1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Rochester 2G Carb - Rebuild or get one rebuilt by a pro?

Discussion in 'Early CJ5 and CJ6 Tech' started by maurywhurt, Jan 5, 2010.

  1. Jan 5, 2010
    maurywhurt

    maurywhurt Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Western North...
    Joined:
    Dec 12, 2009
    Messages:
    873
    I'm trying to decide whether to rebuild my Dauntless 225's original carb or buy one that has been professionally rebuilt. My '67 CJ5 has the original carb and 80K miles on it.

    How difficult are these carburetors to rebuild? If they're not too bad - and if there aren't parts/bushings in them that typically wear out and require machining - from whom are the best rebuild kits available?

    If they're difficult to rebuild properly, does anyone happen to know who sells the best rebuilt Rochester 2G's?

    Thanks very much for any and all advice!
     
    Last edited: Jan 5, 2010
  2. Jan 5, 2010
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Easy to do. Search the forum, we've said that 100s of time I'm sure.

    Part numbers, rebuild kits, tips, etc. are all here. If you run into something come back and ask. :)
     
  3. Jan 5, 2010
    kaiser_willys

    kaiser_willys Well-Known Member

    Joined:
    Jan 7, 2007
    Messages:
    1,524
    from my past experience you are $ ahead to build your own. the rebuilt ones i have gotten are junk and cost alot
     
  4. Jan 5, 2010
    Chris Insull

    Chris Insull All roads lead me back to the beach... 2023 Sponsor 2022 Sponsor

    Chesapeake, VA.
    Joined:
    Sep 22, 2002
    Messages:
    805
    Easy to do, don't be scared off by the exploded view diagram! Lay the old parts out orderly at one side of your working surface and lay the new parts out orderly on the other. Clean what you're reusing well, using pipe cleaner and soft brushes as required. Blow out all orifices with air before reassembly. Fairly simple carb to work on... Fun job! Minus the cleaning, I did mine on a cookie sheet at the kitchen table!!:)
     
  5. Jan 5, 2010
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,360
    Rebuild it. There's hardly any parts in these...
     
  6. Jan 5, 2010
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    I worked in a parts store for many years, and we specialized in rebuilts - carbs, starters, alternators, etc. We had an arrangement with a local rebuilder who supplied our carburetors. We also sold Tomco brand carbs - a "name brand" rebuilt carb. The Tomco carbs were pretty good, but the generic carbs were so-so.

    Here's some background, assuming you want to have your carb rebuilt rather than rebuilding it yourself.

    A volume carb rebuilder takes in carb cores and breaks them down into individual components. Rebuilt carbs are then assembled from stock as needed. The main objective of a volume carb rebuilder is to cover as many applications with as few different part numbers as possible. So, when you turn in your core, you will get a "best fit" to your application from the rebuilder's offerings.

    With old and scarce carbs, the rebuilder will not sell you a carb without a core in exchange. DO NOT turn in your core (your old carb) until you have the replacement carb installed on your Jeep and it is functioning properly. If the rebuilder will not sell you a carb without a core, pass them by. It's just too risky IMO to hand over your core before the replacement is demonstrated to be working well and have all the fittings and features you will need to make your engine run properly.

    If you want to have someone rebuild your carb, I suggest you find a rebuilder who will rebuild your carburetor to factory specs. They are out there ... do a Google search for a shop in your area, or chose a reputable online rebuilder (The Carburetor Shop, Pony Carburetors, likely others - look for someone that caters to classic car owners).

    The main problem with old carburetors is wear in the carb body around the butterfly shaft (aka throttle shaft). If worn, a carb will leak air around the pivots and the carburetion will not be stable. A rebuilder can fix this by either installing bushings in the carb body or fitting an oversize shaft and reaming the body to fit. If your carb needs such repairs, a rebuilder can handle it ... not something you can do easily. However, a rebuild that replaces all the soft parts and gaskets in the carburetor is well within the average mechanic's abilities. Just go slow, be careful and take good notes.

    Also, if your carb has a tag, NEVER turn in the tag with the core. Keep your core until you are happy with the new carb, and keep your tag indefinitely. If you turn in a carb with a tag, it's gone, and you've lost the best source of info about which carb your engine needs.

    hth!
     
    ppJooce likes this.
  7. Jan 5, 2010
    ExpressEN1

    ExpressEN1 Member

    Central Arkansas
    Joined:
    Jan 20, 2007
    Messages:
    98
    Search the forums and you will find all the help you need. The people here are the greatest. If you put all the knowledge from this forum into a book, you wouldn't be able to lift it. Searching is part of the challenge of owning a relic.
    Here is a freebie for you. Just to get you started.
    :v6:
    http://www.v8buick.com/showthread.php?t=86177
     
  8. Jan 5, 2010
    davistroy

    davistroy Grasshopper

    Marietta, GA
    Joined:
    Jul 30, 2009
    Messages:
    432
    Rebuild will cost you less than $50 (rebuild kit + carb cleaner + shop towels + gloves), plus you will learn something. Here is another step-by-step guide (may have to register to see the pictures):

    http://www.v8buick.com/showthread.php?t=86177

    Prof. rebuild will cost you $100+

    If you want to get a professional rebuild, talk to this guy:
    Charlie Price - 772-778-0809
     
  9. Jan 7, 2010
    joe28

    joe28 Member

    North Eastern Pa.
    Joined:
    Oct 21, 2009
    Messages:
    170
    Hardest part about rebuilding a carb?
    Counting the mixture screws turns out!:)
    Get a clean surface, SLOWLY take it apart, laying everything out in order.
    Check your float height, set the new one to specs
    Take a can of spray cleaner and check EVERY passage way to make sure it clean.
    Years ago when I was in Trade school to be a tech., my instructor had us take EVERY brand of carb apart, we had to show him how the gas got to the engine, through each circuit.
    It was great, you really learn a lot that way.
    You can do the same.
    Good luck and have doing it!
    Joe
    Tools? I don't need no stinkin' tools! I got a jeep! Hand me that rock and that rusty beer can over in the weeds. I gotta rebuild the transfercase!:)
     
    Last edited: Jan 7, 2010
  10. Jan 7, 2010
    Tom in RI

    Tom in RI Member

    Rhode Island
    Joined:
    Aug 1, 2008
    Messages:
    234
    Like they said...rebuild it yourself.
    But just in case you can't for whatever reason - DO NOT buy a carb. Have yours rebuilt by someone who will take yours, rework it and return yours.
    When talking to them make sure they test run the carb as part of the rebuilding service.
    Unless you are going to show your jeep at pebble beach you can skip the recoloring and replating part of the rebuild and save a bunch of money.
    Tom
     
  11. Jan 7, 2010
    Wmi68CJ5

    Wmi68CJ5 Let the Sun Shine!

    Twin Lake MI
    Joined:
    Aug 10, 2006
    Messages:
    739
    If you do the rebuild yourself get a new float. That was the only problem I had and it was a bugger. Save yourself the headache and go for the brass float.
     
  12. Jan 8, 2010
    barlow

    barlow New Member

    Joined:
    Jan 4, 2010
    Messages:
    3
    Picked up your thread and wondered how you made out as my 66cj has a Rochester single BBL which needs work. Were you able to find any carb diagrahams? Thanks
     
  13. Jan 9, 2010
    maurywhurt

    maurywhurt Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Western North...
    Joined:
    Dec 12, 2009
    Messages:
    873
    Thanks so much for all the great advice, help, and encouragement! I've ordered the carb rebuild kit and a new brass float from NAPA. Interestingly, the float was not shown in NAPA's catalog under 225 V6 CJ carb parts, but was available for the slightly earlier 225 Buick that also used the Rochester 2G.

    Will do another post as to how the rebuild goes once I've been able to get to it. Thanks again!
     
    Last edited: Jan 9, 2010
  14. Jan 9, 2010
    NoFlyZone

    NoFlyZone Member

    Ridgeville, SC
    Joined:
    Mar 17, 2006
    Messages:
    578
    SAFETY GLASSES or GOGGLES

    Like everybody said unless the throttle shaft is sloppy, rebuild it yourself
     
New Posts