How to rebuild a rochester quadrajet 4mv carburetor. Rochester quadrajet carburetor rebuild kits carburetor. First, download your free carb manual thanks to mikes carburetor parts. The qjet is a very capable but often misunderstood carb. The model 2g was equipped with a manual choke and was. Carburetor manuals for american cars, trucks, boats and machines. Rochester quadrajet accelerator pumps have a plastic end which is often broken or damaged. Proper adjustment of the airtofuel ratio of a rochester monojet is important for maintaining the efficient operation of. It has been proven to be dependable and a versatile performer as witnessed. Rochester b rebuild the rochester b was very popular back in the day and many versions of the rochester b are available.
The manual is in two formats regular html pages with jpeg images of the scanned pages and pdf files. Remember that the only thing that keeps it well vaporized at idle is the high manifold vacuum produced by the closed throttle plate. Acdelco 19250956 professional carburetor repair kit with ball, clips, gaskets, screws, and seals. New rochester quadrajet 4 bbl carburetor, 305350 engines 650 cfm electric edelbrock carburetor adapter kit afb 4 bbl carb to quadrajet base manifolds. Important safety notice proper service and repair is important to the safe, reliable operation of all motor vehicles. Canadas source for quality carburetor rebuild kits, choke pull offs, choke coils and floats. It was produced in many forms, including electroniccontrol from 1980. Rochester carburetor haynes techbook haynes repair manuals. Supersedes 9d5 models 4mv4mcm4mem4m c dated may 1973. Rochester bc published in 1951 rochester dualjet carburetor manual rochester e2se carburetor manual rochester e4mee4mc service manual.
First released in 1975, the m4me models differ from the conventional 4mv4mc carburetor models in that. The 2 ahead of the g means the carburetor has 2 bores, 2 venturii and 2 separate but identical metering systems, one for each carburetor bore. You will also find detailed service manuals for specific. May 3, 2003 this manual covers all rochester qjet carbs including the 4mv, m4mc. From street restoration to full race carb tuning, parts to quadrajet rebuild instructions, we have it. Holley 2300 carburetor rebuild manual from a 1962 repair manual. A quick internet search revealed that we had a rochester 4barrel carburetor with a manual choke that met california emissions standards. The carb worked flawlessly the first time, thanks to this book. If you are looking to have a specific carburetor rebuilt please feel free to ask, were here to help.
Rochester quadrajet manual the old car manual project. This manual will show you, with words and photos, how to correct common problems associated with rochester carbs, overhaul your carb, perform repairs, and extract the maximum performance from your engine. Holley 1920, 1940, 1945, 2210, 2245, 5200, 5210, 5300 carburetor manual. The haynes book does a better job covering other rochester carbs, including a side by side guide for rebuilding the dualjet and quadrajet, though the side by side instructions can be confusing at times. Rochester quadrajet 4 barrel secondary lockout duration. Rochester 2 barrel carburetor oem, new and used auto. These carburetors are completely disassembled repaired cleaned and reassembled with new kits using ethanol resistant parts. Delco rochester there are three basic model g rochester twobore carburetors. Call 9707790233 rochester quadrajet carburetors quadrajet rebuilding service quadrajet carburetor bushing kit instructions quadrajet photo gallery unwarping service call before. Delco rochester delco rochester models 2g, 2gc, 2gv service manual rochester products division of general motors rochester, new york co, wd, 1,2. Tune up your automotive and marine rochester 4 barrel quadrajet carburetor with our usa made premium carburetor rebuild kits. Rochester monojet carburetors were used on many sixcylinder automotive engines and provided sufficient power to the engine while maintaining good gas mileage.
I was able to get through a qjet rebuild in a very measured, cautious six hours. To make restoring these great old cars easier, weve scanned in the entire rochester carburetor service manual covering the years 19321980 and were presenting it here for free. Your roch b may look a little different but for the most part, things are the same. Detailed quadrajet carburetor rebuild complete guide youtube. Unfollow rochester carburetor parts manual to stop getting updates on your ebay feed. New carburetor rebuild repair kit riding mower part for kohler 2475703 2475703s 49cc carburetor rebuild kit 5. Cm11 196165 buick, oldsmobile and pontiac 2gc small bore cm22 19551971 rochester 2jet small bore 114 cm42 19581969 rochester 2jet large bore. I bought this book, as well as the haynes rochester book just to cover my bases. Cm10 chevrolet b, bc car models up to 1956, trucks up to 1962. Your guide to the most popular rochester carburetors. Im like a lot of you shade tree restorers out there. Rochester quadrajet carburetor numbers 1708600317088152. Service manuals index by carburetor manufacturer and model. Our carburetor rebuild kits feature online exploded view instructions and adjustment specifications, quality gaskets, ethanol resistant accelerator pump components and hiflow needle and seats.
Rebuilding a rochester b carb deves technet home page. Rochester quadrajet chevrolet camaro chevelle truck 7043203 350 engine. Complete overhaul and rebuild instructions for the rochester quadrajet four barrel carburetor. The quadrajet fourbarrel carburetor was produced by the rochester carburetor division of general motors from 196590. Our kits have complete qjet accelerator pump assemblies including an ethanolcompatible viton cup. The quadrajet rebuilt in this video is of the 1979 era. Cliffs high performance quadrajet carburetor rebuild. All carburetors here are pictures of our actual rebuilds they are not new. This is a pretty easy process that only requires a straightslot screwdriver and a vacuum gauge. How to quadrajet carburetor rebuild part 1 removal and disassembly.
Some quadrajet carburetor designs vary from year to year however the process will be similar. It is easily identifiable by the words 2 jet on the air horn lid. Rochester quadrajet carburetor rebuild kits and parts. Except for choke systems, all models hav e basically the same principles of operation figure 1. Comprehensive factory service information for rochester quadrajet m4mc carburetors. Download manuals for carter, holley, autolite, motorcraft, rochester, stromberg, solex, marvel schebler, zenith.
Theres no need to spend a considerable amount of money on carburetor repairs when, with the right information, you can do the work yourself. There are two types of float needle valves used in the. This book, how to rebuild and modify rochester quadrajet carburetors, seeks to lift the veil of mystery surrounding the qjet and show owners how to tune and modify their carbs. Chevrolet parts carburetor rochester, 235ci 7004468 5051.
You will also find detailed service manuals for specific rochester carburetor types in downloadable ebook format. So the quadrajet is back together and ready for tuning. September 25, 2005 a searchable pdf version of the service manual has. The twobore carburetor is normally used on v8 engines where each bore supplies the airfuel mixture to four cylinders through a divide intake manifold. Includes theory, diagrams, detailed specifications, tuneup data and complete overhaul procedures. Supersedes 9d5 models 4mv4mcm4mem4m c dated may 1973 service manual delco. Carburetor manuals autolite, carter, ford, holley, rochester, stromberg, zenith and more aero coach. The clearance between the lower edge of the choke valve and the air horn wall should be 0. Rebuild instructions for rochester quadrajet carburetor. Removal, disassembly, rebuild rookie level the thread discusses the removal, complete teardown, cleaning, rebuild kits, rebuild process, reinstallation, and tuning of a quadrajet 4mv model. Order carburetor rebuilding kit for your vehicle and pick it up in storemake your purchase, find a store near you, and get directions.
Take lots of close up, well lit pictures of the linkages. The rochester quadrajet carburetor was found perched atop the engine of many a classic gm performance vehicle. Bend the diaphragm link, if adjustment is necessary. Here is one of brad allens slideshow presentations direct from general motors in 1952. Covers noncomputercontrolled varajet models up to 1987. Rochester carburetor haynes techbook haynes repair manuals mike stubblefield, john h haynes on. Rochester m4mc m4me carburetor manual complete service manual. Quadrajet s premium quality rochester quadrajet carburetor rebuild kits are superior to common auto parts store kits. The rochester quadrajet is a four barrel, two stage carburetor of down draft design.
How to adjust the rochester monojet carb air fuel it. Rochester quadrajet 4 barrel secondary setting youtube. The rochester 2g carburetor was introduced in 1955 and was used in various applications by all gm divisions through 1979. Details about rebuilt rochester 2barrel carburetor 2g 1950s chevy gmc truck manual choke. Cm26 ford flathead v8, lincoln v12 and ford 272 cid. Rebuilt rochester 2barrel carburetor 2g 1950s chevy gmc. The rochester 2g carburetor has two bores, two venturis and two separate but identical metering systems.
The procedures recommended by rochester products division of general motors an d. Tuning, repair, adjustments, overhaul, modifications. Hv diaphragm operated choke control with a choke thermo static coil mounted. This book,how to rebuild and modify rochester quadrajet carburetors, seeks to lift the veil of mystery surrounding the qjet and show owners how to tune and modify. With 73 years or experience, im sure we will be able to help you with what you need. Quadrajet rebuild kit, chevy 197680, gmc 198089, pontiac. Rochester bv 1bbl carburetor repair guide autozone. With years of qjet experience and hundreds of satisfied customers, our carbs are track proven and dyno tested. How to quadrajet carburetor rebuild removal and disassembly. The julian date code march 7, 1977 was correct for the year of the car, leading me to believe it is the original carb.