harmonic balancer
Engine component definition useful for mechanics
The main drive pulley of an engine; mounted on the fromt end of the crankshaft. Harmonic balancers are weighted to keep the crankshaft balance in order to reduce vibration.
Frank: The dang harmonic balancer is frozen to the crankshaft! Allan: Probably gonna have to use a harmonic balancer puller, Frank. Frank: Wow! They actually make those?! Allan: Yep