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How to rebuild a Rochester Quadrajet part 3

Finishing up the disassembly.


 


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How to rebuild a Rochester Quadrajet part 4





How to rebuild a Rochester Quadrajet part 2
Continuing the disassembly process.





How to rebuild a Rochester Quadrajet part 5





How to rebuild a Rochester Quadrajet part 6





How to rebuild a Rochester Quadrajet part 7





How to de-bog your Quadrajet part 1
Sorry guys, I got the videos a bit out of order. The Rochester Quadrajet has gotten a bad rap over the years, often called a Quadrabog or Quadrajunk. In fact, this is a great multipurpose carbureter once you understand how they work and what not to do to them. In this clip I introduce you to the Quadrajet and begin explaining the theory of operation of these units. Enjoy!





How to rebuild a Rochestor Quadrajet part 1
Introduction and beginning the disassembly process





How to measure and adjust Quadrajet float level
I have had several requests for this, so here you go: 1. The airhorn has to be removed to do this, but the carburetor does not have to be removed from the engine. 2. Some data says to measure from the toe(end that is opposite from the hinge), some say 5/16 inward from the end, etc. I suggest following the specs for your particular carburetor. 3. With the float in the raised position and the inlet needle lightly seated, measure from the top of the float to the top edge of the carburetor with NO gasket in place. If you have to adjust the float, bend at the area that has the cutouts, 4, If you are experiencing flooding issues then it is an excellent time to install a new needle/seat and float and that should cure flooding problems that are not choke-related.





750 vs. 800cfm Rochester Quadrajets-how to tell them apart
There exists a ton of misinformation regarding the actual airflow capacity of the Rochester Quadrajet. Not many people know how many variations there are or how to tell them apart. Here is a simple video explaining how to identify each size based on casting design. I will cover the "cfm-limited" carbs in a separate video.





Decoding a Rochester Quadrajet part 2: Breaking down the numbers
In this clip we'll learn how to decipher the Identification number and julian date code on the Rochester Quadrajet.





Rochester Quadrajet
The last thing to be looked at on the wagon, but really, no old car project is ever done, things keep being played with and adjusted. This is a correct Rochester Quadrajet 4-barrel carburetor I got some time ago, and has been renewed with new seals. The bushings and other hard parts were in good repair, so with the new seals. T o note, I called out the first three serial numbers as being "701" when in fact it starts with "704" . When building up a Rochester, one has to understand they can't just throw parts into it, they may be unhappy with the results. They should also be ready to have to change a jet here, a metering rod there, a spring or two after the unit is on to get the car running perfectly. The Quadrajet is a sweet carburetor, once you understand it a bit. As I am doing. It is running well, but will need a bit more tuning in the way of a stiffer primary metering rod return spring. Other then that, the car has more bottom and top end power, mid range is the same, but the bonus is, fuel mileage has picked up, the leaky bowl of the old unit is gone!





Quadrajet air leak fix and warped air horn repair tutorial.
How to identify a Quadrajet with a warped air horn without diss assembly or running it on a car. These tips would have saved me time and money which is why I made this video. I also discus how to repair a warped air horn and prevent your air horn from warping in the first place. If you have a whistling noise just off idle then you got some work to do. You will never get your engine tuned right, your cold start performing or decent fuel economy unless your four barrel carburetor is just right. Special thanks to Cliff Ruggles for his book Rochester Quadrajet carburetors and to my brother Adrian who spent hours on tuning and fitting. See this video for description of the technique I used to straighten a warped air horn. http://www.youtube.com/watch?v=l_SgQiVf3_0&feature=youtu.be here is a technique for re-bushing the throttle shaft without drilling. http://rmcavoy.freeshell.org/Q_Jet_bushings.html





How to adjust Quadrajet/Dualjet fast idle
Quadrajet/Dualjet Rochesters have a fast idle adjustment screw that is separate from the base idle screw.Here's how to locate it. NOTE THAT THE CHOKE ITSELF MUST BE WORKING IN ORDER FOR THE FAST IDLE TO FUNCTION.





How to rebuild a Rochester Quadrajet part 8





re-jet your Quadrajet (part 1)
rejetting a quadrajet





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