Leak-Proof Quadrajet Well Plugs
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- เผยแพร่เมื่อ 5 ส.ค. 2024
- According to the manufacturer and Quadrajet experts, four-barrel carburetors built before 1975 had leaking primary and secondary well plugs (plus a couple of other spots).
The best way to take care of this issue is with fuel-impervious epoxy or, ideally, with mechanical plugs.
I have had excellent results using epoxy in the past. But set screws for the primary wells and new aluminum plugs with O-rings for the secondary wells are the better, long-term option.
This video shows how I installed 10-32 set screws for the primary wells after drilling out the factory plugs. The best time to do this upgrade or repair is during a complete carburetor rebuild.
I hope you find this video helpful.
Thank you for watching! 🙂👍🏻
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CONTENTS
00:00 Quadrajet Primary Set Screws
00:18 Drilling Out the Original Well Plugs
00:40 How to Remove Old Well Plug Remnants
01:47 Tapping the Primary Wells
03:11 Installing 10-32 Allen Head Set Screws
04:45 Secondary Wells and Other Leak-Prone Circuits
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CORVETTE PRODUCTS (sponsored)
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⭐️ 10-32 x 1/4-Inch Set Screw (20-Pack): amzn.to/3mdjOjV
⭐️ 10-32 Plug Tap and No. 21 Drill Bit Set: amzn.to/3MjEC47
⭐️ Permatex Fuel Resistant Gasket Sealant: amzn.to/3apxrtA
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DISCLAIMER: Even though I like to wrench on 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.
The repairs and other work I do are for my own benefit and entertainment, and even though my videos may sound and appear to give technical how-to advice, that's not my intention.
Working on a vehicle is inherently dangerous. If you're not confident, qualified, or lack the tools to do the job correctly and safely, hire a licensed mechanic.
#corvettec3 #c3corvette #carburetor - ยานยนต์และพาหนะ
JB weld over the plugs has always done well for me
I've been building carburetors since I was 16 at quality Chevrolet when I was a tech always pull them well plugs because there's crud inside there no matter how long you soak that carburetor
man, that's an amazing fix on those small plugs I'm going to do mine like that now that I've seen you do it.
Thanks and good luck! They work great. You can also epoxy the threads if you want, but use Marine Epoxy. 😊👍🏻
Great job!👍
Thank you for watching! 😊👍🏻
excellente
Great video, thanks for demo. Will start mine tomorrow. What thread sealer did you use. not aware of any gas proof ones. was going to use JB weld, its fuel resistant. Thanks
I think I used a gas-resistant thread sealer paste by Permatex, amzn.to/3YKP24D
But the JB Weld you already have should also work fine. 😊👍🏻
I need to pick me up some of that tank weld to seal up my secondary plug wells on my vette 👍🏻
1705 Quadrajet carburetors did not really have leaky wells.
From what I’ve read, it’s kind of rare.
704 and earlier Qjets are prone to develop well leaks.
Did it work? I’ve seen plugs threaded in by others but they always leaked after a while too.
So far, so good 😊👍🏻
How deep can these plugs go before they impede the flow of fuel?
I would not use plugs or set screws longer than the original plugs you remove. Also, use marine-grade epoxy to seal the threads. 😊👍🏻
I'm about to do my primary plugs. DO you think red loctite 271 would work well for the set screws? I read its ethanol and fuel resistant. I'm not so sold on JB I'm reading allot of them leak eventually. Maybe Marine Tex is better? I haven't read about people using Loctite red 271 yet.
what thread sealer did you use?
I used Permatex thread sealer which is also fuel resistant. I like to have the ability to remove the plugs if necessary. Not sure if red Loctite would work. Sorry.
Thank you so much. Your videos are extremely well made and helpful!@@76vette
@@dobetterman1904 Thank you for watching! 😊👍🏻
Hello, I followed your instructions and ordered all the products to repair the primary well plugs but mine still leak after following all your steps. The sealant looks blue in the link that you left compare to the white you use? What would you advise to get this leak repaired? Thanks
Use marine epoxy to seal the threads. That should do it. 😊👍🏻
@@76vette What do you recommend?
I mean what product brand?
would Loctite, 0.85 fl oz, 1 Syringe, White, Epoxy Resin Marine Adhesive work?
@@Achilisvobak Maybe something like this? amzn.to/4f3HfX2
How do you test to see if the well plugs are leaking?
I test them with the carb on the bench. I pour gas, or alcohol, or paint thinner into the bowl and allow it to sit for an hour or so. If the well plugs are leaking the fuel level will go down and the well plugs will be wet.
Thank you!@@76vette
@@thomaspeeler5725 You’re welcome 😊👍🏻