Detailed Quadrajet Carburetor Rebuild Classic G-Body Garage
The most detailed how-to quadrajet carburetor rebuild.
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The Quadrajet to Edelbrock carburetor swap
Replacing my old Rochester Quadrajet with an Edelbrock 1406 carburetor.
This is a 1984 Chevy K20 3/4, just a yard truck for plowing my property.
The old Quadrajet got gunked up from a broken fuel filter so I decided to
try swapping on this old Edelbrock. I had pulled this Edelbrock off an El
Camino I had about 10 years ago and it has been sitting since. I popped
the top and cleaned the inside, also flushed the passages with carb
cleaner. Seems to run well.
The Edelbrock 4bbl is not a direct bolt on to the stock intake manifold.
It has a slightly wider bolt pattern and the shape of the openings is
different. To facilitate installation I bought the Edelbrock adapter kit
model 2696 which was less than $30. It includes the adapter plate, two
gaskets, and mounting hardware.
I also purchased for about $8 the Edelbrock 8009 throttle cable adapter kit
which allows the stock GM throttle cable to interface easily to the
Edelbrock caburator armature.
The biggest adaption here was the fuel line. The Rochester Quadrajet has
the fuel filter in the the front of the carburetor and is fed by a metal
fuel line that threads in there. The Edelbrock's fuel inlet accepts a
rubber line and is on the side towards the rear. I cut my metal fuel line
and attached a rubber line to it with an inline fuel filter to the
Edelbrock 1406. This seemed to work very well.
I had to extend my PCV hose about an inch. This was easily done by cutting
it and splicing with a piece of metal tubing. The brake Booster vacuum line on the rear of both carbs
is identical and required no modification. Same with the distributor
vacuum advance, same location on both carburetors.
Edelbrock 2696 adapter plate kit
Edelbrock 8009 throttle cable adapter
Rubber fuel line
Inline fuel filter
Flat head screwdriver
Phillips screw driver
5/8" tubing wrench (fuel line and brake Booster fitting)
1/2" wrench (carb mounting bolts)
3/4" wrench to swap brake Booster
Something to cut fuel lines with