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Now we can unbolt the vacuum diaphragm from the main body with three screws. Since this is a relatively simple mechanism, we won’t disassemble it for this rebuild. This particular style uses a quick-change cover that allows changing the internal spring without removing the whole cover. If you remove the entire cover, be very careful aligning the holes in the diaphragm with the cover screws. The thin rubber diaphragm is very fragile and will tear if the holes are not perfectly aligned. It’s best to leave this alone for now as long as the diaphragm works properly. Check for vacuum leaks.
Rebuild a Holley Carburetor

Now we can unbolt the vacuum diaphragm from the main body with three screws. Since this is a relatively simple mechanism, we won’t disassemble it for this rebuild. This particular style uses a quick-change cover that allows changing the internal spring without removing the whole cover. If you remove the entire cover, be very careful aligning the holes in the diaphragm with the cover screws. The thin rubber diaphragm is very fragile and will tear if the holes are not perfectly aligned. It’s best to leave this alone for now as long as the diaphragm works properly. Check for vacuum leaks.  View Related Article

 

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