Replacing Needle & Seat on a Quadrajet Carb

A step-by-step video on how to remove a 1705 Quadrajet air horn, then remove and replace the needle seat and needle, adjust the float, and reassemble the carburetor.

In this video, I show how I did it using my Corvette C3 Quadrajet carburetor, but the same procedure applies to most Quadrajets, whether for manual or automatic transmission vehicles.

Thank you for watching! 🙂👍🏻

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CONTENTS

00:00 Starting Carburetor Disassembly
00:53 Disconnect Accelerator Pump Lever
02:20 How to Remove the Air Cleaner Threaded Rod
02:54 Remove Choke Vacuum Brake
03:58 Remove Choke Blade Lever
04:26 Remove Secondary Metering Rod Hanger and Rods
05:04 Remove Air Horn Screws
09:05 Separating the Air Horn from the Carburetor Body
10:12 Remove the Accelerator Pump
10:37 Remove the Gasket
11:22 Removing the Power Piston, Float, Needle, and Needle Seat
16:30 Windowed vs. Non-Windowed Needle Seat
17:34 Installing a Needle Clip and How To Connect it to the Float
18:48 Installing a New Needle Seat and Gasket
20:10 Determining the Correct Float Level
26:10 Adjusting and Setting the Float Level
31:40 Reassembling the 1705 Quadrajet
32:00 Installing the Power Piston
33:50 Installing the Gasket
34:37 Installing the Accelerator Pump
35:15 Reinstalling the Air Horn
40:55 Connecting the Choke Blade Lever
41:40 Reinstalling the Secondary Metering Rods and Hanger
42:40 Reinstalling the Choke Vacuum Brake
45:15 Reinstalling the Air Cleaner Threaded Rod
46:18 Reconnecting the Accelerator Pump Lever and Roll Pin
48:30 The Quadrajet is Back in the C3 Corvette
48:55 Starting the Vette with the Rebuilt Quadrajet 1705
57:20 Subscribe and Watch Another C3 Corvette Video by 76vette

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DISCLAIMER: Even though I like to wrench on my Corvettes and most of my videos are of a how-to nature, I am not responsible nor liable should you decide to follow my musings on the subject.

I am a DIYer, and the repairs and work shown are for my benefit and entertainment. If videos appear to give technical how-to advice, that is not my intention.

Working on a vehicle can be dangerous. If you're not confident, qualified, or lack the tools to do the job correctly and safely, hire a professional mechanic.


#corvettec3 #c3 #c3corvette #carburetor