DustyBin
Established Member
hmmmmmmmmmmmm yes. YES - the oil scraper ring. Of course! I should have seen it sooner. it is CLEARLY allowing oil to bypass into the combustion chamber.
( i have no idea what that is or does)
In very simple terms, it stops oil entering the part of the engine where the fuel and air mixture is burnt. The oil is pushed (or scraped) back down the bores as the piston moves downwards on each intake and ignition stroke (in the case of a four stroke engine).