Don’t even THINK of using the edge of the flywheel type puller’. They are known to distort the flywheel and in some cases pull off the major portion while leaving the hub attached. In the cases where there is no threaded holes a crankshaft “knocker” is used. This “Special tool” consists of a longer flywheel nut that is used to protect the end of the crankshaft. It uses the end play of the shaft to remove the flywheel. It screws down against the crank and you lift the flywheel while hitting the nut with a hammer. The factory tool bottoms against the taper and has the bottom diameter reduced to clear the flywheel. Some use the flywheel nut just loosened to the end of the crank. This can distort the threads if hit to hard. Many use two regular nuts held together with a short screw. Although it protects the top threads from damage, if not hit squarely, this can knock the threads off the crankshaft. It is important to lift the flywheel so the crank has some place to go. Otherwise the force will be against the crankshaft and may distort it and cause bearing problems.
