Re: 1951 200 Business Coupe Vacuum Advance Source

Posted by Owen_Dyneto On 2022/8/16 17:12:29

If you have a choice I'd choose a rebuilt unit over an NOS or NORS unit. Even with ideal storage the rubber diaphragms in these old units are more and more regularly exhibiting age deterioration with resultant very short service life.

If you need to return your old unit, don't forget to retain any fittings and the spring and shims. These parts put a load on the diaphragm specific to the requirements of your particular engine.