What does a Slipped Harmonic Balancer affect?

A slipped harmonic balancer primarily affects crankshaft timing. The harmonic balancer, which is attached to the front of the crankshaft, serves to minimize engine vibrations and maintain proper timing of the engine's components. If the balancer slips, it can disrupt the synchronization between the crankshaft and the camshaft, leading to potential misalignment of timing belts or chains. This misalignment can cause incorrect valve timing, leading to performance issues, reduced engine efficiency, and, in extreme cases, engine damage.

While other components such as cylinder compression, oil pressure, and fuel efficiency may be influenced by a variety of factors related to engine performance and health, the most direct and immediate consequence of a slipped harmonic balancer is indeed the impact it has on the timing of the crankshaft.