The harmonic balancer (crank pulley) on C5 and C6 LS engines can develop a visible wobble. It happens when the rubber ring between the hub and outer ring breaks down, or when the balancer has moved on the crank snout, often after a previous repair or pulley swap. A wobbling balancer can throw the belt and, if it has moved, can point to a deeper crank problem.

A plain-English tour of all eight Corvette generations, what changed between them and what each one is like to own today.

Camber, caster and toe in plain English, why Corvette alignments matter, and how street and track settings differ.