VIDEO: Flutter Noise Decoupler Replacement

VIDEO: Flutter Noise Decoupler Replacement

Has belt tension increased or decreased in the past 20 years? This video is sponsored by Continental.

I have a quiz for you. Has belt tension increased or decreased in the past 20 years? The average belt tension used today is lower with vibration control and the integration of the Litens OAD (Or overrunning alternator decoupler). As a result, less tension increases the life of the belt by slowing down wear.

This has permitted OEMs to extend replacement intervals past 100,000 miles on some vehicles. Also, with less tension, the amount of power required from the engine to turn the belt drive system is lower, improving fuel economy. With advent of newer technologies like alternator decouplers and better belt compounds, OE’s are able to reduce overall tension on belt drives that otherwise would have been higher had these new technologies not existed.”

Keep in mind that going from V8’s in the past to smaller displacement engines like I-4’s and 3 cylinders, have created the need for vibration control products. Otherwise you would have the need for really high tension to control the more torsionally active small engines.

Less tension increases the chances the belt system could flutter or slip when loads on the belt drive system change or the engine’s speed increases or decreases. To combat belt flutter, many OEMs have started to use components like decoupler pulleys.

A decoupler pulley can decouple the alternator from the belt drive system and help absorb small vibrations from the crankshaft that could produce belt flutter.

Decoupler pulleys are a “wear” item and on some vehicles, it is recommended that it is replaced along with the belt. Why? Inside the decoupler pulley is a spring which will fatigue over time.  There is a ball bearing which also wears out due to grease exhaustion. The third failure mode is grease exhaustion of the clutch grease.” The same is valid for belt tensioners.

In this rare case of automotive engineering, less is actually more when it comes to belt drive system tension.

This video is sponsored by Continental.

You May Also Like

Automotive Fuses and Relays: Troubleshooting Electrical Issues

Ever wondered how your car’s electrical system stays safe and functional?

Every automotive circuit is protected by a fuse. If excessive current begins to flow, such as in the event of a short to ground on a positive side, or an overloaded or failing component. When the circuit current increases above the fuse rating, the fuse will get hot and melt in half.

Learn How To Safely Lift HEVs and BEVs

If you can’t lift a vehicle without damage, you will not be able to unlock this service opportunity in this growing segment.

Understanding LSPI & Engine Oil

Discover the importance of using the correct oil specification for your vehicle.

Understanding Air Suspension

We explore the evolution and functionality of air suspension systems for vehicles.

Suspension Bushings: Role, Materials, and Wear Indicators

Regular inspection and timely replacement of worn bushings are crucial for optimal vehicle performance and safety.

Other Posts
Randy Breaux, Group President, GPC North America, Talks to AMN Drivetime

At NAPA, “Breaux Knows” business relationships, ABCs to avoid, and serving the automotive professional.

Serpentine Belt and Drive System Maintenance

Properly maintaining the entire drive system prevents premature belt wear and system failure, ensuring customer satisfaction and vehicle reliability.

EGR Systems: Understanding Exhaust Gas Recirculation

Learn how it works, its history, and its impact on both performance and the environment.

Advanced Cooling System Technologies: Hybrid & EVs

Learn how to keep your hybrid or electric vehicle running smoothly and efficiently.