Toyota Repair Problems? Ask a Mechanic for Answers ASAP
Did you replace the valve seals with the factory Toyota seals? Did you hone the cylinders at all? Did you do a wet dry compression test to confirm if it is leak by past the rings or the leak down compression test?
I am not a fan of chrome or aftermarket piston rings. Too many issues. When you said you cut the ring Ridge and then hone the cylinders that would indicate there was an excessive amount of cylinder wear. Was the crosshatching still visible on the cylinders or Was there a spot where the crosshatch was worn through?