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, OEs 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

Why A 12-volt Battery is Still Essential in EVs

A device similar to an alternator, called a DC-DC converter, charges the 12-volt battery from the high-voltage battery pack.

Did you know that most electric vehicles still rely on a good old 12-volt battery? Despite that huge battery nestled below your feet, it’s the 12-volt battery that powers everything from your EV’s windshield wipers to its airbags.

For good reason we often marvel at the high-voltage systems that propel us forward, but it’s that trusty 12-volt battery that quietly maintains the heartbeat of the vehicle’s auxiliary components. So, why is the 12-volt battery so indispensable in an EV? It’s about functionality and adherence to safety regulations.

Turbocharger Maintenance ft. Rein TechSelect Turbo Kits

Learn about common challenges with turbocharger maintenance and how Rein TechSelect Turbo Kitsmake the repair process easier for technicians.

The Standard® Advantage

Standard® knows that what comes out of a repair is directly dependent upon what goes into the box. This video is sponsored by Standard®.

TransFix: What Happens When a Transmission Has a Harsh Shift?

Learn about the additives and conditioners that can rejuvenate the seals and eliminate varnish in the passages of the valve body.

Tesla Model 3 TPMS Service

Resetting and programming TPMS sensors for a Tesla is a lot like any other vehicle, and the challenge is still the same: keeping the light off.

Other Posts

Can You Jumpstart an EV?

First thing’s first: Find the LV battery, which could be anywhere in the vehicle.

Understanding What Antifreeze/Coolant Actually Does

Today, each manufacturer has its own formula for best results in their vehicles. This video is part of the Group Training Academy.

How The Vehicle Cooling System Functions

Here’s what to know to clarify cooling questions you’re asked at the service counter. This video is part of The Group Training Academy.

Oil Filter Housing Weak Points & Standard® Solutions

Engineers at Standard® have created a completely assembled Oil Filter Housing Kit.