QuadraJet 702 Carburetor Rebuild

This Quadrajet 702 had seen better days, and a complete rebuild/restoration was needed to bring it back into service in a 1969 Corvette Stingray.

And even though aluminum does not rust, it corrodes to make a restoration really challenging.

Anyway, after days of cleaning, rebuilding, polishing, and reassembling every single part, this 702 was brought back from the dead and it's ready to be put back into service.

If you have always wanted to rebuild your Quadrajet, I think you will find this video very helpful.

Thank you for watching! 🙂👍🏻

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CONTENTS

00:00 The Quadrajet 702 Carburetor
00:38 Disassembly
01:02 Removing the Idle Vent
02:08 Removing the Accelerator Pump Lever
03:03 Removing the Curb Idle Screw
03:13 Removing the Fuel Filter
03:45 Removing the Idle Mixture Screws
04:40 Disconnecting the Choke Rod
05:14 Removing the Vacuum Brake and Fast Idle Mechanism
06:50 Removing all the Air Horn Screws
07:57 Removing the Secondary Metering Rods
08:41 Removing the Choke Rod
08:53 Removing the Air Horn
09:40 Removing the Accelerator Pump
10:00 Removing the Air-Horn-to-Body Gasket
10:35 Removing the Float Bowl Insert and Power Piston
11:33 Removing the Carburetor Bowl Float and Needle
12:18 Removing the Primary Jets
13:31 Removing the Check Ball
14:12 Removing the Needle Seat
15:22 Removing the Secondaries Baffle
15:56 Removing the Base Plate, aka Throttle Body
18:01 Inspecting the Secondary Well Plugs
20:10 Removing the Primary Throttle Shaft
22:49 Removing the Secondary Shaft Springs
24:35 Giving the Carburetor Body a Bath
25:28 Removing the Air Horn Well Tubes
27:37 Cleaning and Detailing the Carburetor Body
30:06 Grinding Down the Primary Throttle Blade Screws
31:24 Removing the Secondary Vacuum Brake
32:39 Well Plugs Leak Test
33:59 Sealing the Well Plugs with Epoxy
36:24 Second Well Plugs Test After Adding Epoxy
37:18 Polishing the Carburetor Body, Air Horn, and Base
38:36 Air Horn Well Brass Tubes Reinstalled
40:21 Replacing the Idle Vent Seal
41:47 Reinstalling the Idle Vent Parts
43:00 Installing a new Power Piston Retainer
43:52 Installing a new Vacuum Brake
44:14 Reinstalling the Carburetor Base Plate
45:14 Installing a New Fuel Filter
46:04 The Carburetor Body Choke Lever and Rod
47:28 Float Adjustments
48:23 How to Install the Needle Clip or Hanger
50:15 Final Assembly and Adjustments
51:58 The 702 Quadrajet Before...
52:46 and the 702 Quadrajet After

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CORVETTE PRODUCTS (sponsored)

76 Vette Assembly Manual: https://amzn.to/2GBuHrd
68-82 Corvette Manual: https://amzn.to/3devEEW
How to Restore Corvette: https://amzn.to/35B6L0R
68-82 Vette Resto Guide: https://amzn.to/2QvvIG

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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 self-taught DIYer. 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 mechanic.


#c3corvette #quadrajetcarburetor #carburetor