I'm rebuilding a 346xp and was pressure testing it. It had about 1/2 psi leak over about 5 minutes. I got soap water and a brush and put it around all the common leak points and didn't find anything. Put it around the crankcase gasket and found it. So, I dirkoed the gasket around the crankcase. Is air able to leak through the paper, or maybe just not a good seal? I used brake cleaner on a shop towel in both sides and applied a little dirko with my finger. These should hold pressure with no dirko, let alone adding it. Any thoughts?