Discussion in 'The Big Chill' started by NZ GS 400, Jul 5, 2020.
67 GS 400 factory air.
The nipple on the PCV valve is too big. Wrong valve?
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 .
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.
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.
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.
It's a vacuum check valve. Bet you can find a replacement that will work. Just Google it.
I found this but it is out of date
Any one way check valve will work . Just make a manifold vacuum source the other side .
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.