Rhythmic smoke puffing out of oil input breather cap

[rotorwrench]

If it has a busted ring it will eventually score the cylinder & burn a piston. A person could do a single cylinder if it was traced back well enough as suspect. If it wasn't long since the last overhaul it could be deglazed an re-ringed on just the one bore. Usually all the cylinders will break in and all will have problems if it sets too long. Just one cylinder low make a person scratch their head for sure. Oil users can be brought back to life some times but compression is another thing. Sticky valves will cause a miss or intermittent flutter but it won't affect the crank case pressure. A good amount of compression is getting by somewhere if it's trying to make smoke signals out the filler tube.

[AnthonyG]

After checking cylinders from top side (Suspect cyl looked fine as did all on right side) replaced head gasket reassembled ran a few times & issue remained the same. Still had odd compression readings in #2. This will be a first for me on a Flatty, I’ll be removing the engine & putting on an indexing stand removing head on #2 cyl side again flipping engine 180 degrees to remove piston # 2. I don’t think it’s any different then other engines for this process but any experience otherwise is appreciated.

[big job]

back when I had a real job police dept. my detail was to run the generator each Friday night and switch the power for at least two hours 'work it'.. This generator a free WWII
army surplus free bee . It was a rabbit dist.so that says 59A; think it was around 10klwatt
It had a belt driven governor and ran about 1500 rpms. OD Drab green ran perfectly hour
meter around oh 500hrs or so. Bottom line Ya gotta run them. I ran that for my 25yrs
and I bet my life these new kids got rid of that for some new generack or something.
may have a broken ring ????? so my thoughts are to put your self in cold storage ok
and don't expect to get wake'd up after a long sleep to shovel snow...