Quadrajet Problem Solving > Quadrajet Parts and Numbers

7026240

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Kenth:
Looks like someone made a "frankencarb"?
Those stamping does not belong on a 1966 7026240 Buick Quadrajet, should have a disc like in my pic.
Need to see all parts of carb and measure the calibration to know for sure.

drhach:
So someone had a blank casting and stamped their own number? I don't see any evidence of overs tamping or grinding.

Kenth:
Area were the ring holding the tag sat looks tampered with, so i guess yes, they stamped their own number on a virgin surface.

drhach:
Well, my hope is that it actually is a later casting that will have the better float fulcrum and not have the weighted secondaries. I was more interested in the manifold than the carb. I considered it a happy accident that I got a carb and manifold for the price of the manifold. The commentary that I've read from Cliff is that the 66 carb isn't preferred. The manifold is a 1966 only option for Buicks. If I actually have a later carb, I'll consider that a bonus.

Cliff Ruggles:
I try to avoid the 1965-66 units and for good reason.  They have many defects and the factory knew it.  Right to start with the fuel inlet plunger valve and bypass system is a hopeless MESS.  Even with the upgraded parts they still leak easily at the bypass if you push in the plug with the "O" ring on them. 

The weighted secondary deal is HOPELESS!

I still restore a few here and there, but end up rejecting quite a few of those early units for casting problems and even if they are in decent shape they will ALWAYS leak at the bottom plugs and often at other plugs driven into them so seal off drilled passages, etc.......Cliff

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