flynlow8740 Posted February 18, 2015 Share Posted February 18, 2015 I pulled the radiator out of my B-42 today and was surprised to find that the shutters are stationary. I had just assumed it had some parts missing as I've never really paid attention to it. I thought all the B models had shutters. My truck has lived in the South its whole life so is this a southern thing?Sent from my iPhone using Tapatalk Quote Using Tapatalk Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/ Share on other sites More sharing options...
Superdog Posted February 18, 2015 Share Posted February 18, 2015 I think it was more of a gas engine thing 1 Quote Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279616 Share on other sites More sharing options...
High Binder Posted February 18, 2015 Share Posted February 18, 2015 I don't know anything about Mack shutters and I'm probably wrong but I think they are supposed to move. Second picture, bottom left, shows a slot where the end of the shutter is supposed to rotate. All of the shutters should be hooked together. I also think you are missing parts. Besides that, why would they be there if they didn't rotate. Quote Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279623 Share on other sites More sharing options...
Superdog Posted February 18, 2015 Share Posted February 18, 2015 I don't know anything about Mack shutters and I'm probably wrong but I think they are supposed to move. Second picture, bottom left, shows a slot where the end of the shutter is supposed to rotate. All of the shutters should be hooked together. I also think you are missing parts. Besides that, why would they be there if they didn't rotate.no,those a "dummy" shutters,hes not missing anything. I've got a set or 2 just like them off B42's also. Quote Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279632 Share on other sites More sharing options...
HarryS Posted February 19, 2015 Share Posted February 19, 2015 My B 61 was sold new in Atlanta, Ga and it has shutters but no thermostat. Quote Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279650 Share on other sites More sharing options...
thomastractorsvc Posted February 19, 2015 Share Posted February 19, 2015 The shutters on the early diesel B's did not have a thermostat they used the shutter and shutter stat as the thermostat to regulate temp of the engine. When cold shutters would be cold as it warmed up they would open to a certain point to maintain temp in accordance with the shutter stat that was mounted in the return manifold on the left side of the engine. I would think that all changed when they went to the P, 711 or added a turbo. I have not researched it enough to determine the exact date when the thermostats became a part of the coolant system, but looking at engines was sometime in 1960 early 1961. Correct me if i am wrong someone. Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279692 Share on other sites More sharing options...
Maddog13407 Posted February 19, 2015 Share Posted February 19, 2015 yup most flathead gas jobs, B20, B30 and B42's had the fixed shutters,. the real shutter were an option. all B61's had shutters til they came out with the P motor and changed then intake/water manifold. I think this was around 59. only other oddball was the B53's that had no shutters period and a fixed grille 1 Quote Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279695 Share on other sites More sharing options...
yarnall Posted February 19, 2015 Share Posted February 19, 2015 All our our B models have fixed shutters: B42, B422, B66, B70, B85F. These are all gas jobs. I can't speak for the diesels. We don't have any of them. My father took the shutters off his B66 and replaced them with a fixed grill. I like the shutters better. Mike. Quote Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279701 Share on other sites More sharing options...
flynlow8740 Posted February 19, 2015 Author Share Posted February 19, 2015 Thank you for the replies. I really don't know much about these. It just struck me as odd. Are there many gas jobs left? I don't see much about them, though most of what I know comes from here or elsewhere on the Internet. Sent from my iPad using Tapatalk Quote Using Tapatalk Link to comment https://www.bigmacktrucks.com/topic/38982-dumb-question/#findComment-279702 Share on other sites More sharing options...
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