Trouble identifying my quadrajet

Discussion in 'The Venerable Q-Jet' started by chaunceeb93, Feb 26, 2017.

  1. chaunceeb93

    chaunceeb93 Active Member

    Been reading cliffs book on quadrajets and I can't seem to identify mine based on some of the numbers making absolutely no sense in their placement I'll upload the pics of what I have found so far. It's on a 1974 Buick regal 455 all original so far as I know[​IMG][​IMG]

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  2. chaunceeb93

    chaunceeb93 Active Member

    The baseplate numbers are 7030784 and the stamped numbers on the housing are 7047931

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  3. chaunceeb93

    chaunceeb93 Active Member

    As always anyone's input is deeply appreciated

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  4. carmantx

    carmantx Never Surrender

    To identify your Quadrajet you need to get the 7 digit code from the driver side main body. Should be a 7043240 if it is a correct 74 455 carb.
    The stampings in the circles are casting numbers for those parts only. You have the base plate stamp and the main body stamp there in your pictures. You need the Quadrajet code number, which is in the picture attached.
     

    Attached Files:

  5. chaunceeb93

    chaunceeb93 Active Member

    Aha I found it the numbers are as follow 7044240 KA 2783. Thanks for the help the numbers were extremely faded

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  6. carmantx

    carmantx Never Surrender

    There you go.
    74 Buick 455 Quadrajet produced on 278th day of 1973.
    800 cfm, divorced choke.
    Great Quadrajet!
    Let me know if you need parts, or service!
     
  7. chaunceeb93

    chaunceeb93 Active Member

    Well I'm planning to rebuild it in the very near future so I'm going to start collecting parts and some very exact sized drill bits. I just read through Cliffs book cover to cover today and marked/highlighted anything relevant to my stock 455. Again this forum is an absolute wealth of information as well as good people always willing to help appreciate it guys

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  8. chaunceeb93

    chaunceeb93 Active Member

    Although I think timing is part of the equation for my stumble from part throttle to wot I still think that I should go through the carb and eliminate at the least any vacuum issues that could arise with 40+ year old gaskets

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  9. berigan

    berigan Well-Known Member

    chaunceeb93,

    You may have already thought of this/addressed this already, but whenever I hear of a bog issue, I always think of the vacuum break/choke pulloffs being shot.(guessing there are 2 on the passenger side of the Q-Jet) If you haven't, CAREFULLY remove the vacuum hoses off the nipple(they really don't want to come off after many years) or into the port to the carb. push the rod on the back of the break/pulloff in, then put your fingertip over the nipple/hose. Release the rod, and see if it holds in place, or "relaxes" back to where it was, if that makes sense. If the diaphragms are ruptured inside, that may be the cause of the problem you are experiencing...
     
  10. chaunceeb93

    chaunceeb93 Active Member

    Thank you I'll try that and see if it works I also got a new fuel filter although just throwing parts at a problem is never a solution I'm sure it wouldn't hurt

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  11. Cliff R

    Cliff R Well-Known Member

    "Although I think timing is part of the equation for my stumble from part throttle to wot I still think that I should go through the carb and eliminate at the least any vacuum issues that could arise with 40+ year old gaskets"

    LOTS of reasons you get a "stumble/hesitation/bog" going quickly to full throttle. Insufficient accl pump shot, worn secondary plastic cam, "tired" or out of adjustment secondary air door spring, primary choke pull-off too fast or too slow, linkage from the P/O to the secondaries out of adjustment, POE tubes fell out of air horn, etc, etc.

    I would start with a complete/correct rebuild, and also include the distributor. The old grease in the mechanical advance mechanism dries up and effects spark advance as well.....Cliff
     
  12. chaunceeb93

    chaunceeb93 Active Member

    Alright thank you cliff I remember reading a thread and you mentioned two different rebuild kits Mr. Gasket was one but if I remember correctly it was missing something. What would you recommend I order?

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  13. Cliff R

    Cliff R Well-Known Member

    If you are interested in parts, etc, contact the shop....tks....Cliff
     
  14. chaunceeb93

    chaunceeb93 Active Member

    Alright thank you sir I will

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  15. HotRodRivi

    HotRodRivi Tomahawks sighted overseas

    What's the shop contact info?
     
  16. lemmy-67

    lemmy-67 Platinum Level Contributor

    quadrajetparts.com

    Get ready to pull them idle tubes if they haven't already been replaced...
     

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