Posted January 13, 2018 673C was a 250 hp engine, about as big as the early engines were, predecessor to the 237. terry Quote Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389590 Share on other sites More sharing options...
0 theakerstwo Posted January 13, 2018 Share Posted January 13, 2018 The ENDT673c was a 250hp but he is saying END so i dont know about thm but i can remember the END some had a oil cooler and full flow oil filter and the ones before that did not have that. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389598 Share on other sites More sharing options...
0 j hancock Posted January 13, 2018 Share Posted January 13, 2018 Natural aspirated END 673C is a 187 HP engine. ENDT 673C is a turbo engine 250 HP as Terry and Glenn indicated. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389607 Share on other sites More sharing options...
0 terry Posted January 13, 2018 Share Posted January 13, 2018 (edited) 52 minutes ago, j hancock said: Natural aspirated END 673C is a 187 HP engine. ENDT 673C is a turbo engine 250 HP as Terry and Glenn indicated. Didn't know there was a C version in the nonturbo engines, learn something new everyday! terry Shows our age talking about these engines! Edited January 13, 2018 by terry Quote Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389614 Share on other sites More sharing options...
0 57 bcr Posted January 13, 2018 Share Posted January 13, 2018 Interesting. I thought the END673P was the only one that was rated at 187hp. Jim is right about the C. I have an END673D in the BCR,that the previous owner added a turbo to. That one started out as 200hp. Al 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 https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389615 Share on other sites More sharing options...
0 terry Posted January 13, 2018 Share Posted January 13, 2018 20 minutes ago, 57 bcr said: Interesting. I thought the END673P was the only one that was rated at 187hp. Jim is right about the C. I have an END673D in the BCR,that the previous owner added a turbo to. That one started out as 200hp. Al Don't forget the 711 engine, 211 HP with no turbo. I once had a B model dump with a 711 that local mack dealer put a turbo on, it was one of the best sounding engines i ever heard. Alot of people told me they could tell it was me coming by the sound of it. terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389617 Share on other sites More sharing options...
0 41chevy Posted January 13, 2018 Share Posted January 13, 2018 (edited) The END673 is a high compression because it's a non turbo. The END673 B and C are Turbo-ed and are a lower compression ratio with a larger wrist pin. The END673B and C also have piston coolers and I believe 20 head bolts as opposed to 18 on the END673. Edited January 13, 2018 by 41chevy Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389623 Share on other sites More sharing options...
0 theakerstwo Posted January 14, 2018 Share Posted January 14, 2018 Iam forgetting bad but i think the first END with a turbo was a 205 hp and i know it did not have piston coolers and i was thinking its wrist pin was the small pin.I was working at mack when the ENDT673B and C came out and it did have the large wrist pin and piston coolers and was same block as the maxidyne that came along next year.It had differnt injection pump and the fire ring in the head gasket. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389627 Share on other sites More sharing options...
0 terry Posted January 14, 2018 Share Posted January 14, 2018 2 hours ago, theakerstwo said: Iam forgetting bad but i think the first END with a turbo was a 205 hp and i know it did not have piston coolers and i was thinking its wrist pin was the small pin.I was working at mack when the ENDT673B and C came out and it did have the large wrist pin and piston coolers and was same block as the maxidyne that came along next year.It had differnt injection pump and the fire ring in the head gasket. wasn't that early turbo engine engine a ENDT ? terry Quote Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389641 Share on other sites More sharing options...
0 theakerstwo Posted January 14, 2018 Share Posted January 14, 2018 Terry i cant remember what they called it but it had 18 head bolts instead of 20 and it was with out piston coolers. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/52209-end673c-engine/#findComment-389671 Share on other sites More sharing options...
Question
Srays
I have a 1964 Mack B61SX dump truck with the END673c engine. Does anyone know what the "c"
designation means? I can't find any information about this.
Thanks everyone for your great input!
Edited by SraysLink to comment
https://www.bigmacktrucks.com/topic/52209-end673c-engine/Share on other sites
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