After two gallons of cool power 30% & apc 18*6 W & venturi restrictor, my DZ lost compression after landing today. Some of the bolts that holds the cylinder head were loose, in fact, one was almost out. I re-adjusted them but compression still lost ( I have another dz, is easy to compare). Could you please tell me how to solve the problem here at home (the engine is almost new, it must be something very simple) or I do have to send you the engine for checking? I adjusted all screws that are visible, but the compression it is not back.
Thank you