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Thread: weber frozen butterflies

  1. #1
    Senior Member bob joyce's Avatar
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    weber frozen butterflies

    is there a special treatment to free up the shafts on weber 40
    they have been soaked in pb blaster and corrosion x for a long time and no movement.

  2. #2
    Senior Member Scott A's Avatar
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    Maybe try a little heat

    Current long term ownership: 63 Cab, 71 911, 74 914

  3. #3
    Sorry to say this but shafts may have corrosion that pretty much locks them in the bearings. I have removed quite a few that required cutting and milling to remove the accessible shafts and throttle valves followed by driving the shaft remnants out of the bearings.
    Paul Abbott
    Early S Member #18
    Weber service specialist
    www.PerformanceOriented.com
    info@PerformanceOriented.com
    530.520.5816

  4. #4
    Senior Member bob joyce's Avatar
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    thanks for the reply's
    I expected the worst due to siting in a field for 40 years and water marks in air box and "white" fluffy electrolysis deposits
    one carb is way beyond saving and the other i bielieve falls into your worst case example
    I will just keep moving forward
    May I ask you opinion on the Spanish Weber IDA that are very available.
    You may respond by private message if that is suitable.
    thank you
    bob

  5. #5
    Webers with seized shafts and white corrosion are best left alone unless they are matched to a chassis of historic significance.

    A customer send a new set of Spanish 46IDA3C Webers for me to disassemble, rebuild & test run. I was surprised by how nice they were. I now refer those seeking Webers for a project to buy the Spanish Webers since they are good quality and cost effective compared to buying used Webers and having a service provider re-manufacture them. I posted my observations in another thread on this site.

    I have also heard from a handful of service providers I trust that have been pleased with the new Webers.

    The Spanish 46IDA3Cs were copied from the earliest version with a progression pattern developed for the Carrera 6, 2-liter engines with 42mm main venturis. Later 46s revised the progression pattern to be a bit more suitable for less highly strung engines.

    My understanding is if you buy from Pierce Manifolds they will re-jet the Webers to your specifications, otherwise you get generic jetting which is most likely inappropriate for your engine.
    Paul Abbott
    Early S Member #18
    Weber service specialist
    www.PerformanceOriented.com
    info@PerformanceOriented.com
    530.520.5816

  6. #6
    Senior Member bob joyce's Avatar
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    Thank You for your reply
    Great referral to Pierce in Hollister I have known of him but now I will focus on his service.
    It would be nice to have that solution
    50 years ago there was a guy in Novato The 914 Shop that did my solex for my 911 and they were so simple to dial in and ran perfectly.
    I would not mind having that kind of an experience again
    thank you
    bob

  7. #7
    Senior Member bob joyce's Avatar
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    arrived today from Hollister.Name:  DSCN1652.jpg
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