Carburetor Rebuild


Rebuilding a Quadrajet isn't as scary as is may seem. A rebuild kit will cost you under $20. You'll need basic tools, but I suggest buying or borrowing a flare nut wrench to remove the fuel line and a one inch wrench to remove the fuel filter. The fuel line is usually on pretty tight and if you try to use a open end wrench, you may round off the nut. You also might want to consider buying a good Rochester carb manual.  It is also a good idea to replace the float and fuel filter while you are doing a rebuild.  

A good cleaner is a must; some people use kerosene because it cleans well, is inexpensive and it isn't as volatile as gasoline. I suggest using a container to store the smaller parts as you do your rebuild. I also suggest taking measurements of the accelerator pump rod and float before making any adjustments.  I found the best way to set the float is by holding the carb upside down when you make the measurements.


This is the airhorn assembly shown upside down on my workbench.
This picture shows the main body of the carburetor. This is where the float, main jets/metering rods, triple-booster venturi, choke, and accelerator pump are located; to name just a few of the systems. Surprisingly, there are far fewer moving parts than expected.


On one of many carburetor teardowns, I decided to epoxy the plugs on the underside of the main body.  They are notorious for leaking.  The leaking can be bad enough to drain the float bowl after letting your car set overnight.  I removed all the grime with an wire brush then clean the area with a cleaner.
I use JB-Weld 2 part epoxy to seal the plugs.  I let the carb set overnight before reassembly.
This is the throttle body. The throttle body is where the idle mixture screws and throttle valves or plates are located.
Back in one piece.

A rebuild will add new life to your carburetor and will only take an afternoon to complete.

Forget where to put all those vacuum hoses?  eng_vac.jpg (79212 bytes)