ChrisMinelli Posted August 2, 2021 Report Share Posted August 2, 2021 Hello, I picked up a $15 Carter BBS off a 65 Dodge Slant 6 from a junkyard today. My intention was to “practice” rebuilding it before I rebuilt some flathead six Carter BB1s I found from the same yard. All is well except for the throttle body. It is quite corroded (I think the steel / aluminum combo over time caused some problems) and the throttle is stuck open. The idle adjusting screw broke off when I tried to back it out. Is there anything I can do besides brute force? (That won’t end well). Heat? A chemical? Keep going with my ultrasonic bath and see if that helps? I know the idle screw’s tolerances are precise and I don’t want to drill it out without loosening it up first. The carb is practice, but I want to do it right and fix it correctly so I have skills in my pocket for rebuilding my “real” carbs. Thanks! Quote Link to comment Share on other sites More sharing options...
allbizz49 Posted August 2, 2021 Report Share Posted August 2, 2021 PB Blaster and heat. 1 Quote Link to comment Share on other sites More sharing options...
joecoozie Posted August 2, 2021 Report Share Posted August 2, 2021 8 hours ago, allbizz49 said: PB Blaster and heat. Yep !!! Quote Link to comment Share on other sites More sharing options...
Robert5 Posted August 2, 2021 Report Share Posted August 2, 2021 (edited) What allbizz49 said is the answer and throw in a bit of patience. Chris, I love the idea of you practising on this one to hone your skills. Excellent idea! Let's us know how it goes as you continue. Edited August 2, 2021 by Robert5 Quote Link to comment Share on other sites More sharing options...
kencombs Posted August 2, 2021 Report Share Posted August 2, 2021 Pick up a qt of Evap-o-rust. That should be enough to cover that piece in a small container. It'll probably take a 12 hour soak but all the rust will be gone. I'm currently giving all the bolts from the front clip of my 56 PU that treatment. A qt is 10 bucks at my local stores. If you contemplate more such adventures, a gallon is cheaper by the ounce, about 30 buck. Quote Link to comment Share on other sites More sharing options...
Sniper Posted August 3, 2021 Report Share Posted August 3, 2021 Brake fluid freed up my stuck valves. No idea how it would work on aluminum though. Quote Link to comment Share on other sites More sharing options...
Solution ChrisMinelli Posted August 3, 2021 Author Solution Report Share Posted August 3, 2021 So good news and bad news. The heat + penetrating fluid worked like a charm! I don’t have a fancy welding torch but I do have a propane torch (like plumbers use) and that did the trick. The throttle is free! The bad news is I tried drilling out the stuck idle screw and I buggered up the hole. The aluminum was a lot softer than I thought and drilling hard steel stuck in soft aluminum was a bad idea. The carb will never function again, but I’m still going to rebuild it for fun and get some assembly skills down. 1 Quote Link to comment Share on other sites More sharing options...
Robert5 Posted August 3, 2021 Report Share Posted August 3, 2021 Valuable experience. You won't soon forget this. Quote Link to comment Share on other sites More sharing options...
48ply1stcar Posted August 4, 2021 Report Share Posted August 4, 2021 Mike's Carburetor video, https://www.carburetor-parts.com/ 1 Quote Link to comment Share on other sites More sharing options...
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