Whoah! Just after I added the glow plug oil and put the plug back on, I gave the engine a pull and then a whole bunch of bubbles appeared around the glow plug!!! The plug is properly installed, firmly but not overtightened....coming to think of it, I did notice this before once when I was pulling the starter.

Any ideas? The engine is working perfectly, but I want 2 know what this is!
The washer that goes on the glow plug, this isn't directional is it?

--Matthew