65 273 Oil in dual point vacuum advance.

[chewy]

Never seen this before on any of my mopar distributors in the past.

When I rebuilt the carb a couple weeks ago, 20+ years after the last rebuild, as I was tuning it, I noticed the vacuum advance wasn't working like it had been. Was only getting about 30 total advance, which I used to be getting around 35.

I replaced the vacuum advance around 2011 with an NORS one that I had found. It had quit working, and was due for the 50+ year old distributor. Upon finding the issue, I got a rebuilt one from @halifaxhops , opting for the newer innards, vs 60 year old rubber in an NORS.

Changing it out today I found oil in the vacuum advance on the spring/front side. Doesn't smell gassy, like it would if it came from the PCV valve. The distributor side of the it has no oil. No oil in the base of the dual point distributor either. No oil in the PCV vacuum line and no trace of oil in the distributor vacuum line.

A little stumped as to where it might have came from. Would like to prevent it from happening again

Thoughts??

 

[4spdragtop]

There should be a "sponge/felt" piece i believe to prevent that.

 

[chewy]

There should be a "sponge/felt" piece i believe to prevent that.

I've not rebuilt the distributor, the felt ring is on the inside according to the parts diagram. There isn't any oil in the distributor, only on the outside chamber in the advance.

 

[cudamark]

All the liquid I've seen in a vacuum advance servo was petroleum distillates from gasoline in the carb. Putting a loop in the hose from the carb port so that it stays above that port should keep any further liquid from flowing down into the vacuum advance and rotting it out.

 

[chewy]

All the liquid I've seen in a vacuum advance servo was petroleum distillates from gasoline in the carb. Putting a loop in the hose from the carb port so that it stays above that port should keep any further liquid from flowing down into the vacuum advance and rotting it out.

Thanks Mark! Will do that. Picking up new vacuum line today.