Guest Gene P Posted January 16, 2013 Share Posted January 16, 2013 I rebuilt the carburetor on a 1938 Century I recently acquired, assuming it was the original item. It starts well and seems to perform well with very limited driving to date. However, while the throttle connects correctly and operates well, I am thinking now that it is not the correct unit. It does not have any provision to connect the manual throttle cable and the control arm does not extend down to contact the temp control in the intake manifold. It is a Stromberg with "AAV 267" on the base. What do I have? This is my first Buick so I'm not as familiar as I should be.Also, after running, I get a slight leakage from the manifold discharge tube for several days. Is this an internal leak-down problem from the rebuild?'appreciate any information.Thanks, Gene P Link to comment Share on other sites More sharing options...
FLYER15015 Posted January 17, 2013 Share Posted January 17, 2013 Gene,Welcome to the Buick forum, and congrat's on your purchase. WE LIKE PICTURES>>>>>>>>>>You need to pick up a shop manual AND a parts book for your Buick as soon as possible. They are a very good investment and will serve you well. Both are reasonably priced as reprints.Jolly John made me buy them, and I'll be forever greatfull. Don't let him know I said that.Regarding your leak from the manifold tube, they all do to some degree, and I mean a drop or two. Anything more means the float is not adjusted properly, or the float pin is worn and letting expanded gas in the line enter the float bowl and overflow down the carb throat, and out the tube.Mike in Colorado Link to comment Share on other sites More sharing options...
Guest Gene P Posted January 22, 2013 Share Posted January 22, 2013 Mike,I have the parts book and the shop manual but they don't seem to address what I have. I thought perhaps someone on this forum might recognize, from my probably poor description, what my problem was. It doesn't negatively effect the operation, but obviously something isn't as it should be.Thanks for the response,Gene Link to comment Share on other sites More sharing options...
danhar1960 Posted January 22, 2013 Share Posted January 22, 2013 Gene,I think you'll find that the carb you have is from a '48-49 series 70. It is similar but is not original to the '38. I'm not up on late '40s so I don't know if they still used the hand throttle by then. The auto choke system is very different also. How is the auto choke currently connected ??Mate "a picture is worth a thousand words". If you can't post it, email it to one of us here and we'll post it for you.You'll be sure to get conformation for sure then.Danny Link to comment Share on other sites More sharing options...
FLYER15015 Posted January 22, 2013 Share Posted January 22, 2013 Gene,One thing you might check is your gas cap. Is it vented ? These old cars are not meant to run a pressurized system, and they do not have a gas tank vent along side the filler tube. If yours is "sealed" then the expansion in the tank and lines has no place to go except pushing it into the carb float bowl and to the vent in the manifold chamber under the carb.Years ago we used to drill a 1/16" hole in our gas caps, just to let the tank breathe a bit.Mike in Colorado Link to comment Share on other sites More sharing options...
DonMicheletti Posted January 22, 2013 Share Posted January 22, 2013 For what it is worth, here is a photo of the throttle arm, link and hand throttle connection on my '38 Roadmaster, the Century is the same. Link to comment Share on other sites More sharing options...
carbking Posted January 22, 2013 Share Posted January 22, 2013 This link might explain the leak after shutdown:THE CARBURETOR SHOP / TroubleshootingStromberg carburetors have the identification number STAMPED (NOT raised) into the airhorn or bowl cover (top casting) of the carburetor. Look straight down on the top of the airhorn along one of the sides. The number will be in the format ccc/nnn/e where ccc is a 1, 2, or 3 digit number representing the company (7= Buick); nnn is a 1, 2, or 3 digit number representing the number beginning with 1 of the different carburetors Stromberg sold to this company; e is a letter that may or may not be present representing the "engineering change level" of this unit (A = 1 engineering change, B = 2 engineering changes, etc.). Once you have the number, and assuming it is a Buick carb, try one or the other of these links to positively identify the unit:THE CARBURETOR SHOP / BUICK KITS 1904 - 1939THE CARBURETOR SHOP / BUICK KITS 1940 - 1964Jon. Link to comment Share on other sites More sharing options...
jenz38 Posted January 22, 2013 Share Posted January 22, 2013 (edited) Hi Gene,you have Pics from your car and your Carb ? what'a Body and in witch condition you have?Here i'm never have seen a Prewar Century.Good Luck and many Fun with your Car Edited January 22, 2013 by jenz38 (see edit history) Link to comment Share on other sites More sharing options...
Guest Gene P Posted January 23, 2013 Share Posted January 23, 2013 Don, Thanks for the photo. That's what I had decided mine should look like, but doesn't! I took some pictures but didn't know how to post them so I'm hoping to send them to Danhar1960 who graciously offered to post them for me. I believe the responses to my question indicate my carb is actually from a 1948-49 series 70. Helpful responses, Thanks, Gene Link to comment Share on other sites More sharing options...
danhar1960 Posted January 23, 2013 Share Posted January 23, 2013 Some pics from Gene of the beast in question. And the carb there from : It is definitely not original to a '38 but it will probably perform better and be more reliable than the original.The manifold appears to be correct for a '38. Link to comment Share on other sites More sharing options...
carbking Posted January 24, 2013 Share Posted January 24, 2013 Nice looking car!Gene - if you wanted to add some "color", the zinc alloy body (the part covering the glass bowl) of the Carter fuel filter was originally painted red. It is the only part that was painted. All of the steel parts were electroplated with white zinc. The splash of red does add some color.Jon. Link to comment Share on other sites More sharing options...
Guest Gene P Posted January 24, 2013 Share Posted January 24, 2013 Thanks for the suggestion Jon,Does the "color" also apply to the "clamp" mech or only the top of the bowl cover?Gene Link to comment Share on other sites More sharing options...
carbking Posted January 25, 2013 Share Posted January 25, 2013 Gene - only the zinc alloy bowl cover. All of the steel pieces were electroplated with white zinc.Jon. Link to comment Share on other sites More sharing options...
Guest Gene P Posted January 26, 2013 Share Posted January 26, 2013 Thanks Jon, I'll work on that!Gene Link to comment Share on other sites More sharing options...
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