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2Buicks

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  • Birthday 12/10/1943

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  1. It may not be factory exact, but it clears the defroster hose and the ivory knob travel aligns with the on-off markings.
  2. Based on all the inputs from fellow Buick owners, I have my 1940 Buick Convertible fresh air vent working. On Saturday, I used a coat hanger to mock up a control linkage from the dash knob to the fresh air vent butterfly valve (on the firewall). It took several tries of modifying the coat hanger until I got the desired movement over the defroster/heater hoses under the dash. After I achieved the desired shape, I took an old door lock rod and repurposed it for my new control linkage. The installation turned out great and the vent control knob works like a charm. Included below are the pictures of the mock-up linkage and what the final installation looks like under the dash and on the firewall.
  3. Tinindan, I thank you for your comment, but I'm trying to determine if the wiring is correct for the accessory switches. The electrical wiring diagram I have for the 1940 Buick, does not show or list those three switches on any drawing in the 1940 Buick Shop Manual. If I use Neil's wiring for the 1941 Buick, it might tell me the wiring for my 1940 Buick is wired correctly. My next job is to check the wiring per Neil's drawings. I will let you know what I find. Don
  4. As I have stated in my other 1940 Buick threads, I recently purchased a 1940 Buick 46C convertible and I'm trying to better understand and appreciate this new Buick. My latest question pertains to the heater shutoff valve, mounted below the thermostat housing, that connects to a heater hose that feeds the heater/defroster lines at the firewall and then the under front seat heater. As shown in the picture above, my '40 Buick does not have a shutoff valve installed and I believe this is why it gets so freakin hot in the front seat when I take the car for a long drive. I agree with Walt G's comments (from the June 19th thread on the 1940 Buick Special Convertible sedan on NY Craigslist), that the 1940 Buick heaters are very efficient and if you don't control the hot water flow to them, they are like a furnace in the passenger compartment. Checking other '40 Buick threads, I found the following two pictures that show a flow control/shutoff valve at an outlet, below the thermostat housing, that feeds the two heaters cores. The question I have is do you close off all hot water to the heater cores, when you don't want any heat, or do you leave them open slightly? I believe it is closed completely but need clarification since I have not found any info on this subject. Brass replacement shutoff valve for $23.99 on eBay (https://www.ebay.com/itm/NORS-Brass-Manual-Heater-Control-Shut-Off-Valve-Possible-Use-1930s-1940s-Cars/283803158708?hash=item4213fc88b4:g:K2UAAOSwxkpdzeXK) I wish there was a control valve, that shuts off the hot water to the heaters, like I have on my 1952 Buick Super. Has anyone added a flow control valve similar to what Buick added in 1946, after the war? Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible Based on checking
  5. 2carb40, Thank you for the great pictures you provided. This will help me in making the brackets for my 40 Buick. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  6. 2carr40, Do you have another picture of the linkage rod and how long it is? From the picture, it looks like there is some kind of tape raped around it below the U shaped clamp and the end, at the top of the picture, is in a bag. I believe from the picture the right angled piece of the rod, in the left hand corner of the picture, is what connects to the butterfly valve and the end inside the bag (can't determine what its shape is) connects to ivory knob under the dash. Is this correct? Neil, Thank you for your information of how the vent air duct attaches up front. When I added the missing air vent duct to my 40 Buick, that is what I did was to shove it into the opening next to the radiator. The part I do not have is the U shaped clamp to hold the vent duct in place along with the two heater hoses. I will make that missing piece unless I can't find it on eBay. Ben, Thank you for clarifying what the two defroster ducts are. Based on your comment, I will leave on ebay for someone else to purchase. Matt, Thank you for your reply. Also, based on your 1940 Buick Super 56C Convertible link, I went and viewed all the pictures to see if I could gain any information on how the linkage was installed. That 1940 Buick Super you have listed is a beautiful car. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  7. Neil, Thank you for that information. That will help me in making possible changes to the wiring to correct the power drain to the battery. Don
  8. I recently purchased a 1940 Buick 46C convertible (see attached pictures). As part of some trouble shooting and to better understand and appreciate my new Buick, I'm trying to determine how the accessories should be electrically hooked up. The three accessories I want to know more about are the heater, defroster, instrument light switches under the driver's side of the dash (see picture below). I have checked the 1940 Buick Shop manual electrical diagram and it does not show these three switches on the drawing. What I am trying to determine is should the power to these three switches be on full time or should they receive power when the ignition switch is on? Currently, the switches have power when the ignition switch is off. I have drained my battery a couple of times when the switches were not in the off position. I prefer to connect the power to these three switches through the ignition switch, but need guidance on what other 1940 Buick owners know on this subject. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  9. All, Another question I have is what does the vent duct connect to in the front, next to the radiator? I found pictures of vent ducts on eBay and was wondering if this is what the flex hose connects in the front of the engine compartment.. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  10. Neil, Matt or other 1940 Buick owners, I recently purchased a 1940 Buick 46C convertible(see attached picture) and I'm trying to locate and replace missing parts. The part(s) I'm looking for now is the linkage from the control (under the dash) to the fresh air vent butterfly valve (on the firewall) shown in the 1st link. I have all the parts to control the valve except the linkage. Can Neil or Matt take pictures of what the linkage looks like under their dash and at the butterfly valve so I know how make a replacement linkage? I have searched for the linkage on the internet and have not found one to show me what it looks like and how long. I included the first picture on this thread plus pictures from my own 1940 Buick. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  11. Thank you Mike for the input and based on what you provided, the '37 Buick eBay part won't work on our 1940 Buick Convertible. With that resolved and the information you provided, my son (dual owner in the '40 Buick) built the following steel part that looks similar to your floor pan. See the three pictures below. I also want to thank Bloo for providing the part #. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  12. Mike, Do you have any pictures of your floor pan, near the brake and clutch pedals? My '40 Buick Special is missing the piece (see 1st picture below). Found a 1937 Buick floor panel on eBay that looks to match the cutout in my Buick's floor. Need to know if they are the same part number. Checking out "Cars" catalog shows the floor pans are the same part# for 1937-1940 Buick Specials. I have already reviewed "Daves1940Buick56s" thread on instruments and found several floor pan pictures from his 22 Jun 2014 thread to be helpful. Your or any other Buick owner's help is appreciated. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  13. Mike, What is that white tube, in the engine compartment, slopping downward from the firewall to the carburetor? Since my 1940 Buick does not have that, I was trying to determine what it was and its purpose. Don (2Buicks+1more)
  14. Mike, Thank you for the information. I need to do some research and checking to see if my carb has that linkage on it or the carb has been changed out. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
  15. Mike, Thank you for the information. I need to do some research and checking to see if my carb has that linkage on it or the carb has been changed out. Don (2Buicks+1more) 1969 Buick Riviera 1952 Buick Super 4dr 1940 Buick Special Convertible
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