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Technical Need help with Carb

Discussion in 'Traditional Customs' started by 53kemper, Mar 24, 2014.

  1. 53kemper
    Joined: Dec 14, 2009
    Posts: 126

    53kemper
    Member

    I have a 55 Buick with a 264 in it. 2 Barrel carb. Got it running but it makes a loud sucking noise through a black inlet on the side of the carb. These pictures show a carb with something on the end covering up the inlet. Does anyone know what this is? Mine is missing.

    Thanks for the help
     

    Attached Files:

  2. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    I think that runs you off the map of normal carb problems...it is a switch relating to Buick's rather unusual starter system. For now, the need is to find where things thread into the iron and find a plug that fits the threads.
     
  3. 53kemper
    Joined: Dec 14, 2009
    Posts: 126

    53kemper
    Member

    So as long as I plug it there shouldn't be an issue?

    Thanks
     
  4. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    Find hole, look for threads, if you are lucky it will be something easy like 1/8 pipe. It is a vacuum operated switch which now is just a vacuum leak...your vacuum is getting out and roaming around looking for its switch and must be stopped and put back to work in your engine.
     

  5. 53kemper
    Joined: Dec 14, 2009
    Posts: 126

    53kemper
    Member

  6. Atwater Mike
    Joined: May 31, 2002
    Posts: 10,707

    Atwater Mike
    ALLIANCE MEMBER

    As Bruce says! Don't let all the vacuum out. That'd suck.
     
  7. BootleggerMatt
    Joined: Aug 17, 2011
    Posts: 258

    BootleggerMatt
    Member

    My freinds Packard has a similar solenoid, but not built into the carb... its connected by the linkage. It holds the throttle open just a little bit while cranking to help it start. Pretty cool trick, but obviously not worth the effort since they went away.
     
  8. BJR
    Joined: Mar 11, 2005
    Posts: 7,152

    BJR
    Member

    That is the the gas pedal starter switch. Step on the gas with the key on and the engine cranks and starts. When it starts and makes vacuum, the vacuum pulls up a ball and breaks the starter solenoid circuit. The generator is also involved. If your car starts with just the key someone has bypassed it, so plugging the hole should work. Maybe use a tapered rubber plug.
     
  9. BootleggerMatt
    Joined: Aug 17, 2011
    Posts: 258

    BootleggerMatt
    Member

  10. Now that is a novel idea.........step on the gas to start the engine....who'd ever "thunk" of that!
     
  11. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    It was fairly complicated...it had to be able to know if the engine was already running and to turn the starter off when the engine caught.
     
  12. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 9,474

    Johnny Gee
    Member
    from Downey, Ca

    Crazy stuff. One word, KISS
     
  13. Mr48chev
    Joined: Dec 28, 2007
    Posts: 30,049

    Mr48chev
    ALLIANCE MEMBER

    Actually it was considered pretty simple at the time. Hop in car, turn switch on, floor gas pedal, start car and the vacuum from the intake pulled the ball back to break contact in the start switch. Most of us were good enough at telling that the engine had started that we had already lifted off the gas a bit anyhow.
     
  14. 53kemper
    Joined: Dec 14, 2009
    Posts: 126

    53kemper
    Member

  15. carbking
    Joined: Dec 20, 2008
    Posts: 3,161

    carbking
    Member

    The hole covered by the switch is not threaded. The switch is held in place by a U-shaped spring and a single screw. Just rob a switch from an old Buick or Packard carburetor, with the spring and screw.

    There is an air passage underneath. It may be necessary to install the ball and plunger assembly to stop the vacuum leak underneath.

    Jon.
     
  16. BJR
    Joined: Mar 11, 2005
    Posts: 7,152

    BJR
    Member

    Go to your local hardware store and look at their assortment of tapered rubber plugs or stoppers. I bet they have a small one that will fit the hole. And if you ever want to put the switch back on, just pull the rubber plug and you are good to go.
     
  17. 53kemper
    Joined: Dec 14, 2009
    Posts: 126

    53kemper
    Member

    Decided to go with JB weld. Worked like a champ. Thanks everyone for the help
     

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