Any recommendations on the long term storage of an un-installed O-360? Can't run an uninstalled engine so the Lycoming SB isn't alot of help. I did use the Tannis engine protectant kit and used Phillips rust protectant oil. I heated the oil and filled the crankcase full then drained the oil and treated the cylinder walls. I installed desiccant plugs and desiccant packs in the intake throat, all openings plugged. The engine was horizontal when I did this so I could use the crankcase drain to drain the oil. The engine is currently vertical on an engine stand. I figured the inside oil coating will eventually drain off and am thinking it's time for another coating. I note a large set screw on the forward right side of the case but I can't find any reference to this set screw in my parts manual. I was wondering if this is just a drain and I could refill the case with oil and then drain it out via that set screw. That would eliminate the need to get the engine horizontal again to drain the oil. This engine will be in storage for at least another year.