RE: Can't Get new Enging to Turn Over
ABC stands for A aluminum piston, B brass piston sleeve, C chrome ware surface.
ABN stands for A aluminum piston, B brass sleeve, N nickel ware surface.
AAN stands for A aluminum piston, A aluminum sleeve, C chrome ware surface.
ABN can also stand for A aluminum piston, B brass sleeve, N nikasil ware surface, nikasil was developed in the 60's for use in wankel engines because it causes much less friction the cast iron allowing the nikasil coated rotor housing and the aluminum rotor to contacted directly without much friction or ware, but ended up being used extensively by Porsche in there high performance 911 models and racing cars, Ferrari and Maserati in a few select limited production cars also by BMW, Jaguar, Honda H sires and in some mopeds.
all types have a taper in the piston sleeve, i'm not trying to start an argument but i'v done my research.