vacuum break control assembly

[William S.]

I am looking for what my Rochester manual schematic diagrams call a vacuum break control assembly for a 4MV carburetor on a 1969. It is a plastic disk on the front right of the carburetor that has split open. I think it has a spring inside because I saw it was broken when I found a spring lying on the intake manifold and took off the air filter to look.

I can't find a part by that name from any of the corvette suppliers I generally go to. Is there another name for this part?

Thanks.

[William C.]

Re: vacuum break control assembly

GM parts books call it a "control Assembly, (parts group 3.755) also referred to as a "choke pull-off"

[Joe L.]

Re: vacuum break control assembly

I am looking for what my Rochester manual schematic diagrams call a vacuum break control assembly for a 4MV carburetor on a 1969. It is a plastic disk on the front right of the carburetor that has split open. I think it has a spring inside because I saw it was broken when I found a spring lying on the intake manifold and took off the air filter to look.

I can't find a part by that name from any of the corvette suppliers I generally go to. Is there another name for this part?

Thanks.

William-----


The GM piece for your application is discontinued. However, it's easily available in the aftermarket. The NAPA/Echlin part number is CRB 24728. The Standard Motor Products part number is CPA 38. If your failed piece is original, the replacement will likely be a different color plastic but will be otherwise very similar to the original in configuration. Even GM SERVICE pieces, when they were last available, were different colored plastic (gray) than originals (usually "yellowish" or "light cream" colored).