Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

87 Cutlass Salon

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old cars:
"those crappy blue pump seals " I don't know what kind of gas you guys are running down there but those blue pump seals seem to work fine with our gas. In fact we still see guys running the old black buna rubber ones and getting away with it.

Cliff Ruggles:
This is what I see on a daily basis here and why I have seals made that are not effected by this new fuel and come with a lifetime warranty.

old cars:
Let me clarify. I don't believe your seals are any better. The "crappy blue seals " do an excellent job. Nice pictures though. Especially the ripped one.

Cliff Ruggles:
They are a LOT better than what shows up on the pumps available from the main suppliers.

The "blue" seals they are using are "soft" and swell up in modern fuels.  I test them periodically and all of them will swell up if you put them in fuel and let them sit for a few days.

So I remove them from the pumps we buy and install my seals and have had ZERO issues with them.

I get carburetors in here all the time just rebuilt with NAPA and other over the counter kits with failed blue seals on them, some have failed in just a day or so.  The seals will do one of three things, swell up and stick in the bore, swell up and fall off the pump and get wound up in the return spring, or tear.

Had a local customer come in here late last Fall and hand delivery 2 Marine carbs he rebuilt himself with NAPA kits.  They didn't last a week and lost pump shot.  One seal tore, the other was stuck so hard in the bore I pulled the pump into two parts prying it out of the casting.  I did this right in front of him as he contracted with me to repair them on a Saturday. 

IF you really think those POS soft blue seals are up to par I have thousands of them, how many do you want?

I took the pic below one day in the shop when I was swapping out the seals.  You can see the color difference as the "soft" seals are in the front row on the left.  They aren't worth two squirts of duck poop, and if anyone wants some of them just let me know......

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