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Carburetor Rebuilding Tips
Thermo-Quad Rebuilding Tips
Rebuilding a Carter Thermo-Quad is not an especially difficult undertaking; however, a few words of
caution will keep you from questioning your sanity once the carburetor has been disassembled.
One important suggestion concerns removal of the accelerator pump from its chamber. As shown in
the photo on page 92, a hammer and punch are used to remove the pump intake check assembly
at the bottom of the chamber. What isn’t obvious is the gusto with which the hammer must be
used—a light tapping won’t come close to doing the job. Be sure to position the punch squarely on
the top of the pump rod so that it doesn’t slip off and chip the air horn assembly.

You are also well advised to treat the phenolic resin main body with a bit of care. It is, after all, a
hard plastic and, although it is extremely durable, it can chip or crack if it is dropped or mistreated.
Tools required to rebuild the Carter Thermo Quad carburetor Removing the secondary lockout linkage
Nothing is more exotic than the garden variety
of tools needed in the assembly and
disassembly of a Thermo-Quad. Not shown is
the secondary air-valve adjustment tool (part
109P-397). It’s not absolutely essential, but it
does make life easier. If a carburetor stand is
unavailable, use a block of wood to elevate the
carb from the workbench to prevent damage to
linkage or throttle plates.
In order to remove the metering rods and
hanger bracket, a portion of the secondary
lockout linkage must be detached from the
transfer rod. This linkage prevents the
secondary throttle plates from opening while
the choke is closed.
Removing the screws for the metering rod retaining plates Removing the metering rod retainer
Remove the screws that attach the metering
rod retaining plates to the air horn. There is a
screw and plate on each side.
The metering rod hanger is held in place by
this spring clip.
Removing the hanger and metering rods Removing the metering rod spring
Once the hold-down screw and clip are
removed, the hanger and rods may be pulled
out. The metering rods are not held in the
hanger bracket when the bracket is lifted out,
so unless you grasp the rods when lifting the
hanger bracket they will “self disassemble.”
Note the dimples in the hanger (arrows). The
hanger should be installed so that the side with
the two dimples faces the choke horn; they
serve as alignment surfaces.
Next pull the spring from the meter-rod piston
housing.
Previous


This has been a sample page from

How to Rebuild and Modify Carter and Edelbrock Carburetors How to Rebuild and Modify
Carter/Edelbrock Carburetors

by Dave Emanuel
If you want to modify your carburetor-equipped vehicle for
performance today, you can choose from three major carburetor
families – Holley, Demon, and Edelbrock. While Holley and Holley-
style carburetors like Demon have been popular for years with
their well documented successes and quirks, there has never
before been a book covering the ins and outs of the emerging
Edelbrock line of carburetors.

How to Rebuild and Modify Carter/Edelbrock Carburetors reflects
the emergence of Edelbrock carburetors as the predominant
Carter-style carburetors in the market today. A revision of the
best-selling title Super Tuning and Modifying Carter Carburetors,
this book contains more than 300 color photos, illustrations, and
diagrams, covering rebuilding, tuning, and modifying Carter and
Edelbrock carburetors.
Click below to view
sample pages!
1 - History of Carburetors
2 - Carburetor Types
3 - Selecting a Carburetor
4 - How a Carburetor Works
5 - Carburetor Modifications
6 - Carburetor Tuning
7 - Rebuilding Tips
This book also features the history of Carter as well as the history
of the AFB and the AVS since the purchase by Edelbrock. Author
David Emanuel outlines carburetor types, gives a thorough look at
carb selection and carb function, and offers detailed information
on modifications, tuning, and rebuilding Carter/Edelbrock
carburetors.
This is a great book
that anyone who
owns or works on
Carter or Edelbrock
Carburetors will love!
8-1/2 x 11"
S
oftbound
136 p
ages
159 color and 156 b/w photos
Item # SA130
Price: $22.95
Click here to buy now!


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Rebuild and Modify Quadrajet Carburetors
How to Rebuild and Modify Rochester Quadrajet
Carburetors, seeks to lift the veil of mystery surrounding the
Q-Jet and show owners how to tune and modify their carbs for
maximum performance. This is the only book to truly cover
step-by-step instruction on performance building the
Rochester Quadrajet! A complete guide to selecting,
rebuilding, and modifying the Q- Jet, aimed at both muscle
car restorers and racers.
Rebuild and Modify Quadrajet Carburetors
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Holley Carburetor Handbook
The Holley Carburetor Handbook explains the basics of fuel
inlet, idle, main metering, power valve and metering,
accelerator pump, secondary and choke systems on Holley
carburetors. It also covers carburetor repair and adjustment.
Bonus section describes how to choose a carburetor based on
engine size and volumetric efficiency. More than 100 photos,
charts and drawings show you how to do it right the first time.
This is a must have book for anyone working on the Holley
model 4150 or 4160 Selection.
The Holley Carburetor Handbook
Price:
$11.95

Super Tuning and Modifying Holley Carburetors
Super Tuning and Modifying Holley Carburetors shows you
how to select, install, tune, and modify all popular Holley
performance carburetors. This book gives a detailed view of
basic carburetor functioning, modifying for performance
applications, custom tuning for street, racing, off-road,
turbocharging, economy, and other special uses.
Super Tuning and Modifying Holley Carburetors
Price:
$ 18.95



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