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Carburetors We Rebuild

Rochester Carburetors

Chevy and GMC Trucks 8CYL ( 4BBL ROCHESTER ) QUADRAJET 
1978-80 
350 CID 400 CID 
ROCHESTER QUADRAJET

Rochester carburetors were used as original equipment on Chevy and GM trucks and cars. Rochester carbs were used in a broad range of engine sizes offered by GM. The carburetors had multiple designs - from the most popular Rochester quadra-jet carburetor, to Rochester Mono-jet carburetor, and the dual jet carburetor.

Over time, the Rochester evolved from basic mechanical, to carburetors controlled electronically by the vehicle's on board computer systems.

One of the main variables of Rochester carburetors used on the various GM product lines that include Chevy, Oldsmobile, Buick, Pontiac Cadillac and GMC is the throttle linkage configuration. Generally, the linkage differs by product line. Rochester truck carburetors are usually different from car carbs even if the engine size is the same. Rochester carbs have numbers identifying numbers stamped into the body of the carburetor. They are either a eight digit number that starts with "17XXXXXX" or a seven digit number that starts with "7XXXXXX". Look for the number on the body of the carburetor. It may have similar numbers stamped on the base or top, the number on the body will more accurately identify the carburetor.

Original equipment Rochester carburetors are no longer available new. Remanufactured Rochester carburetors are available on this website for most applications.

A common problem on other Rochester remanufactured carburetors is wear on the throttle shafts that can cause fuel or air leaks. This issue can be overcome by inserting bushings to that the play out of the throttle shafts creating a tight seal. This process requires special tapered drills. Always make sure that the bushings are being replaced when you buy a remanufactured Rochester carburetor.

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