Balance issues

Unfortunately I don't have any pictures the motor sounded fine oil psi on mechanical gauge was 70. Motor died at about 15 minutes on its own pulled drain plug and nothing but strings and glitter mixed with oil came out. I tore the whole thing apart. Oil pump turns fine. The only parts of the cotter pins I could recognize were melted looking. But the size you would use on a pitman arm! And the filler they used on the crank appears to be falling out from balancing it