Pulling a harmonic balancer is the process of removing the harmonic balancer from the crankshaft of an engine. The harmonic balancer is a large, heavy pulley that is attached to the front of the crankshaft. Its purpose is to dampen torsional vibrations in the crankshaft, which can cause the engine to run rough and damage other components. Pulling a harmonic balancer requires specialized tools and knowledge, and it is important to follow the manufacturer's instructions carefully to avoid damaging the engine.
Pulling a harmonic balancer is often necessary when replacing the timing belt or water pump, as the harmonic balancer must be removed to access these components. It can also be necessary if the harmonic balancer is damaged or worn out. A damaged harmonic balancer can cause a variety of problems, including: