Interesting phenomenon, I have a weeping carburetor insulator on my 1950, 216. This is the original insulator, which was actually Bakelite and they probably used asmostus as a filler. The new ones are just a solid plastic, not Bakelite and they don’t look like they have a filler in them. I suspect that after 60 years some of the phenolic resin is breaking down and it has become porous.
I can clean the manifold and insulator with a solvent till both are dry before I take it out for a ride and when I get back this is what I have. The gasket is new, the nuts are tight, and there are no leaks in the carb throttle body itself or any of the plugs.
http://rides.webshots.com/photo/2711907900098611668LgfDym Denny Graham
Sandwich, IL
