[RoughSilver92]

Well, I can't answer about the wear on the bottom, haven't tore that far into one yet, but I doubt it wears any faster. Now on the timing belt lines, those will only line up every X number of rotations(where X equals some fancy equation of teeth on the gears and teeth on the belt). This is easily noticed when you turn the crank 2 full rotations and confirm your timing marks still line up, and the lines on the belt are magically somewhere other than on the timing marks.