my harmonic balancer/crank shaft pulley has come loose for the second time. There is a keyway on the crankshaft itself but no keyway on the pulley itself. there is a hole for a dowel, so i am just looking for some clarification on re and re the pulley.Since it came loose it rounded a bit of the outside edge of the where it seats so i am going to look around for a new/used one but i am still unsure what holds the pulley in place besided the main bolt.





