Posts Tagged: OAD

How to replace an alternator decoupler pulley

Learn how to replace an Alternator Decoupler Pulley (OAD) or an Overrunning Alternator Pulley (OAP) The alternators in many late-model vehicles are equipped with either an overrunning alternator decoupled (OAD) pulley or an overrunning alternator pulley (OAP). Both pulley styles are designed to allow the alternator to decouple from the drive belt, allowing the alternator to free-wheel during engine deceleration. However, the two styles are designed differently and are not interchangeable. So, when the pulley fails, it’s important to replace it with the correct type. How to replace an OAD … Read More