The Stovebolt Site Forums The Shop Area Engine Shop Hot engine flooding

I am running 1966 carter avs carb on a 327 in my 64 pickup that floods (sometimes to the point that gas is actually on the intake) when the engine is shutoff when hot. I have tried resetting the float with no luck. I have been told my carb is junk but don't believe it. Is it possible that the heat exchange under the carb is full of carbon and causing it to "boil" over? Any ideas?

There are well plugs in the bottom of the carb That may leak. You can fill the cavities with epoxy. You might put a plastic spacer under the carb. If the heat passages were plugged up the carb. would run cooler than normal.

Don't give up on the carburator yet! Install a thick heat isolator gasket under the carb. It will help keep it cool, also install a pressure regulator in the fuel line. You shouldn't need one if you are running a stock fuel pump, but they do aid in trouble shooting. Turn the pressure down to 2-3 psi and see if it helps. Is your fuel pump or filter set up for fuel return? Most of the 60's vehicles had a return line which took pressure off the needle and seat. Is the fuel line running right up next to something hot? this will cause the pressure to rise and flood over. Is the carb over full with fuel after is does this, or did all the fuel drain out? The well plugs underneathe could very well be leaking. Pull the top off and look next time. Joe

Thanks guys for all your help. You have gave me hope! If the well plugs were leaking, would the truck run like it had a vaccum leak? Also, this problem did seem to pop up after I replaced the fuel pump last summer. The metal line was also against the cylinder head.