QuadraJet 702 Carburetor Rebuild

[@musclecarmitch908]

Awesome video! Great detail! your videos will be great to come back to every time I work on a Quadrajet in the future! Thanks for making these videos, they will be such a great help for us!

[@76vette]

Thank you for watching as well as the kind words. I was missing a 702 for the 702/704/1705 trifecta. Not anymore! Lol 😆

[@musclecarmitch908]

@@76vette 👍

[@AlvaroRCRosa]

Parabéns! Gratidão sempre Eu Sou!

[@ElvinLeadfoot]

We did not get to see the repair of the primary throttle shaft bushings. The broken screw & reassembly:) The most dramatic part.. As said at the fuel desk in Philadelphia. “The first time is always dramatic.”

[@76vette]

kzbin.info/www/bejne/mqCnaqSve9KpgZY kzbin.info/www/bejne/sGHXl4GBYsmcfM0

[@anthonycammaroto7013]

Thank u I have the AIMS book and service manual but cannot find FT torque pounds for bolt down to manifold thanks

[@76vette]

You are welcome. Glad to help. 😊👍🏻

[@samburk45]

At 39:53 when you said you got this all buttoned up. For the life of me I can’t figure out the orientation of the first round spring, or the second that doubles as a retaining clip!

[@76vette]

I think this video may help clarify how the springs are installed. 😊👍🏻 kzbin.info/www/bejne/hoGzeImYdqtqnpo

[@metalgarageit]

I'm waiting for a rebuild kit for mine and this video will be GOLD, thank you! Did you have some trick to replace the idle tubes too?

[@76vette]

I did not remove or replace the idle tubes. However, I cleaned them as much as possible using wire strands as shown in this video: kzbin.info/www/bejne/navCYoWHpZiqrZY They can be removed, of course, if necessary, and there are several videos available that show that approach, which basically involves a coarse-thread screw to bite into the soft metal so you can pull the tubes out. I think running the right gauge wire through them and plenty of carb cleaner can be just as effective. Good luck with your rebuild and I hope you’re happy with the results. And thank you so much for watching! 😊👍🏻

[@metalgarageit]

@@76vette problem is that I have a '68 vette 327/300 with a quadrajet that is an old/unknown rebuild and not the exact fit for my application (7028213 vs 7028207 from spec). I already got some problems like lean idle and poor response to adjusting screws, so since now it is flooding due to worn gaskets (I live in EU and here we have mandatory ethanol) I'm taking the occasion to change the idle tubes with a .040 pair to see if it can run better. I knowed the coarse-thread screw method but, since I want to do less damage possible to the old ones, I was wondering if there was a less aggressive way

[@76vette]

@MetalGarage Unfortunately, the only method I know of is to use a screw to pull them out. The only real damage would be some scarring inside which can be pretty much eliminated by running a micro drill bit through the jet. This kit here is almost identical to the one I have and it may be a good investment for you. amzn.to/3Ua8nt0 Also, if you are planning on replacing the original tubes then any potential “damage” to them should not be a concern, unless you are planning to reuse them at some point. Just a thought.

[@metalgarageit]

@@76vette I would like to save the old ones just in case the new .040 will run too rich. I will be careful.Thanks!

[@76vette]

Also make sure your carb has the right jets, metering rods, and idle mixture screws. The guys at quadrajetpower.com will sell you a complete rebuild kit specifically calibrated for your application. Good luck! 😊👍🏻

[@anthonycammaroto7013]

Hi could you please tell me the torque specs on the 4 mounting bolts on carb to intake , also is there a torque spec for the top horn screws. Thank you

[@76vette]

From the 1981 Shop Manual… (I think they’re all pretty much the same) “CARBURETOR MOUNTING TORQUE When torquing carburetor after removal, overhaul, replacement or when installing a new heat insulator, torque mounting bolts, in a clockwise direction, to 16 N•m (144 in. Ibs.). When retorquing carburetor at recommended maintenance intervals, check in a clockwise direction. If less than 7 N-m (60 in. Ibs., retorque to 11 N.m (96 in. Ibs.); if greater than 7 N•m (60 in. Ibs.), do not retorque.” As far as the air horn, it just says to “tighten all screws evenly and securely using the screw tightening sequence” starting with the two countersunk screws inside the choke Venturi, followed by the inner secondary screws all the way to the back of the carb, then two outer middle, then two outer rear, then front screws. This information is why I sound like a broken record when I say that you MUST have as many books as possible if you’re going to wrench on these cars. 😊👍🏻

[@poumization]

Very interesting and useful ! I have a '69 427 from a Corvette in the chevelle I just bought. Do you happen to know how to connect the vacuum lines to the distributor, carb etc? It seems that what is on mine is not all hooked up. Thanks

[@76vette]

The distributor vacuum advance uses one vac line that needs to be connected to a ported vac port usually located at the front of the carburetor body. If there are unused carb vacuum ports (ported or manifold), you want to plug those properly. Good luck and Thank You for watching! 😊👍🏻