![]() ![]() 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. I might opt for a phenolic spacer under the carb instead if you have the hood clearance - they come in 1/2" & 1" 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). It seems to me to be rather bulky and I don't know how effective it really is. This pic/description may be the same one from above and it says both gaskets are attached, which is what I would use anyway and more often not, two gaskets are mentioned. Here is a discussion on it and photo of one at the bottom link if you click on it. The aluminum is soft enough to create a seal between the base of the carb and the plate - but I personally would use a thin undercarb gasket myself just to ensure no issues in case their might be any slight warping anywhere. Read on one blog that the gasket goes between the plate and top of the intake manifold and the carb then sits on the plate. Not sure when they discontinued their use on factory cars. The larger heat shield such as you have would seem to be an extension of that design in that it kept additional heat off the carb when you shut the engine down - "heat rises and when the vehicle’s engine is turned off, the rising heat can easily penetrate the carburetor and cause the fuel in the float bowls to expand and eventually boil or percolate."ĭoing a quick web search it seems the larger heat shield was offered by GM on their Chevy performance engines and the earliest date I found with a picture of one was 1969. This metal heat shield sealed off the slot in the intake and then the carb went on top. Have never seen one used on a car or GTO in all the car shows I have attended over the years, but have seen them loose or in pictures as you have.Ĭhevy engines used a heat shield more like your typical carb gasket because the intake had an exhaust heat slot that went under the front of the carb - like the 1967 only Pontiac intake. ![]()
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