![]() ![]() Since you said you thought the carb had never been touched: 50 years of crud, surprised it ran as good as it did. Sounds like I should try the thinner gasket that came in the kit first and see if it works ok. I have compared every part with the replacement and everything matches up. ![]() Yes it does have the brass needle and I do know I will have extra parts as this fits many carbs. Actually, the THINNEST gasket possible will seal the best! Thick mounting gaskets were used to reduce heat transfer from the manifold to the carburetor. Believe it or not, this spec is somewhat less than as tight as one can get using a socket and 18" power handle This is ALWAYS an issue when using thicker gaskets. There is a torque spec for tightening carburetor bolts. The metal sleeves are present to prevent damage to the carburetor body (read cracking the mounting flange) due to overtightening of the mounting bolts. Read the comment about the metal around the bolt holes on the gasket beyond the time limit for editing post, hence this second post. Replacing the brass needle with a ball will result in some fuel being syphoned through the pump circuit into the primaries, resulting in poor fuel economy and zero pump shot when the pump is actuated. These 7 valves vary in mass depending on the engine being fed by the carburetor. There are at least 2 different balls, and 5 different brass needles. This valve is located below the pump discharge nozzle, which is located in the front between the 2 primary venturii.Ĭarter used at least 7 different pump discharge valves in the various AFB carburetors. The pump discharge valve IN CARBURETOR 3895S is a small pointed brass needle (either square or hex) approximately 3/8 inch long. This valve screws into the base of the pump cylinder from the bowl side. ![]() The inlet check valve initially looks like a fith main jet until you look at it closely, and you will see it is an encapsulated one-way valve with spring inside a brass housing. The pump circuit has an inlet check valve, and a discharge check valve. IF YOU HAVE THIS CARBURETOR: There is no check BALL in the carburetor. The original carb for 1965 389 S/T is Carter 3895s. Would have been nice had you specified the exact carburetor number. Did a 65 AFB for manual trans ever have a check ball? Don't see one in the chassis shop manual but it is not totally detailed, not for a novice like me. On a unrelated note, the kit being generic does come with a check ball but I have it all apart and I see no check ball. The FELPRO has metal around the bolt holes so I will wait to see how thick it is. If you want a thicker gasket, these may be stacked just DON'T put gasket sealer on them!!! We do supply sufficient of the thinner gaskets to stack to the thickness of the thick gasket of 1967 in the 1967 kits. In 1967, Carter supplied the much thicker 1A-256 (again new old stock sample) of 0.377. I do have custody of 1 set of the existing Carter drawings. (in this case Carter) new old stock samples only. Most of you know I have been selling off my Pontiac library, and no longer have the 1964, 1965, or 1966 Master Parts Manuals nor would these have helped me in this case, as I kept O.E. I am not going to get into that possibility as I cannot offer proof. Possibly, Pontiac trash-canned all of the thin gaskets they purchased from Carter, and supplied their own thick gasket. The above represents what Carter supplied to Pontiac. The 1966 used a different gasket, but still same thickness. 1964 - all Pontiac AFB carbs flange gasket 1A-124 thickness 0.077ġ965 - all Pontiac AFB carbs flange gasket 1A-124 thickness 0.077ġ966 - all Pontiac AFB carbs flange gasket 1A-226 thickness 0.077ġ967 - all Pontiac AFB carbs flange gasket 1A-256 thickness 0.377ĪLL of the GTO carbs were supplied with the 0.077 gasket (I have new old stock samples). ![]()
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