Engine Pulleys
- Gates®Accessory Belt Drive KitAccessory Belt Drive Kit by Gates®. Gates is the largest global manufacturer of OE timing belts. This means Gates is able to cover the Aftermarket with timing belts that are OE-equivalent, or better, in service life and performance....The finest quality at a great priceGates carries everything needed to complete the job$45.74 - $388.02
- Gates®Micro-V™ Serpentine Belt Drive Component KitMicro-V™ Serpentine Belt Drive Component Kit by Gates®. Solution Kits are precision engineered by Gates - The world's most experienced designer of accessory belt drive systems and manufacturer of premium quality parts.Made with precision and quality in mindDesigned to meet your specific needs$55.00 - $464.32
- Gates®DriveAlign™ Belt Drive TensionerDriveAlign™ Belt Drive Tensioner by Gates®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Comprehensive line includes parts to fit cars, vans, SUVs, and light trucksFull line coverage for import, domestic, and heavy-duty cars, trucks, and vehicle applications$27.02 - $260.57
- TRQ®Accessory Drive Belt TensionerAccessory Drive Belt Tensioner by TRQ®. Want to get rid of the rattling noise coming from the timing cover area? This high-grade TRQ drive belt tensioner is exactly what you need. Built to meet or exceed the OEM specifications, it...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$20.63 - $91.09$21.95 - $97.95Save up to 9%
- Gates®DriveAlign™ Premium OE Idler PulleyDriveAlign™ Premium OE Idler Pulley by Gates®. When you're low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high...High quality construction provides high durability for long lifeBearing meets or exceeds OE and is designed for application specific speed and load requirements$12.25 - $180.88
- ACDelco®GM Original Equipment™ Drive Belt TensionerGM Original Equipment™ Drive Belt Tensioner by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$6.15 - $322.94
- Genuine®Crankshaft Pulley BoltCrankshaft Pulley Bolt by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using state-of-the-art...Made with precision and quality in mindDesigned to meet your specific needs$3.77 - $46.73
- Dorman®TECHoice™ Drive Belt Idler PulleyTECHoice™ Drive Belt Idler Pulley by Dorman®. This replacement accessory drive belt idler pulley has been engineered to match the function and performance of the original pulley on select vehicle years, makes and models, properly...Direct replacement - this accessory drive belt idler pulley matches the fit and function of the original equipment pulley on specified vehiclesRestores performance - fixes a failed, squealing or groaning noise from a worn idler pulley$9.92 - $128.09
- Four Seasons®Drive Belt Idler PulleyDrive Belt Idler Pulley by Four Seasons®. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of car parts experience, fix it once and fix it right with Four Seasons.OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$8.53 - $53.28
- ACDelco®GM Original Equipment™ Drive Belt Idler PulleyGM Original Equipment™ Drive Belt Idler Pulley by ACDelco®. Designed utilizing the latest technology, this GM Original Equipment™ Drive Belt Idler Pulley by ACDelco features premium quality and will perform better than...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$17.43 - $245.01
- TRQ®Accessory Drive Belt Idler PulleyAccessory Drive Belt Idler Pulley by TRQ®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$21.57 - $46.95$22.95 - $49.95Save up to 8%
- TRQ®Serpentine Belt Drive Component KitSerpentine Belt Drive Component Kit by TRQ®. Specifically designed as a quality replacement for a malfunctioning part, this top-grade TRQ serpentine belt drive component kit meets or exceeds the OEM specifications. It is capable of...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$49.35 - $114.90$51.95 - $120.95Save up to 8%
- Continental® ContiTech™Accessory Drive Belt KitAccessory Drive Belt Kit by Continental® ContiTech™. When replacing a worn out serpentine belt, it's a good practice to also replace the idlers and tensioners along with it to prevent uneven wear and the risk of failure in the future....OE-quality products for safe, reliable, and efficient performanceManufactured with precise tolerances and ultimate quality$13.41 - $457.15
- Continental® ContiTech™Elite™ Gatorback Belt Tensioner AssemblyElite™ Gatorback Belt Tensioner Assembly by Continental® ContiTech™. This belt tensioner assembly is constructed to meet OE requirements for fit, form, and function. It provides smooth, noiseless, and vibration-free operation thanks...Constructed to match OE form, fit, and functionMaintains its correct alignment to the belt and correct accessory belt tension$30.41 - $249.74
- ACDelco®Professional™ Idler PulleyProfessional™ Idler Pulley by ACDelco®. The ACDelco Professional, premium aftermarket Idler Pulley is designed for use on automobiles and light duty trucks as a locked center tensioning pulley, an automatic belt tensioner pulley, or...Bearing is designed for application specific speed and load requirementsProvides reliable operation under severe conditions for year round performance$19.55 - $322.53
- Dorman®TECHoice™ Drive Belt Tensioner AssemblyTECHoice™ Drive Belt Tensioner Assembly by Dorman®. This replacement belt tensioner assembly is designed to match the fit and function of the original equipment belt tensioner on specified vehicles. Engineered with quality components...Quality tests on this part include torque testing, spring-back testing, corrosion-resistance testing, and on-vehicle testingHighly resistant to heat and shock$25.07 - $178.35
- Mopar®Crankshaft PulleyCrankshaft Pulley by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to meet the...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$6.44 - $2,092.92
- Dayco®Drive Belt Idler PulleyDrive Belt Idler Pulley by Dayco®. Dayco's reputation for top performance idler and tensioner pulleys is a result of advanced automotive technologies employed in materials research, design engineering, and manufacturing of our pulleys.OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$16.80 - $186.34
- Hayden®Drive Belt Idler PulleyDrive Belt Idler Pulley by Hayden®. This part is designed to route the drive belt and keep it tight. If the pulley goes bad, it can cause problems with cooling, charging, steering, and climate control. Replace a faulty pulley with a...Constructed to ensure OE quality and reliabilityMade of steel and thermoplastic for long service life and superior dampening$10.30 - $69.24
- ACDelco®Professional™ Drive Belt TensionerProfessional™ Drive Belt Tensioner by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Right for your vehicle and lifestyleMade from high-quality materials for ultimate durability$35.35 - $381.11
- Mopar®Drive Belt TensionerDrive Belt Tensioner by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to meet...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$10.81 - $652.24
- SKP®Drive Belt TensionerDrive Belt Tensioner by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$7.71 - $173.92
- Crown®Drive Belt Idler PulleyDrive Belt Idler Pulley by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!Developed to improve your driving experienceConstructed to ensure ultimate operation$22.42 - $73.02
- ACDelco®GM Original Equipment™ Engine Crankshaft PulleyGM Original Equipment™ Engine Crankshaft Pulley by ACDelco®. Designed utilizing the latest technology, this GM Original Equipment Crankshaft Pulley by ACDelco features premium quality and will perform better than advertised. Perfect...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$31.78 - $241.60
- ACDelco®Genuine GM Parts™ Drive Belt TensionerGenuine GM Parts™ Drive Belt Tensioner by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$38.80 - $63.64
- ACDelco®Professional™ Serpentine Belt Drive Component KitProfessional™ Serpentine Belt Drive Component Kit by ACDelco®. Made of EPDM rubber for long life and quiet, dependable performance, ACDelco Professional Automotive Belts are designed to meet or exceed OEM performance requirements. And...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$59.54 - $474.98
- Dorman®OE Solutions™ Crankshaft PulleyOE Solutions™ Crankshaft Pulley by Dorman®. This engine harmonic balancer pulley is designed to match the fit and function of the original pulley on specified applications. Made of quality materials, it is engineered for reliable...Direct replacement - this engine harmonic balancer pulley is designed to match the fit and function of the original pulley on specified applicationsRestores functionality - reliable replacement for an original pulley that has failed due to vibration$27.94 - $114.98
- Mopar®Crankshaft Pulley BoltCrankshaft Pulley Bolt by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$0.64 - $104.77
- Mopar®Drive Belt Idler PulleyDrive Belt Idler Pulley by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$18.33 - $583.33
- Genuine®Drive Belt Idler PulleyDrive Belt Idler Pulley by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using state-of-the-art...Made with precision and quality in mindDesigned to meet your specific needs$17.07 - $733.22
In a typical serpentine belt accessory drive system there is a drive pulley that is part of or attached to the crankshaft mounted harmonic balancer, a pulley at each of the belt-driven accessories, a belt tensioner and one or more idler pulleys. The rubber ring between the hub and inertia ring on the harmonic balancer can fail and these components are discussed more in depth on our harmonic balancers product page.
The pulleys that directly affect belt adjustment and noise are the tensioner and idler pulleys. A worn tensioner will cause the belt to slip and reduce accessory efficiency. For example, alternator charging output may be reduced which may wear the battery down. Your vehicle may not start and the CHECK ENGINE light may illuminate. Slippage will also wear the belt and cause a squealing noise, as well as generate heat that will reduce the life of accessory pulley bearings. Many tensioners also include a dampening mechanism to control vibration. A worn damper will allow belt slap, which can also cause pulley bearings to fail.
Pulley misalignment can cause belt chirp. Worn tensioner and idler pulleys can cause misalignment, which can also create excessive heat that wears the belt and the pulley bearings. You can replace the automatic tensioner and idler pulley(s) along with the serpentine belt - our accessory drive belt kits provide everything needed. During deceleration, the spinning alternator creates drag, creating strain on the serpentine belt and tensioner. Many manufacturers use alternator decoupler pulleys, which allow the alternator to freewheel during deceleration, eliminating strain and increasing belt and tensioner lifespan.
There are One-Way Clutch (OWC) and Overrunning Alternator Decoupler (OAD) pulleys. Both function similarly, but the OAD also contains a mechanism to reduce vibration. Many OE dealers do not service these pulleys separately from the alternator, but we have them, along with the installation tools, so you can save money. If you want to reduce your accessories’ power consumption without negatively affecting function, you can reduce the weight of your pulleys and by changing their diameter. We offer aluminum pulleys that are much lighter than the original equipment pulleys, without any reduction in strength. Their light weight not only results in a horsepower increase, but the reduced rotational mass also improves throttle response.
The accessories on modern vehicles are generally driven by a single serpentine belt, but older performance vehicles used multiple V-belts, and even if tensioned properly, centrifugal force would often cause these belts to jump during high RPM shifts. Then as now, the answer to this problem is a deep groove pulley, but you don’t have to spend a lot of time and money searching for an original part that may have been discontinued long ago. We can supply you with pulleys that feature deep, precision machined grooves for secure belt retention even at extreme RPM changes, and some are underdriven so you gain horsepower as well.
Browse by Part Name
Featured Brands
Related Categories
- Engine Assemblies
- Motor Mounts
- Engine Blocks
- Valves & Valvetrain Parts
- Pistons, Rings & Connecting Rods
- Oil Filters
- Serpentine Belts & Auxiliary Drive Belts
- Valve Covers
- Timing Gears, Chains & Covers
- Engine Oil Pans, Drain Plugs & Dipsticks
- Cylinder Heads
- Timing Belts
- Engine Sensors, Relays, Switches & Connectors
- Oil Pumps
- Drive Belt Tensioners
- Oil Coolers
- Camshafts
- Crankshafts
- Engine Management Systems
- Engine Bearings
- Harmonic Balancers
- Engine Rebuild Kits
- Oil Catch Cans
- Balance Shafts
- Engine Swap Kits
- Engine Wiring Harnesses
- Intercoolers
- Throttle Bodies
- Carburetors
- Motor Oils