was able to stop harmonic balance but still no luck. I was trying to replace my timing belt tensioner but now my timing belt has broken and i still can not get the crank shaft bolt off. any idea's? besides dynomite

Put the socket on a long breaker bar and with the other end on top of the frame then bump the starter.

I used a pipe wrench with a pipe extension to hold the pulley. I then used a breaker bar with another pipe extension on the bolt. My daughter pushed on one while I pushed on the other. Incredible feeling when it breaks free!