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Receive Up To 30% Off Your Online Purchase Of Select Parts And Accessories
Use promotional code MMJ30 at checkout to receive 30% off the following categories: Select Brake Parts, Select Hi-Performance and Truck Accessories, Batteries, Paint, Splash Guards, Select Ventvisors & Bug Shields, Springs & Spacers, Water Pumps, Belts, A/C Parts, Starters, Alternators, Fuel Pumps, Radiators, Radiator Fans, Thermostats, Caps & Clamps, Clutches, Spark Plugs, Plug Wires, CV Axles, Battery Chargers & Booster Cables, OE Locks, Rack & Pinons, Window Motors, RainX Wipers, Appearance Chemicals, Floor Mats, Lift Equipment, Hand Tools, Travel Accessories, Car Covers, Seat Covers, Wheel Covers, Body Repair, Collectibles and Apparel.

Use promotional code MMJ20 at checkout to receive 20% off the following categories: Ignition, Shocks & Struts, Chassis, Jumpstarts, Air Filters, Oil Filters, Bearings & Seals, Engine Parts, Wash Accessories, Outdoor Lifestyle, Towing, Mini Air Compressors, Tire Repair Accessories, Mufflers, Grease/Oil, Additive Chemicals, P/S Pumps, Cooling Product, Timing Belts, Specialty Tools, Radiator Hose, Motor Mounts, Mirrors, Lug Nuts, Sealants/Adhesives, Fuel Filters, P/S Hoses, Gas Cans, Oil Change Accessories, Help, Wiper Motors, Loaner Tools, Air Compressors, Horns, Books, Distributors, Sun Control and Exhaust Adapters.

Use promotional code MMJ15 at checkout to receive 15% off the following categories: Test Equipment, Power Tools, Emergency Supplies, Electronics and Stereo & Accessories (MAP pricing Exclusions).

Offers not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Those products that are included in these offers will be displayed in product search results and product detail pages. Excludes the following brands: WeatherTech, Champion, Powerstop, Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, Thule, Thule Karrite, JVC, Flowmaster, Hurst, B&M, MSD, Moog, Wagner, Philips and BBK Performance. Valid online until 11:59 PM EST on 11/22/17.

Receive 10% Off Wagner branded brake parts with your online purchase. Use promotional code: WAGNER10.

Receive 20% Off Select Champion branded products with your online purchase. Use promotional code: CHAMP20.

Receive 10% Off Select FelPro branded products with your online purchase. Use promotional code: FELPRO10.

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Serpentine Belt



Serpentine Belt

Serpentine Belts, also known as Poly-V, Multi-Rib, Multi-V or Poly Rib belts, are the unsung hero of your car?s engine. This single, continuous belt is used to drive many components, including your vehicle?s alternator, water pump, power steering pump, air conditioning compressor, air pump and more.

What is a serpentine belt and what does it do?

How Does it Work?

  • The belt transmits power from the crankshaft or engine to all front end accessory components.
  • Belts are still one of the most efficient ways to transmit power.
  • Drives many components in your engine.
  • Primary function supplies power to the steering system, water pump, air conditioner and alternator.

How is it Made?

  • Serpentine belts are made of EPDM, an extremely durable compound used to extend the life of serpentine belts.

Why Does it Fail?

  • Belts are standard wear items and should be inspected at roughly 50,000-70,000 miles.
  • These new EPDM belts resist cracking unlike the older OE belts, but they do wear as they lose rubber like a tire.
  • With the development of the new EPDM belt compounds, the failure mode of the belt is not the same as it was in the past with the previous neoprene belts. The EPDM belt will not exhibit rib cracking, even when reaching 80,000-100,000 miles.
  • Even though the ribs may not show cracking, the rib rubber will wear down, resulting in a decreased ability to pull the accessory torque loads.

What are the Symptoms of Failure?

  • Slipping, chirping or squealing noises coming from under your hood.
  • One of the systems supported by the serpentine belt fails, such as your battery drains or your vehicle loses power steering failure.
  • Check Engine Light (CEL) illumination.

What are the Implications of Failure?

  • All functions supported by the serpentine belt immediately stop working.
  • Vehicle stops working.
  • Loss of power steering, air conditioning.
  • Damage to additional components and/or engine.

How Difficult is the Install?

Difficulty Rating:

Note: This is different for every application, but 30 percent of vehicle serpentine belt replacements take less than 15 minutes.

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