Popular Post mackaholic Posted June 8, 2022 Popular Post Share Posted June 8, 2022 Brought another old Mack home recently. 1931 BC, one of 10 consecutive trucks sold to California Dept of Transportation. Very complete but the engine is stuck. It is an original BC engine. Anyone have any info one those? CID? are they the samme as any of the other early Mack engines? Seems they changed engines with every truck back in the thirties. 7 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/ Share on other sites More sharing options...
fjh Posted June 8, 2022 Share Posted June 8, 2022 Nice Find Bro! Can't answer your question either ! But ! I always wondered why the up draft carb was invented and used so much! seemed back in the day up draft was the thing to do! Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499642 Share on other sites More sharing options...
mattb73lt Posted June 8, 2022 Share Posted June 8, 2022 Really cool early find!! Are you doing a full restoration or just a preservation? Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499645 Share on other sites More sharing options...
mowerman Posted June 9, 2022 Share Posted June 9, 2022 Excellent have a ball with it…engine stuck doesn’t necessarily mean you can’t free it with lots of mystery oil snd tapping on the pistons I’ve done it before good luck Bob Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499671 Share on other sites More sharing options...
mackaholic Posted June 10, 2022 Author Share Posted June 10, 2022 On 6/8/2022 at 2:26 PM, mattb73lt said: Really cool early find!! Are you doing a full restoration or just a preservation? At this point just a preservation. It is really complete so if we can get it running it should be drivable for parades, shows, etc. It is really beat up. A full restoration would be a lot of work! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499848 Share on other sites More sharing options...
mackaholic Posted June 10, 2022 Author Share Posted June 10, 2022 On 6/8/2022 at 7:59 PM, mowerman said: Excellent have a ball with it…engine stuck doesn’t necessarily mean you can’t free it with lots of mystery oil snd tapping on the pistons I’ve done it before good luck Bob We're working on that! Pan needs to come off as there are some rust holes in the bottom due to condensation(I hope). Oil looks good it it and not overfull. Fingers crossed. Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499849 Share on other sites More sharing options...
Popular Post doubleclutchinweasel Posted June 10, 2022 Popular Post Share Posted June 10, 2022 It's important to keep the bird's nest too! I think that one looks like a "Factory Original". 2 2 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499850 Share on other sites More sharing options...
67RModel Posted June 10, 2022 Share Posted June 10, 2022 Where the heck is this? California? Look at all those class 8 gems sitting there waiting for new homes.... Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499851 Share on other sites More sharing options...
mackaholic Posted June 10, 2022 Author Share Posted June 10, 2022 1 hour ago, 67RModel said: Where the heck is this? California? Look at all those class 8 gems sitting there waiting for new homes.... Gary Berrington's place in Nevada. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499857 Share on other sites More sharing options...
Vladislav Posted June 10, 2022 Share Posted June 10, 2022 Great find! A rare beast definitely. Congrats on the purchase! Speaking the engine I would pay attention to what firetruck guys have in their old Macks. 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499862 Share on other sites More sharing options...
Freightrain Posted June 10, 2022 Share Posted June 10, 2022 On 6/8/2022 at 4:24 PM, fjh said: Nice Find Bro! Can't answer your question either ! But ! I always wondered why the up draft carb was invented and used so much! seemed back in the day up draft was the thing to do! Ive wondered if that was not to keep fuel from overflowing and running into the engine? Something along those lines? 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499863 Share on other sites More sharing options...
Popular Post mrsmackpaul Posted June 10, 2022 Popular Post Share Posted June 10, 2022 Yes it is official, I am jealous 😘 So much classic stuff in the US compared to just about any other country including Australia I think the updraft carby was used because you cant flood them, fuel just runs oout onto the ground and not down into the motor literally flooding the entire motor until the tanks empty This technology of internal combustion engines was still really new, it wasnt until after WW2 that down draft carbys became normal and even then farm tractors and the like used updraft carbys well into the 60's Paul 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499865 Share on other sites More sharing options...
Popular Post 67RModel Posted June 11, 2022 Popular Post Share Posted June 11, 2022 (edited) Yea there is old iron literally laying around everywhere over here. Everybody’s garage or old barn has stuff sitting in it. If you take secondary and rural roads through just about anywhere in the States you will see stuff sitting everywhere. Kind of sad in some ways and kind of good in other ways I guess. Edited June 11, 2022 by 67RModel 3 Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499890 Share on other sites More sharing options...
Quickfarms Posted June 11, 2022 Share Posted June 11, 2022 3 hours ago, 67RModel said: Yea there is old iron literally laying around everywhere over here. Everybody’s garage or old barn has stuff sitting in it. If you take secondary and rural roads through just about anywhere in the States you will see stuff sitting everywhere. Kind of sad in some ways and kind of good in other ways I guess. Not everybody but there is quite a bit. The sad part is when it is left to rot into the ground Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-499920 Share on other sites More sharing options...
russell t Posted July 30, 2022 Share Posted July 30, 2022 I had occation to measure a bc engine looking for a cylinder head for a CF engine in a BM truck The head bolt pattern front to back measured the same but the BC engine was 1 inch nerrower measured across the block than the CF engine. The CF is a 414 CU" engine so my quess would be the BC would be aprox 350 CU".You are very fortunate to have a pristeen EX manifold. Up draft carbs were most likely used so as to have gravity fuel flow to the carb. All gas powered tractors had their tank above the engine and of cource the Model A ford with the tank in the dash. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69920-another-new-truck/#findComment-504760 Share on other sites More sharing options...
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