The Stovebolt Site Forums The Shop Area Engine Shop Vacuum advance replacement

I want to clean up/replace/rebuild the vacuum advance unit on my '40 truck engine. Would someone please walk me through the removal of the vacuum advance unit? Do I need to remove the distributor to remove the vacuum advance unit? What about the adjustment unit mounted under the grease cap and between the vacuum advance diaphragm and the distributor? Can it be removed and cleaned up without distroying the timing? If I have to remove the distributor, how do I do this? How do I keep the timing relatively close to what it is as the motor runs.

Thanks to all.

CAB

Remove the vacuum line, remove the two nuts holding the unit to the bracket, remove the nut/bolt holding the advance lever to the distributor (those three steps can be in any order). The vacuum advance is then ready to remove. Replace in reverse order. No muss no fuss no changing any setting.

Tiny:
Thanks. I'll give it a try over the weekend. Can I replace just the diaphragm or do I need to replae the entire assembly?

CAB

It's possible the rebuild them but I don't know how it's done. Have the new unit with you before trying to remove the old one. It'll be a guide as to how it's connected for a first time project.