Dayco® 892012 - Alternator Decoupler Pulley

Many modern vehicles have an increased amount of accessories that require additional electrical power such as heated and cooled power seats, GPS navigation systems, etc. This is why alternator loads and engine torsional fluctuations are increased. To solve this problem, overrunning alternator decoupler pulleys (OADs) are installed on many late model vehicles. The most common signs of an OAD failure are unusual drive belt noise and vibrations. You may also notice that the alternator doesn't charge the battery and pulley spins in both directions. The pulley can also seize. When it comes to its replacement, choose this Dayco product designed to ensure a precise fit and excellent performance. Thanks to its one-way clutching capability, the product isolates and dampens the drive from the alternator upon deceleration. This pulley also improves drive belt tension, reduces its noise and slippage during rapid acceleration or deceleration thus reducing stress on the drive belt resulting in prolonged alternator and belt service life.