How to rebuild a Rochester 2GV Carburetor - a pictoral essay... I'm starting this thread because I noticed (after my third rebuild of a Rochester 2GV) that the instructions in the official 1968 Buick Chassis Service Manual are rather terse. All of fifteen paragraphs; just one page of instructions and no pictures. I know two-barrels are simple, but I think that's a bit too little. The instructions that come with a carburetor rebuild kit are even less. An exploded diagram and a sentence or two ("Disassembly: Use exploded view as a guide - Reassemble in reverse order"). Not much to go on for the first-timer. ********** So, you've decided to rebuild your Rochester 2-barrel carburetor. Maybe yours is giving you problems, or is leaking gas, or you want to clean it up, and you simply want to. Whatever the reason, it's not that difficult. The pictures that follow detail a Rochester 2GV as found on my 1968 Buick Skylark 350. However, all Rochester 2-bbls are very similar mechanically and differ primarily in choke mechanisms and venting details. That's not to say they're all interchangeable or that parts can be swapped. But if you're rebuilding a lone carburetor, this guide should help.