james j neiweem Posted June 9, 2022 Share Posted June 9, 2022 What is the difference between a B-42 and a B-421. Was the EN-540 flathead the most popular engine? 🙂 Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/ Share on other sites More sharing options...
terry Posted June 9, 2022 Share Posted June 9, 2022 I've often wonered this , i had a B421 dump truck for a couple of years, long time ago, my first dump truck, lots of shifting with that baby quad!  terry Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499741 Share on other sites More sharing options...
67RModel Posted June 9, 2022 Share Posted June 9, 2022 Was a B421 diesel? I was always told with B model nomenclature that model numbers ending with an odd number were diesel, and model numbers ending with an even number were gas.....it holds true for everything I've seen but I havent seen much and I don't know a whole lot about B's 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499748 Share on other sites More sharing options...
terry Posted June 9, 2022 Share Posted June 9, 2022 5 minutes ago, 67RModel said: Was a B421 diesel? I was always told with B model nomenclature that model numbers ending with an odd number were diesel, and model numbers ending with an even number were gas.....it holds true for everything I've seen but I havent seen much and I don't know a whole lot about B's B421 was a flathead gasser, very gutless! Â Terry Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499750 Share on other sites More sharing options...
mattb73lt Posted June 9, 2022 Share Posted June 9, 2022 B42 had a EN 401/402 @ 150 HP. Minor differences and I believe an extra head stud. The B421 I thought was an overhead valve EN438. There’s also the B422. There’s a factory chart around the lines up the difference models and engines, just can’t put my hands on it. Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499768 Share on other sites More sharing options...
mattb73lt Posted June 9, 2022 Share Posted June 9, 2022 Also, Magnadyne was the flathead and the Thermodyne was the overhead valve. Run some google searches, tons come up from this site, ATHS and others. There's an answer in there somewhere, I just haven't looked at that stuff in years since switching to diesels. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499770 Share on other sites More sharing options...
terry Posted June 10, 2022 Share Posted June 10, 2022 3 hours ago, mattb73lt said: B42 had a EN 401/402 @ 150 HP. Minor differences and I believe an extra head stud. The B421 I thought was an overhead valve EN438. There’s also the B422. There’s a factory chart around the lines up the difference models and engines, just can’t put my hands on it. I had paper work on that B421 from new and it had the flathead.  terry Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499790 Share on other sites More sharing options...
mattb73lt Posted June 10, 2022 Share Posted June 10, 2022 1 minute ago, terry said: I had paper work on that B421 from new and it had the flathead.  terry I'm probably off. From what I saw in a quick search I did, the 421 was a "cheap" version of the 42. No oil cooler and several other things deleted. I think I was mixing it up with the 422, which did have an overhead valve engine. There was a site from where the B model registry came from that had a lot of engine and transmission reference material from Mack posted on it. I can't seem to find it, so it may be gone. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499791 Share on other sites More sharing options...
mowerman Posted June 10, 2022 Share Posted June 10, 2022 There was a comedy movie in the early 70s when a young kid was driving a Mack gas job I think it was a strait job flatbed it didn’t even have air brakes I can’t remember it I’m sure one of you fellas can bob Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499822 Share on other sites More sharing options...
tjc transport Posted June 10, 2022 Share Posted June 10, 2022 Police academy Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499829 Share on other sites More sharing options...
doubleclutchinweasel Posted June 10, 2022 Share Posted June 10, 2022 Maybe these will help a little. Â 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499832 Share on other sites More sharing options...
james j neiweem Posted June 10, 2022 Author Share Posted June 10, 2022 There was an EN-540 I believe. I am not sure if this was a big seller and what the specs were. Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499836 Share on other sites More sharing options...
doubleclutchinweasel Posted June 10, 2022 Share Posted June 10, 2022 2 hours ago, james j neiweem said: There was an EN-540 I believe. I am not sure if this was a big seller and what the specs were. Wasn't the EN-540 the 185 HP (or thereabouts) version used in the B60 series??? Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499844 Share on other sites More sharing options...
doubleclutchinweasel Posted June 10, 2022 Share Posted June 10, 2022 Yarnall might know! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-499845 Share on other sites More sharing options...
mowerman Posted June 12, 2022 Share Posted June 12, 2022 On 6/10/2022 at 5:35 AM, tjc transport said: Police academy You are the man I actually saw it when I was brand-new with the drive-in movies I couldn’t remember the name of it thanks for that …. Bob Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-500065 Share on other sites More sharing options...
tjc transport Posted June 12, 2022 Share Posted June 12, 2022 and to one up the movie title, it was a 60 B-61. owned by Teskey concrete in Toronto Canada Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-500068 Share on other sites More sharing options...
mowerman Posted June 16, 2022 Share Posted June 16, 2022 Oh wait a minute I thought it was a gas job with hydraulic brakes I remember the guy slamming on on the brakes and there wasn’t any air noise bob Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-500353 Share on other sites More sharing options...
mowerman Posted June 16, 2022 Share Posted June 16, 2022 It was a little flatbed correct?????? Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-500354 Share on other sites More sharing options...
mowerman Posted June 16, 2022 Share Posted June 16, 2022 As I mentioned I only saw it once and it was one it was brand new long long time ago bob Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-500355 Share on other sites More sharing options...
yarnall Posted June 17, 2022 Share Posted June 17, 2022 On 6/9/2022 at 9:38 PM, mattb73lt said: I'm probably off. From what I saw in a quick search I did, the 421 was a "cheap" version of the 42. No oil cooler and several other things deleted. I think I was mixing it up with the 422, which did have an overhead valve engine. There was a site from where the B model registry came from that had a lot of engine and transmission reference material from Mack posted on it. I can't seem to find it, so it may be gone. 422 has an over head value Thermodyne.  I think an EN 460.  Mike. Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-500433 Share on other sites More sharing options...
mowerman Posted June 19, 2022 Share Posted June 19, 2022 On 6/10/2022 at 5:35 AM, tjc transport said: Police academy Google has photos of it under police academy Mack truck… bob Quote Link to comment https://www.bigmacktrucks.com/topic/69925-b-42/#findComment-500672 Share on other sites More sharing options...
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