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Replace serpentine belts, pulleys, tensioners together for best performance

JonwithSerpBeltKit1Serpentine belts on today’s cars can have over 10 points of contact, creating very complicated drive systems and more opportunities for issues such as pulley misalignment or unwanted noise. Years ago, belts were made with a Neoprene rubber compound that failed much more quickly than today’s serpentine belts, which are made with EPDM (Ethylene Propylene Diene Monomer). Most OEMs recommend serpentine belt inspections around 60,000 miles and service around 90,000 miles.


Prevent Vehicle Comebacks and Reduce Engine Noise Issues
Changing all front-end components at the same time helps prevent comebacks, reduces noise issues, and enhances overall system performance. If a technician only replaces the belt, the driver may experience issues with a loose tensioner or pulley within weeks, and may end up needing to replace the belt a second time due to premature failure. For instance, worn tensioners can cause belts to slip and therefore glaze, destroying a new belt. Worn parts can also cause slippage on the alternator, prompting a “check engine” light. A pulley with a worn bearing can cause misalignment, belt noise and wear, and a worn tensioner damper can set off false misfire codes.

Pulleys, tensioners and serpentine belts work harmoniously and experience wear and tear at a similar rate so replacing them together will allow for more enhanced performance. In some cases, even the water pump may need replacement. Next time you’re checking a belt, follow these simple tips:

  1. Check belts, tensioners and pulleys around 60,000 miles
  2. Look closely for belt wear and the difference between a V- and a U-shaped rib
  3. Check for noise like squeaks and squeals
  4. Use a laser alignment tool to ensure proper alignment
  5. Replace all front-end drive system components together for best performance

Kits Make Maintenance More Affordable
Dayco kits include all of the parts needed to ensure that the repair job is done correctly the first time. With coverage for millions of light vehicles on the road, Dayco’s serpentine belt kits are engineered to perform in the most demanding environments where safety and productivity are essential.

And Dayco’s kits make it easier than ever – as well as more affordable – to complete a full front-end accessory drive repair at the same time.

Check out our video on serpentine belt maintenance.