Originally Posted by
timsrv
...........If after that the timing mark is way off of TDC, then you'll need to pull the crankshaft pulley and make sure the woodruff key is there and intact. If the key is intact and the keyway looks good, then it means the outer part of the pulley has slipped on the rubber insulator (meaning you will need to replace the pulley). Keep in mind that it's not too unusual to have problems with the woodruff key on these. If it has broken (allowing the pulley to slip) and you run it for too long, the end result could be destruction of the crankshaft.............