Bartke
03.05.2021 4:45:19
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One word of caution. The photograph below shows the power piston adjustment valve (red arrow). DO NOT mess with it. [links]
I let the carb sit on the bench for a good hour, and then looked underneath since you can see the primary wells without taking the carb apart. They were covered in gas.
The first thing I removed was the air-cleaner assembly stud. This part is easy to remove and reinstall, in case you get cold feet about taking off other components.
With the gasket off, you can now remove the primary metering rods along with the hanger, power piston, and spring. [links]
No. Not really.
In my opinion, Quadrajets are a miracle of engineering and, consequently, have lots of components that usually are interconnected to something else through a network of oddly-shaped rods and levers.
The photo below shows how I had to push the hose off of the vacuum nipple with a flat screwdriver. Time, heat, and other factors have a tendency to glue hoses to metal. Fortunately, this hose can be reused.
The Quadrajet carburetor suffers from a fuel leaking problem. During manufacturing, GM drilled holes in the bottom of the bowl and plugged them with brass plugs. Over time, these plugs leak and leakage from the secondary metering well plugs are the most common Quadrajet carburetor failure. To fix the problem, pick up a Quadrajet carburetor plug repair kit at NAPA or a carb specialty shop (See attached photo). The kit contains aluminum plugs with rubber O-rings to seal the openings. It also comes with a die-cut foam pad that sits in the throttle body section of the carb and applies pressure to the new plugs to keep them in place.
Remove the carb from the vehicle and separate the throttle body from the bowl. If you find fuel in the area under the plugs, you’ve found your flooding problem. Remove the old plugs and install the new ones.
For a photo of the carb showing the plugs, click here
© 2012 Rick Muscoplat more
All the info on internet says use JB Weld to seal them up, but even the
counter kid at the local Pep Boyz says don't use it (epoxy) as it will
fail, probably eaten by the *** in the gas.
>I've narrowed my soggy Quadrajet (1985 chevy 454) problem down to slow
>seep from soft plugs at bottom of main jet wells.
>I've heard that there are special plugs made to do the job - either a
>metal plug with an o ring, or a foam disk to go behind a new soft plug.
>Anyone know source of these, and if they last for a few years of hot
>weather, *** in gas, etc.?
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