So THEY decided Hyundai made a mistake by putting in a balance shaft??? And somehow they can remove the balance shaft and now it's BETTER? What's wrong with this picture? For my two years on this forum, no one ever said the balance shaft was a PROBLEM. The problem comes with people not changing the balance shaft belt so it breaks and messes up the motor. So my guess is the belt broke on this motor and messed it up good. I think I'd be asking for my money back for this OBVIOUSLY incomplete motor.