Bmartin Posted January 28, 2016 Report Posted January 28, 2016 (edited) I have tow different Thermostat housings. The one on the right is the one off my 1940 which I believe to be original. The one on the left is off a head of unknown year(23"). The major difference is on the inside. Its almost as if the 40 is missing something inside. I need to use this on a 1948 block and am not sure which one to use. I ordered a thermostat for a 1940-1950 from Bernbaum, although it is not here yet Also her is a link to a 1940 which looks the same inside as mine. http://www.ebay.com/itm/like/262255020583?ul_noapp=true&chn=ps&lpid=82 I can't seem to find a pic of one for a 1948. Maybe it does not matter as long as I match thermostat to housing. I did order an external bypass water pump. Number stamped on the side of the unknown one is 640728....first number could be an 8 though. Any help is appreciated. Edited January 28, 2016 by Bmartin Quote
Don Coatney Posted January 28, 2016 Report Posted January 28, 2016 This is the thermostat that will work on your external bypass system. Available at NAPA. 1 Quote
Bmartin Posted January 28, 2016 Author Report Posted January 28, 2016 Thanks for the thermostat info. Any idea if I can use either housing with that thermostat? I'd prefer to use the unknown year housing as its in better shape. If I need to use the 1940, then I may pick up a better one. The unknown year housing looks like it has an extra piece inside that a gasket would sit against but the 1940 does not. Quote
Phil363 Posted January 28, 2016 Report Posted January 28, 2016 (edited) Thanks for the thermostat info. Any idea if I can use either housing with that thermostat? I'd prefer to use the unknown year housing as its in better shape. If I need to use the 1940, then I may pick up a better one. The unknown year housing looks like it has an extra piece inside that a gasket would sit against but the 1940 does not.Looking inside of the unknown year thermostat housing area I think it looks quite a bit different where the top gasket of the thermostat would be seated. You may find that the NAPA Thermostat THM 155 (180 degree) or THM 55 (160 degree) may not seat in there like your original thermostat housing. Your 1940 (???) housing looks very much like mine and either of the thermostats that Don mentioned above (and on some other posts I have read) should fit it. Mine looked worst than yours inside with a ton of build up of minerals from the coolant fluid. I lightly sandblasted it inside and out (5 minutes at 125 Lbs of air) and it was ready to be painted. I will get a good seal on both hose connections ... if you have heavy pitting that may be problematic to getting a good seal. The coin is still flipping in the air on whether I will go with the 160 degree or 180 degree thermostat ... Side note: the part number on my housing is 1116777 and below it looks like a B 3 stamped on it. Phil Edited February 10, 2016 by Phil363 Quote
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