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@dmcnamara9859

6 жыл бұрын

I rebuilt (this weekend) the Quad off my 1974 Caddy that I bought 2 years ago.....found the reason why it was guzzling gas at idle(really bad black smoke in the morning).......lead plugs were a little loose(whacked them with a Punch and then a light coat of 2-Part Epoxy)......and whoever tried to rebuild the Carb the last time.....did not install the metering needles down the in the Jets below the Float. I did make a tool to hold those metering needles in place before placing the gasket and top part on. Your Quadrajet is laid-out different in many ways than the one on the Coupe Deville. Too save money on Brake Cleaner/Carb Cleaner....I bought a small bucket and lid and filled it to the top of the Carb with gasoline.......the next day.....almost the entire exterior/interior of Carb was spotless. Another tip, I used Q-tips in the hollow areas where Carbon and the slightest amount of varnish had gathered.

@irenestewart1573

6 жыл бұрын

Vacuum diagram for 1984 c30 454 Ci

@rtl-palvelutoy3181

6 жыл бұрын

Idle mixture quadrajet

@wymanclark5582

5 жыл бұрын

Love the video, I just bought a 77 GMC Vandura box truck with a 400, it has been sitting for a long time. It drove great till I put gas in it, then it started gasping for fuel. Bought a new fuel pump, haven't put on yet but was wandering if I could send you my carb because I know you would do a thorough job of rebuilding it. I don't know if anyone in my area would do as much as you did. I usually do my own work on my vehicles. After video I know I could trust your work.

@EarlGuyton425

5 жыл бұрын

I want to share some speciai information with you on my 40 years experience on these carburetors and the one you rebuilt in that video. Concerning the power piston and air horn upper carb gasket.. Whether it be the non computer rochestor carb or the computer carb from 80 to 90. On my personal cars ever since my cadillacs of the 1970s and 80s ive owned and my present 89 brogham cadillac with the olds 307 I MODERATE THOSE UPPER GASKETS.On that gasket, the part that goes around the power piston and the needles I CUT IT OUT!! It serves no purpose and as soon as you run that carb on your car that gasket sags due to gasoline and rubs against the power piston needles and they get stuck or dont work fully. Your airhorn assembly also on the top has two nostrils iike a nose in front of your choke housing or a cylinder so the float bowl can breath, and to have gasket material over that float and around those power piston needles sags and pushes down on the float and rubs those power piston needles when it tries to go back up or down. Cut the part out with scissors that goes around your power system and you wont be having trouble. I cut that part out of all my upper quadrajet carburetors. Even on the two barrel carbs cut that part OUT

This video has taught me more than any book has. My only wish was watching this before I first took my carburetor apart and struggled and cursed putting back together. I did horribly that i caved and took to a shop that didn't fix the original problem I had with it. Thats a story for a different time. Thanks for making this video and for giving me the confidence of working on my carb again cause you explained everything well. You got a new subscriber.

@ClassicGBodyGarage

3 жыл бұрын

Thanks for your support!

The best detailed overhaul I have ever seen. I've rebuilt dozens of these carbs and learned a lot of info from this video. Well done!

@ClassicGBodyGarage

4 жыл бұрын

Wow, thanks!

I wanted to express my gratitude to you for making this video. Two weeks ago my old Dodge truck stopped running and I knew it was the carb but I have NEVER build one in my life. I called 7 auto shop and no one would work on my old truck. I said what the hell. I bought myself a carb kit went on KZread and found your video. I have watched it several times and I felt as if I could do it. Today 2.18.3019 I went for it and step by step I cleaned replace and repair just as you suggested and BAM! MY old truck runs GREAT! Smooth as a new car, idles smooth, great pick up and that small secondary lever, I left it on and it worked great too. I'm so impressed with myself and thanks to you I did something I always thought I could not. You have a friend in Texas!

@ClassicGBodyGarage

5 жыл бұрын

This is exactly what this video is all about. Keeping those old vehicles back on the road. So glad you attempted it and now you can have great pride whenever you drive it! Thanks for watching. Your comment means a lot.

I have rebuilt many of these Qjets. Your video was great and im sure it helped out alot of new carb rebuilders. The only change i would do would be use the choke rod to drop in the choke lever when attaching the choke housing to the main body.

Very detailed and well done video! Do not forget to check the primary throttle plate bushings, as they do wear with age and may present a vacuum leak, that you won't be able to 100% compensate for with the idle mix screws. If the screws were out of sync by two or more turns, there's a good chance, that the bushings are worn on the throttle linkage side. I used to overhaul these carbs for a living and really liked them as they gave very little trouble when cleaned, assembled and adjusted correctly.

@ClassicGBodyGarage

7 жыл бұрын

Excellent tip! I do check those on the carb before i tear into them.

I have seen a bunch of people toss a good q jet because it develops an off idle stumble- i take their “bad” q jet - install a new accelerator pump plunger and go do burn outs- your video is the best rebuild i have watched so far- people dont realize their is only 2 q jet sizes 750 and 800cfm- GM used millions of these carbs on hot small blocks and big blocks that were very fast- they are still used today by guys that can tune them to run 9s in the 1/4 mile - that is screamin fast-

I don't understand why this video doesn't have more views. I've been looking at rebuild videos for almost 3 hours now and this is the best one yet. Awesome job and very helpful. Looking forward to doing my first rebuild. 👍👍👍

@RichardPortfolio

5 жыл бұрын

Same here! This is the best video out there on it!

@yarpos

5 жыл бұрын

probably more a statement about the popularity of Qjets than the video itself

@mikeyhue2437

4 жыл бұрын

Theirs a ton of actual informal vids on these carbs, what to look for, how to fix/repair cause rebuild kits dont always fix the issue

@michaelsclark

4 жыл бұрын

Because working on and rebuilding carburetors is a art and sadly its getting lost

@empireofdirt7536

3 жыл бұрын

@@mikeyhue2437 AND..... a lot of problems get blamed on the carburetor that are valve timing, weak sparks, ignition timing, worn, camshafts, and simple vacuum leaks.

great video! I have searched everywhere and haven't found a detailed video. I'm 17 and will be attempting to rebuild my quadrajet on my 1978 k10 tomorrow for my first time. this video is very detailed and will definitely help me out. Much appreciated!

@ClassicGBodyGarage

7 жыл бұрын

Thanks man. It's very cool that someone your age is into old trucks. Take your time and enjoy your rebuild.

@levigilbert9896

7 жыл бұрын

just wanted to let you know it was a success! my truck is running better than ever. I very much appreciate the help

@gamesta8884

5 жыл бұрын

I’m 16 and rebuilding my 79 c10 carb today😂

@OregonSlimMF

3 жыл бұрын

I'm 40 and still learning this and much more. I'm bringing an 85 K10 Suburban 5.7 350. It doesn't have this carb on it but I've had one of these sitting on a shelf for a few years after a friend's dad gave me it thinking it was for an 86 F-250 and I found out a bit later it wasn't. Now I know what to do with the dang thing. I appreciate this info. You kids keep it up. We all should know this kinda work anymore.

@winchester37a

2 жыл бұрын

How did it go, I got a 78 I’m completely rebuilding and doing the same thing

Easily the BEST how to rebuild a Q-Jet that I have seen. Thank you!!

Great video! My husband followed every step and now our truck runs great. Thank you so much for making the video so well informed, it really saved us!

@ClassicGBodyGarage

7 жыл бұрын

I love to hear this! Thank you for watching and for your comment!

One of the best carb videos I have seen. Very thorough, and well described. The entracies described in this video make the differences between a failed rebuild and a great rebuild. Thanks for taking the time, and helping those of us attempting this project.

I see this video was posted 9 years ago. This is 2024. I wanted to let you know you are still helping people. I purchased a 79 C10 and have been ordering parts to rebuild and restore. I will be using your video to pull the carb and rebuild it. It runs but chokes out when given gas. Thank you for posting and leaving this up.

I'm restoring a replica Indy Car that was a barn find. It wasn't started for 8 years. I've never rebuilt a carburetor, but I wanted to do the restoration myself. I watched your video several times before diving in. It was very detail and easy to follow. After cleaning, I followed your video step by step and it went back together easily. I bolted it back on the 1969 Chevy 350 SB, hooked up the fuel line, etc., started the fuel pump and on the second try, the motor roared back to life. With the straight headers, a few neighbors came out of their houses to see what the hell was going on! Thanks for taking the time to make a great video!

@ClassicGBodyGarage

6 жыл бұрын

Very cool! Love to hear this! Glad my video helped you. Thanks for watching

I have the Mercruiser 5.7 with the Rochester Quadrajet on my 1992 Crownline bowrider. It's been hard to start for the past three years. I thought it was just because the fuel was evaporating out of the float bowl if it sat too long. An easy remedy was just to hit it with some starting fluid in the driveway before I headed out to the lake, then it would run fine the rest of the day and start without a problem. I had read many boat forums concerning this matter, and everyone concluded that these older boats "just do that". Now I know why and how to correct it when I rebuild the carb next. Thank you very much for what I would consider one of the best carb rebuild videos on KZread !

@ClassicGBodyGarage

2 жыл бұрын

Thank you for this awesome comment!

The best description of rebuilding a Quadrajet, no doubt! Watched this a few times, worked like a charm. My model was the 17057229 1977 Chevy G30 6.6L (400). Hardest part I found was getting the choke set up properly again (like you said in the video), other than that was able to rebuild in 2 days with this video. When I share up my video on restoring a Chevy 400 V8 6.6L I will be linking to this video to show how to rebuild a Quadrajet. You the man G-Body!

@ClassicGBodyGarage

5 жыл бұрын

Great! Thanks for watching.

Best rebuild video ever, completely disregarded the instructions that came with my rebuild kit and followed your video with great success. Thanks for quality video!

@ClassicGBodyGarage

2 жыл бұрын

Glad it helped

Fantastic video! Just finished rebuilding the Quadrajet on a '71 Buick Riviera. I couldn't have done it without your help. Thank you so much.

The best information available to rebuild a Quadrajet Carb, A thousand thanks for taking the time and patience to teach an 80 year old man to feel confident enough to take on the Task. Great Job.

@ClassicGBodyGarage

3 жыл бұрын

Glad to help

I have rebuilt hundreds of Q-Jets in my day. When removing or installing the choke arm inside the body of the carb it is best to leave the rod on the arm. It helps when removing the choke arm. When reinstalling the choke arm it can hang on the rod and as you insert the shaft from the choke housing you can pivot the arm with the rod until it engages. Lots of memories from my auto mechanic days. The Q- Jet is my favorite carburetor. By the way Holley's suck.

@ClassicGBodyGarage

5 жыл бұрын

Thanks for the tip! I also agree that Holley sucks and that is why I rebuild the Qjets. Great carbs. Thanks for watching and for your comment.

@jeffcuevas5918

5 жыл бұрын

If we are talking about carbs that suck I want to add edlebrock to that list.

@daltonbrink9924

3 жыл бұрын

@@jeffcuevas5918 Edelbroke

I watch this video many times but I finally use it last week to help rebuild my 2 barrel Rochester. I found the filter was double gasket and piece of plastic was block my float and needle making my carburetor overflow. Grateful for this video! Thanks gbody garage

@ClassicGBodyGarage

2 жыл бұрын

Happy you got it all figured out with the help of my video!

Can't find one person that could rebuild it for me, so KZread here I am. Thank you Brian, Always very detailed, I love it.

Excellent video! This was a big help. I've watched this probably 6 or 7 times. Just rebuilt the quadrajet for my 82 Blazer.

Those were the days when you can get your hands on your engine. Now, we are driving computers on wheels. Fantastic video!!!!

Thanks for the best quadrajet rebuild video I have found.

@ClassicGBodyGarage

7 жыл бұрын

and thank you for watching and commenting!

Getting ready to rebuild the Quadrajet on the 1966 Buick Electra 225 I inherited. This video makes the task less intimidating. One of the better KZread instruction videos I have watched. Thanks.

Thank you for the detailed instructions. After watching your video I realized I missed an important step in the rebuild process.

I need to say thank you for making this video. I am 1000 miles from home in my 1981 Chevy G30 based RV, and needed to rebuild the Q-Jet on it. The info given was spot on. The last person to try it had several things wrong.

Outstanding. I followed you along and rebuilt a 76 Bette quadrajet that is on my olds 455 jet boat. I couldn’t have done it without you!🎉

fantastic video. Like many others I have been intimated to do anything to quadrajet. I have a family heirloom all original bigblock monte carlo that has been sitting in storage for over a decade. I put a battery in it and will turn ove and even run as long as someone is pouring gas in the carb. I am about to get the numbers off the carb, order a kit, and attempt a rebuild. All thanks to your instruction. If you are not doing it, you should be instructing people for a living. Hands down the best how to video I have ever seen.

@ClassicGBodyGarage

3 жыл бұрын

Thank you. I really appreciate your feedback.

Enjoyed your video keep the tradition alive with q j restoration

@ClassicGBodyGarage

4 жыл бұрын

That's the plan!

perfect video, Can't believe I paid someone to do this when I bought my first squarebody truck.

I've watched 3 or 4 of these quadrajet rebuild videos. Except for the choke rod hiccup, It's the best one out there. Well explained and great video viewing locations. Thanks!!!

@ClassicGBodyGarage

Жыл бұрын

Wow, thanks! Glad my video helped you out!

So nice to see someone who know what a great carburetor the Q--Jet is. Have fixed hundreds and can say after watching the video you got it down for sure. One of the best carbs ever made. Can be setup to work with just about any engine. Great for milage and performance too. Keep up the great work, V

@MexhomieXlll

2 жыл бұрын

Can u fix mine

@victoryfirst2878

2 жыл бұрын

@@MexhomieXlll The Q-jet is know for the best of both worlds, gas mileage and high power. I am certain you can fix the carb fella. Get a manual and read it and you will be fine.

Have futzed around with my Dual-Jet (2 barrel) a number of times already, but I just learned so much more about it watching this video. They're practically the same carb - but with double the barrels. Think I know what I did wrong this time. Thanks! Great vid!

@ClassicGBodyGarage

5 жыл бұрын

Thanks for watching!

I want to say thanks for the detailed process. You helped me rebuild my first Q-Jet today! I checked several videos and yours was the best. Good detail, to the point and no 5 minute intro or endless jabber between steps. My old truck runs like a bat out of hell right now thanks to the rebuild. To be honest the only thing I found seriously wrong was the tiny horseshoe clip that holds the power piston below the float was missing, which would explain the tremendous flooding problem I was having. At idle the exhaust fumes still burn my nose and I don't know why. I have the idle screws set to 2.5 turns and it idles well. Will check the timing and go from there but overall the 454 is fully awake again.

This video is the reel deal. It is very detailed and walks you down the path from start to finish. Great job. You rock and is very good at what you do.

Did this once about 10 years ago for the first time, put it back on the engine and it ran great. Watching this made me excited to do it again. Awesome video, doin mine tomorrow boats running like shit. Thanks!!!

Great vid. First QJet I did was in 197O ...took apart 3 times to check float level due to flooding out when trying to start. Turned out the float was saturated with fuel due to a small crack. They are not hollow like a brass float but are a foam type construction with a coating to keep the foam dry and buoyant. The weight difference would not alllow the float to rise up to close the needle snugly against the seat once the fuel, in the bowl, was at the correct level. Got a new float, adjusted height, reinstalled and a perfect startup. So, be sure to examine your float for chips or cracks. Hope this may help all those with post rebuild flooding problems. Best to you and yours.

great video I used to fear these carbs when I was young and they were in current use (had one on a 1975 Olds 350) but rebuilt my first one on a marine inboard (1988 Chevrolet 4.3 V6) and it really wasn't near as hard as I thought. Next time I'll have your vid running on my I-pad! Great tips.

@Hammerback0

2 жыл бұрын

I’m fearing one right now. Bought an old truck and the fuel tank has all kinds of trash in it, something must have made it through the fuel filters and into the carb. Doing research before I order a rebuild kit.

@davidchavez3035

2 жыл бұрын

@@Hammerback0 same, just picked up a 79 Stepvan , it’s running but running rich, I’m thinking it’s the carb ,

Very helpful video. The next project for my 1978 C3 corvette was to overhaul the carburettor the accelerator pump was not working and the secondaries were not opening. The assembly tips were very helpful particularly for the power valve. When I reinstalled the carburettor after the rebuild the engine started first time with minimal cranking and ran extremely well. On the test drive there was an increase in power and the secondaries opened up well.

I have a 84 Chevy G20 Van I bought to use as a work vehicle. I am having trouble with it bogging down when I try to accelerate. It will run fine as long as you keep your foot out of it. I change the paper fuel filter you show in the video and all new plugs, wires, and the craziest looking distributor I have ever seen. I know its not a G body but it has a G on the body and your video is spot on man. I cant thank you enough.

@ClassicGBodyGarage

9 жыл бұрын

+Tim Lastname If it's bogging you might need to replace the accel pump but while your there you may as well rebuild the carb.

@MrTwitch217

9 жыл бұрын

thanks for the heads up man. I just ordered one with the carb kit.

@DRIFTCATracing

8 жыл бұрын

+Tim Lastname check the diaphragm that stops the secondary valve opening to quick, also try tightening the secondary air valve spring. check this video at 56.15 to test secondary air valve pulloff its incorrectly named a secondary choke pull off in this vid .

Great video! I am rebuilding a Qjet off a 77 Corvette with 2 of my sons (16 and 14). Got the iPAD on the workbench and we study each of your moves.

Thank you so much , I'm mechanical but carbs are a mystery, had some anxiety took a Zen moment , deep breath ,then proceeded . My 79 Ramcharger has never ran so good since I rescued it from a field , thanks again TimT NY

They are the best all around carburetor you can find. I am 69 years old and have rebuilt my share. If you watch this and check out some of the modifications you Will be Very satisfied. Take your time and video as you go.

@ClassicGBodyGarage

5 жыл бұрын

Thanks for watching Ken!

PERFECT video. i have worked on small engine carbs, but never an automotive carb. i wasnt scared to tackle the task, but this with the help of this video.....it was a breeze. thanks for sharing

Just rebuilt a carburetor for the first time, and it worked out great! Thank you so much for the great video.

@ClassicGBodyGarage

6 жыл бұрын

Awesome! Glad my video helped!

You my friend should receive an award for this video.you are great. very thorough. I have been building hundreds of q jets for the last fifty something years. you are intelligent,thorough and detailed. I might add get a 2x4" block 3 too 6" long hand set your carb. base on stand. also use a white rag or towel too place small parts on hand set parts in groups. also after cleaning power VALVE use a small price of fine steel wool hand spin power VALVE around hand polish holding steel wool against. (6 or 8 spins or until shiney). the power VALVE will raise and lower more freely with vacum.and with time,heat cycles, and fuel vapors taking toll on rubber diaphragms of choke pulloffs, always change pri. and sec. pulloffs ; always !!! and don't forget too not over tighten carb bolts or studs, the carb already is trying too be sucked in engine. lastly when you remove carb too rebuild place a clean rag over carb. intake holes make sure too have a peanut (planters peanut) can too HOLD small parts, nuts. springs in. and when you get it started and running double check for gas leaks and seepage. note q jets best friends is a 5/8" line wrench and a 1" skinny offset OPEN end wrench. if you or your mechanic uses a vise grip pliers on your carb. fuel line then you are DUMBASS.

@ClassicGBodyGarage

6 жыл бұрын

First off, thank you for watching, your comment and your great suggestions. Very flattered by what you said. I am simply spreading my knowledge to help others keep these old cars on the road. I will take your suggestions into consideration the next time I rebuild one of these carbs. Thanks Dennis.

Thank you for this video! I am by no means a mechanic but your video made it very easy to follow and understand. I'm hoping to get my 85 silverado back up and running now.

@ClassicGBodyGarage

4 жыл бұрын

Glad it helped

Great video. I remember messing around with these on my 78 olds about 30 years ago now. Always wanted to tear one down and rebuild it, but we didn't have You Tube back then. Wish I could have had this as a resource back then, it doesn't look so intimidating after seeing this. Time to subscribe...

IT is amazing that people hate these carbs I love them they are so easy to work on and if you know how to work on them they can serve you a very long time and provide you with good performance. Thank you for the video!

Yep I am using this tutorial to rebuild mine very detailed and easy to follow thank you!

@ClassicGBodyGarage

7 жыл бұрын

Excellent. Thanks for watching.

31:44 One of these rubber seals is placed behind the thermal spring bracket at the center of the choke housing (philips screw), the screw you said 21:35 not to mess with☝🏻Better you do🤷🏻‍♂️ Great vid! 💪🏻👍🏻

Thank you for your time creating this video from a UK enthusiast. Answered a couple of questions I had on the Quadrajet.

@ClassicGBodyGarage

8 жыл бұрын

Thank you for watching, commenting and supporting the Classic Gbody Garage Channel!

Thanks so much for this tutorial. Tackled the rebuild with the help of this guide. Great results. boat runs and idles like new.

@ClassicGBodyGarage

7 ай бұрын

Nice!

Thank you so much Sir, I successfully rebuild my carburetor of 1979. Very nice explain and detailed.

@ClassicGBodyGarage

4 жыл бұрын

Glad it helped

I know you have heard it a bunch already, but thank you for this vid. Helped me through a flawless first timer rebuild.

@ClassicGBodyGarage

9 жыл бұрын

buntist Never get tired of hearing it.

Thanks for the video, it sure helped out a lot. I just rebuilt a Rochester Quadrajet 7041211, after 26 years of setting up the car it was on is running again.

@ClassicGBodyGarage

6 жыл бұрын

Excellent! Thanks for watching.

great. im about to rebuild mine out of my 8000 mile original 76 vanbulance I bought from a small city in oregon. carb cleaner on the outside makes it stumble. sat for 30 years and she runs good but sometimes not so much lol. thanks for the detailed vid. much appreciated

Great Video man!! the Passion you have for this Craft is outstanding,you really and truly do care about everyone that maybe watching get the best understanding they can possibly get,this is almost a dying art nowadays, I'm 65yrs.and it's great to have watched your Video! 😊🙏

@ClassicGBodyGarage

2 жыл бұрын

Thanks for your comment. It means a lot!

I am getting ready to remove and rebuild a quadrajet carb and your video is AWESOME.

Awesome video! I just rebuilt the Quadrajet that was on my grandpa's 75 C10. Feels like a real accomplishment, and the step by step helped a ton!

@ClassicGBodyGarage

4 жыл бұрын

Right on! Glad my video helped you out.

Best carburetor I've ever known, still want to get one to daily.

Thanks for the detailed video. I rebuilt mine after watching your video. only took me about 6 hours. Mostly due to all the gunk in it. I decided to rebuild it because it started leaking gas from the accelerator pump. After researching it on the web i came to the conclusion that it was either my float or needle and seat. I replaced everything except the float. I cross checked the distance according to the instructions that came with the kit and they were pretty much spot on. I did notice though that when i moved the float up and down the needle didn't move. I reassembled it and it is still flooding out. I attached the needle to the float as per the instructions by just hanging it on the inside lip of the float arm and not through the holes. Should I visually be able to see the needle move when i move the float up and down? I made sure that the seat was all the way in and that i didn't forget to remove the old spacer. Out of the entire rebuild this is the only thing that was suspect. Thanks again.

This is what KZread is for. Excellent video sir. Thank you very much for taking the time to educate us.

@ClassicGBodyGarage

8 жыл бұрын

Thank you for watching and for your kind comment. It helps fuel me to make more videos to help people out.

Excellent video. I used to be one of those who thought Quadrajet carbs were junk. Of course that was strictly due to my lack of knowledge and not the engineering of.the carb itself. Keep up the good work my friend and thanks for posting the video. Semper Fi!

@ClassicGBodyGarage

7 жыл бұрын

Thank you!

Thanks a ton now i can work on my 84 chevy c10 carburetor. Thanks also for being so detailed about everything keep up the good work.

@ClassicGBodyGarage

3 жыл бұрын

Awesome! Thanks for watching.

I needed a refresher course on rebuilding my Quadrajet. I have your vid in my favorites. Thanks.

@ClassicGBodyGarage

4 жыл бұрын

Great to hear!

Did not feel like an hour at all👍👍 great tutorial thank you

Thank you for the video! Very informative and gave me the confidence to break down my Quadra jet and rebuild it.

Excellent quadrajet carburetor rebuild video.Plus i always wondered where the ball bearing(check valve) was located.Excellent information also on the power piston leveler adjustment(four turns from the bottom) count.Might be bedt to leave it alone to me.

Very helpful. I like your straightforward approach. I'm restoring a 74 GMC motorhome with an Olds 455 with Quadrajet. Thanks again...

@ClassicGBodyGarage

6 жыл бұрын

Nice! Thanks for watching.

Thanks man had a maunaul choke and couldn’t figure how to replace secondary cam you had one one this carb BIG THANKS

This is the best video on how to take a chance on rebuilding it yourself also very clear vocabulary and friendly.3thumbsup!!! clean/clear 👍💯

great video! just like anything else, you can get really good at this if you do it enough times. when i was 15 in 1979 i had a 69 chevelle with a 307 with a really bad carb and i was dead set on rebuilding it since it kept bogging out! I heard 2 older mechanics talking about how they "boiled" their carburators to get them super clean well, i went and got a big pot of water and took that carb apart and threw the whole bunch of parts in there!.. when i told my dad what was i doing and he almost died laughing. He explained to me that "boiling your carb" meant letting it sit in a "solution bucket" for a day. thats the part you are talking about at 30:20....the 2 or 5 gallon bucket of strong solution (kinda like really strong brake cleaner) for cleaning parts. true story. (to be honest, thats the cleanest carburator i ever had..even though the whole house smelled like gas and oil) after about the 3rd time rebuilding a Qjet, i could understand how it worked and how to fine tune it. again... this is probably the best Qjet video.

@ClassicGBodyGarage

7 жыл бұрын

Thanks for your comment and your great story! Love it!

Great video i am going to attempt to rebuild my carb to my 1986 cutlass supreme. Thanks for the video i will be watch a few more times. Thanks again

thanks for a very informative video, i got a carb off a 454 with no power spring ! wow! you touched on everything important,now i know -looking forward to more videos!!!

@ClassicGBodyGarage

4 жыл бұрын

Cool, thanks for watching

I've got a Q-Jet on a 1969 Chevy C-20 I purchased 2 years ago. It looks recently rebuilt as it is clean and can see new gasket material on it. Then it felt like it was loaded up and idling rough. I would step on it hard to open all four's and it would run like normal. Now it idles bad all the time. I tried adjusting the two idle mixture screws and no matter how I adjusted them nothing changed. I could screw one of them all the way in or completely remove it and it would run the same - really rough idle. I checked the timing and discovered the vaccuum port on the front of the Carb on the Driver's side has no vaccuum at all! So I moved it to a vaccuum port on the passenger side of the Carb that used to be hooked up to the air pump and that one does have vaccuum. It used to run fantastically but in a matter of a few days it runs bad. What could the problem be??

@ClassicGBodyGarage

4 жыл бұрын

Sounds like someone messed with the power valve adjustment. Check out quadrajetpower dot com and they have adjustment numbers on their site.

Great Video!!!!! THANK YOU!!! I'M getting ready to do my 1963 buick skylark Rochester Quadrajet 4BC. THIS SHOULD MAKE IT A BREEZE... TY

its like a puzzle that kicks ass and helps you go fast.

Dude thank you so much for this. I'm rebuilding a Qjet for my Pontiac 400 right now. My local Napa did have the carb dip. HOWEVER! The carb body sections are slightly too big for the 1 gallon pale. Had to find a shoebox sized Tupperware container to soak everything in.

@jookker67gamingvwrepairing24

4 жыл бұрын

Good to know was jus about start tearing mine apart to clean it an would if been stuck thanks for this

@ClassicGBodyGarage

4 жыл бұрын

Glad I could help

Great video, really appreciated the tips and tricks. Got an 85 C-10 with electronic choke quadrajet. Fired up in about 5 seconds. The rebuild fixed a number of problems.

@ClassicGBodyGarage

9 жыл бұрын

Robert Hall Hey there. Glad the video helped you out!

Excellent, clearly-expressed, very thorough video! Thank you.

@ClassicGBodyGarage

4 жыл бұрын

You're very welcome!

Cheers for the demo it was very helpful. Cheers Kimbo west Australia.

Very good video he made it look easy very detailed thanks for sharing

Thank you for this! I'm getting ready to do 2 Rochester Quadrajet carbs for my boat.

@ClassicGBodyGarage

2 жыл бұрын

Nice! good luck!

Took one of my carburetor’s apart from my old Buick and the metering rods weren’t even in there running super RICH before I changed it out now waiting on a rebuild kit so I’ll have a good spare

Super good video man Got my old truck running Woulda been up shits creek without this video

Thank you for the time you spent to make this video. Very well detailed. Helped a lot. Sure it wasn't easy with having to explain and record this project. Probably would've took you 1/3 of the time to do this.

@ClassicGBodyGarage

8 жыл бұрын

haha very true. It takes a long time to make and edit a video like this.

Overhauled hundreds of these, good detail on what to look for and how to do it right.

@ClassicGBodyGarage

4 жыл бұрын

Thank you !

Hey! Thank you so much for making this tutorial. Just rebuilt my first quadrajet for my ‘86 g20 van. I was a little hesitant to take this on but your step by step instructions were invaluable!

@ClassicGBodyGarage

6 жыл бұрын

Love to hear how my videos have helped people out. Thanks for watching and for your comment.

@josephclark567

9 ай бұрын

Hey man! I got an 80 G20. You think the process is the same?

Very good job n smart knowledge , it's really excellent demonstration I had learned a new experience Thanks alot

@ClassicGBodyGarage

Жыл бұрын

Glad to hear that

Thank you all for taking the time to watch my video. By the comments below it has helped many people. Please check out my channel for more how to videos. Thanks!

@johndawd4616

7 жыл бұрын

Can you help me out please ? i have a question , please reply as soon as you can .

@ClassicGBodyGarage

7 жыл бұрын

What do you need help with?

@johndawd4616

7 жыл бұрын

I was working on my hitachi dch306 but i don't know about the primary jet {slow} and the secondary jet {slow} , and they go a long way down and then there's a short screw that comes above them to cover them up , anyway my question is should i screw them all the way down , or should i screw them all the way down and then screw them up few turns and not all the way down ???? my air mixture screw stopped to have any affect on the carburetor after i have put it back after the rebuild , so can it be the reason is because i should not screw them all the way down and should back them few turns up ????? Classic G-Body Garage

@ClassicGBodyGarage

7 жыл бұрын

I am not familiar with a Hitachi however If the mixture screws have no affect on the carb and the way the engine runs then there is an issue. Turn the mixture screws all the way and DO NOT tighten them or you will ruin things. Back them out 2-3 turns to start with and adjust from there.

@johndawd4616

7 жыл бұрын

Classic G-Body Garage Thank you for your reply , the mixture screw have no affect at all , if my float level is way up high , would it affect the mixture screw in a way that would prevent it from mixing the air with the fuel ?????

Such a good tutorial. Dunno what i woulda done without you man. 77 Scottsdale 350 checking in, bout to drop this freshly rebuilt carb on top!

@ClassicGBodyGarage

4 жыл бұрын

Glad to help

Awesome video and awesome teacher. Thanks.

Nice video,very thorough,Rochester Quadrajet,though complicated is by far the best 4 barrel carb ever and when tuned properly is the best in smoothness,power and economy,my other favorites are the Autolite 4100,Holley 4011 and Motorcraft F-2,but I'm using Quadrajets in everything for the past 35 years even in big block Fords and the results are always gratifying.I'd like to add a couple things you must do after installation besides what you already showed in the video:1-You have to adjust the idle mixture with a vacuum meter and engine running.2-You have to inspect the area below the secondary metering needles for cracks and distortions,if so you got to correct it and it's not easy.3-And once is up and running,all warmed up,you gotta debog the second stage.After that it's all good.Also I'd like to point out this new Summit carburetor is very good,not as sophisticated as a Quadrajet,but inexpensive,simple and it appears to work very well in some specific applications like Ford 289-302

@ClassicGBodyGarage

8 жыл бұрын

+peter455sd Hey peter455sd thank you for the reply and the additional tips! I do need to get myself a vacuum gauge for proper tuning. I am not sure what you mean by "debog" though. Can you explain. Also are you referring to the Summit Quadrajet?

@peter455sd

8 жыл бұрын

+Classic G-Body Garage No I'm talking about the Summit square bore www.summitracing.com/parts/sum-m08600vs?seid=srese1&gclid=CJaViOaD-csCFcNahgod60gC7A Now regarding to debogging it's basically adjusting the rear metering screw that controls the second stage opening in order to cut the gap between primary and secondary response under full throttle,it usually takes 4 passages,sometimes you gotta drive around for a couple days.I say 4 passages if you have stick shift if it's auto,assuming the kick down linkage is in good standing,you have to drive around for a couple days and fine tune the thing.Sometimes,something I never understood,the rear needles are not the right ones for the carb,too thin or too thick,i believe at some point Holley sold a tweak kit with several of those needles,but I never seen in-store.Anyways,once you do the debogging you reach maximum performance and economy.

@Classic GBody Garage, Thanks! 6 years after being published and it's still super helpful! 2 Questions... 1. Where can I find a replacement Secondary Metering Rod Holder Screw and a Choke Cover Retainer Screw? 2. How can I get a broken (headless) screw out of the Choke Housing Assembly? It was rusted and broke off when disassembling...

@ClassicGBodyGarage

3 жыл бұрын

quadrajetparts dot com and use a drill or buy an new housing from them

great rebuild video thank you. i usually rebuild the hollys and carters/edelbrocks but wanted to keep this one original down the the c

@ClassicGBodyGarage

4 жыл бұрын

Glad I could help

this brought back fond memories for me, thanks.

Hi. This video rocks. I'm going to dismount/remount the carb on my Vette 71 with a friend this saturday. Using your step by step video. Wish me good luck :-) Leonard, in Belgium

@ClassicGBodyGarage

5 жыл бұрын

Awesome! Have fun with the rebuild!