Originally Posted by painted jester
Whoever? may have installed high pressure oil rings with too coarse a hone! different rings some cast, cast molly, steel molly, chrome, racing rings, etc) are honed with different grit stones and some cylinders are even polished, cast ring cylinders are honed finer and steal molly a little coarser etc,etc! high pressure oil rings will wear fast on rough honed cylinders! Thats only one of the causes among meany! And remember Im old so ring technology may have surpassed what I knew and still practice but myself I still hone cylinders different for different ring material and pressures. And cylinders need to be honed for ring break in after boring And a ball hone for deglazing wont do it!!
A lot of older engines had oil holes in the connecting rods that sprayed oil on the cylinders for piston wrist pin and ring lubrication and the oil ring spread and wiped the cylinders and on some connecting rods those oil holes are not machined in!
Ring gaps will cause many problems like you have and ring gaps must be precise! Most rings out of the package have gaps too wide especial when bought cheep for savings!!! I get file gap rings and pay bigger money for better precession and quality But its money well spent for something so impotent! Gas wash usually wears out the top ring, The second and oil control ring get more oil lubrication then the top compression ring So my guess is your second and oil control rings weren't getting good lubrication!
Just a guess ? Jester
I see you haven't been back on! But someone else may be interested that doesn't know so I added these pics!
These are pictures of the oil passage in the rod cap ,and the hole in the old inserts, and new inserts with no hole That need to have the hole added for proper lubrication! You can do this with a fine machinists file and be careful not to hit the insert surface or scuff it with the file and clean it before installing!