Vacuum connections--check valve = PCV valve?

Discussion in 'The Big Chill' started by NZ GS 400, Jul 5, 2020.

  1. NZ GS 400

    NZ GS 400 Gold Level Contributor

    67 GS 400 factory air. vacuum hoses to outside diagram.PNG

    The nipple on the PCV valve is too big. Wrong valve?
     
  2. gsx455-4ever

    gsx455-4ever Gold Level Contributor

    No the check valve is not the PCV. It is probably a one way valve or most probably the vacuum storage tank . This is so it doesn't switch " Modes " under hard acceleration for lack of vacuum .
     
  3. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Thanks for your reply gsx455. What is the vacuum storage tank? I will be needing to buy a replacement one way valve or storage tank. The a/c system is missing those parts apparently. When I got the car the vacuum lines were all cut off at the firewall.
     
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Ed,
    Do you have a 1967 Buick Chassis Manual? The Heater A/C chapter goes into detail about the vacuum connections and how everything works. I don't believe the 67's use a vacuum storage tank.
     
  5. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Hi Larry, yes I do. I also have the assembly manual. I haven't seen reference to a vacuum canister, so I think you are correct. As far as the check valve goes, here is another diagram with part number, but I don't come up with anything in my searching. check valve.png
     
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

  7. NZ GS 400

    NZ GS 400 Gold Level Contributor

  8. gsx455-4ever

    gsx455-4ever Gold Level Contributor

    Any one way check valve will work . Just make a manifold vacuum source the other side .
     
  9. telriv

    telriv Founders Club Member

    On the earlier cars, like my '64 Riv, they had a round ball that was a storage tank
    /check valve mounted on the right fenderwell.
     
  10. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Thanks guys.
     

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