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Thread: snorkel valve

  1. #1
    Join Date
    Mar 2017
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    Default snorkel valve

    Can anyone explain the purpose of the internal snorkel valve in the air cleaner system. I checked mine and the butterfly flap is movable but I do not see it open when the car gets hot. I know that it has a thermostat built into the snorkel but I wonder how it works. I also live in Florida and also wonder if it is workable in my warm to hot climate. Thanks Cuz Vinnie
    Vincent Cashin
    C56C2571

  2. #2
    Join Date
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    Default

    The flapper is open to the exhaust manifold to draw heated air on cold start-up, it then moves to open the fresh air from the intake in the radiator support after warm-up. I believe the coil spring is thermostatic, expanding or contracting as needed. I don't think the climate in any part of the country matters, the spring may be shot or the flapper stuck.
    C56-91291,
    1952 Ford F-1 Pick-up,
    1962 Chevrolet Impala 427,
    1973 Harley-Davidson FL

  3. The Following User Says Thank You to Bob Barger For This Useful Post:

    rickswrecks (04-10-2017)

  4. #3
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    Default

    Thanks Bob, my flapper butterfly does move but it stays closed most of the time. Do you know if the thermostat spring is available ? Vin
    Vincent Cashin
    C56C2571

  5. #4
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    Default

    It is adjustable. You should be able to check it by disassembling it (removing it from the snorkel - don't take apart the spring and bi-metal piece) and putting it in boiling water. The unit probably needs to be cleaned up.
    Joseph Stebbins


    c56j3340

  6. The Following 2 Users Say Thank You to Joseph Stebbins For This Useful Post:

    cuz vinnie (04-12-2017), rickswrecks (04-11-2017)

  7. #5
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    Default

    I put a torch to it and the butterfly never moved, took the spring off and left it open. Every day in Florida is in the 80's
    Vincent Cashin
    C56C2571

  8. #6
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    Default

    I wouldn't recommend a torch as the metallurgy of the bi-metal spring would fail at high heat - but given the condition you describe yours being in I doubt the unit was working anyway. Here in New Orleans it is pretty much the same - it gets down in the high 40's and people break out the parkas!
    Joseph Stebbins


    c56j3340

  9. The Following User Says Thank You to Joseph Stebbins For This Useful Post:

    cuz vinnie (04-23-2017)

  10. #7
    Join Date
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    Default

    Quote Originally Posted by Joseph Stebbins View Post
    I wouldn't recommend a torch
    Nor would I!
    C56-91291,
    1952 Ford F-1 Pick-up,
    1962 Chevrolet Impala 427,
    1973 Harley-Davidson FL

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