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Thread: buick 225 v6 carb

  1. #1
    Join Date
    Jul 2010
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    Cromberg Calif
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    Default buick 225 v6 carb

    I have a 1971 cj5 with a Buick 225 v6. The carb is a rochester 2g, the id on the side of the carb designates it as a v8 model. Does anybody know if this is the stock carb if so what is the original jet size?
    Thank you

  2. #2
    Join Date
    Aug 2006
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    St. Charles, Missouri
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    Default Re: buick 225 v6 carb

    Seems like you have the wrong carburetor.
    Correct Rochester 2 GC numbers for Dauntless 225 are not the same as for other GM applications.
    What number 2GC you currently running ?
    Was your 1971 originally equipped with an air pump ?
    Ken Bushdiecker
    1953 TRANS-VINTAGE CJ-3B Second full rebuild using only the best from all 3B vintages.
    1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
    Currently serving as my one and only DAILY DRIVER

  3. #3
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    Nov 2002
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    everett wa.
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    Default Re: buick 225 v6 carb

    The number on the carb should read 7041185

  4. #4
    Join Date
    Feb 2008
    Location
    Estherville IA
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    263

    Default Re: buick 225 v6 carb

    If you have the carb. no. I might be able to give the part no.'s.And app's.
    Last edited by dan d; 07-29-2010 at 09:21 PM.
    1968 cj5-225-t86-d18-d27-d44

    "There is a difference between having an interest and being totally committed. When you sit down for breakfast and have eggs and bacon, that chicken had an interest, but that hog was totally committed" Junior Johnson.

  5. #5
    Join Date
    Oct 2008
    Location
    West Valley City, UT
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    189

    Default Re: buick 225 v6 carb

    I robbed a 2g off an early 60's Chevrolet v8 from the junkyard, and after rebuilding it i'm getting 16mpg city out of it in my 62 CJ5 with stock drivetrain. Seems to work okay to me, if all you can find is one off a v8, run it!

  6. #6
    Join Date
    Jan 2003
    Location
    SHERIDAN, WY
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    251

    Default Re: buick 225 v6 carb

    Original jets for the 7041185-137-1-1 were:
    Sea level to 5000ft. .051
    5000ft. to 10,000 .049
    Over 10,000ft. .047
    Wyomike 71 RENEGADE II
    ORIGINAL OWNER
    F-2/7

  7. #7
    Join Date
    Jul 2010
    Location
    Cromberg Calif
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    Default Re: buick 225 v6 carb

    The number is 7029140 and yes it did run an air pump. Reason for post only getting 11 mpg

  8. #8
    Join Date
    Aug 2006
    Location
    St. Charles, Missouri
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    Default Re: buick 225 v6 carb

    7029140 belongs to a 1969 Buick 350.
    Using a carburetor thats internally calibrated for a larger discplacement engine can cause the smaller displacement engine to run excessively lean. As in burnt valves !
    Last edited by oldtime; 07-30-2010 at 05:22 PM.
    Ken Bushdiecker
    1953 TRANS-VINTAGE CJ-3B Second full rebuild using only the best from all 3B vintages.
    1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
    Currently serving as my one and only DAILY DRIVER

  9. #9
    Join Date
    Sep 2002
    Location
    Los Alamos, NM
    Posts
    7,314

    Default Re: buick 225 v6 carb

    Quote Originally Posted by oldtime View Post
    7029140 belongs to a 1969 Buick 350.
    Using a carburetor thats internally calibrated for a larger discplacement engine can cause the smaller displacement engine to run excessively lean. As in burnt valves !
    Huh. That's backwards from everything I've always known/ heard/ experienced.
    sent from my computer using hunt'n'peck


    CJ5 quitter, now I drive a TeeJ
    01 TJ Sport

    1967 CJ5 V6 (sold)
    1971 CJ5 283 (sold)
    1970 CJ5 V6 (sold)

  10. #10
    Join Date
    Feb 2008
    Location
    Estherville IA
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    263

    Default Re: buick 225 v6 carb

    Fwiw,
    I did some digging in my book, 7029140 is a 2GV, the 2GV is a auto choke model. However, a vac. break diaphragm unit(s) is used in place of the conventional choke HSG and choke piston. The thermostatic coil is located on the intake manifold and is connected to the choke valve by a linkage. The only 2GV listing in my book for a jeep is a 1968 Kaiser jeep 350 V8. Date of pub. Nov. 1971. I have the settings for that carb.#, but not the jet # 's.Sorry.
    1968 cj5-225-t86-d18-d27-d44

    "There is a difference between having an interest and being totally committed. When you sit down for breakfast and have eggs and bacon, that chicken had an interest, but that hog was totally committed" Junior Johnson.

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