Engine Pulleys
- URO Parts®Tensioner AdjusterTensioner Adjuster by URO Parts®. 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$8.18 - $30.26
- URO Parts®Timing Belt Tensioner DamperTiming Belt Tensioner Damper by URO Parts®. Replace your worn out engine part with this superior engine component designed by URO to restore your vehicle's factory performance. Manufactured to meet the highest OE standards, this...Replaces your worn out factory engine part to restore vehicle's performanceConstructed from top notch materials for ultimate strength and reliability$21.78 - $45.43
- Four Seasons®Drive Belt Idler Pulley BoltDrive Belt Idler Pulley Bolt 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.Made with precision and quality in mindDesigned to meet your specific needs$13.43
- Crown®Crankshaft Pulley NutCrankshaft Pulley Nut 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$13.71
- Crown®Drive Belt Tensioner BoltDrive Belt Tensioner Bolt 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$24.28 - $30.47
- Febi®Accessory Belt Tension DamperAccessory Belt Tension Damper by Febi®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$36.92 - $99.21
- Febi®Belt Tensioner AdjusterBelt Tensioner Adjuster by Febi®. 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$38.56
- Vaico®V-Ribbed Belt Vibration DamperV-Ribbed Belt Vibration Damper by Vaico®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$68.14 - $84.68
- CRP®Drive Belt Tensioner BoltDrive Belt Tensioner Bolt by CRP®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...Durable construction to withstand everyday wear and tearLeak proof junctions ensure long service life and unrestricted flow$1.77 - $5.20
- All American Billet®Front Serpentine Belt Drive SystemFront Serpentine Belt Drive System by All American Billet®. Designed utilizing the latest technology, this product by All American Billet features premium quality and will perform better than advertised. Perfect for your vehicle and...Made to provide unequaled quality and reliabilityTruly unique look and feel$2,425.50 - $6,835.50
- All American Billet®Silverline Series Front Serpentine Belt Drive SystemSilverline Series Front Serpentine Belt Drive System by All American Billet®. Designed utilizing the latest technology, this product by All American Billet features premium quality and will perform better than advertised. Perfect for...Made to provide unequaled quality and reliabilityTruly unique look and feel$2,515.50 - $6,925.50
- Billet Specialties®Tru Trac Serpentine SystemTru Trac Serpentine System by Billet Specialties®. Billet Specialties' Tru Trac is the answer for the ultimate accessory drive system for your HEMI. Everything you need is right here: pulleys, brackets, A/C compressor, alternator, power...Hard coat anodizing for durability in high belt wear areasPrecision machined black anodized pulleys, brackets, and covers$2,963.44
- GrimmSpeed®Pulley CoverPulley Cover by GrimmSpeed®. Tired of being teased for your boring engine bay? Did you replace your stock TMIC with one that doesn't facilitate the use of the stock engine cover? This cover mounts securely in place above your alternator...Laser Cut Heavy Duty Aluminum - perfect fit with a sleek but heavy duty lookMachined Aluminum Mounts for a clean look and corrosion resistance$79.00
- INA®Belt Tensioner DamperBelt Tensioner Damper by INA®. 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 perfect fit for a...Made from sturdy materialsGreat design and function$41.96 - $55.39
- Rein®Belt Tensioner BoltBelt Tensioner Bolt by Rein®. Some European vehicles have more issues than others with plastic components such as dipstick handles and dipstick funnels. The plastic they're made of gets brittle and can crack or break, possibly allowing...Direct fit, form, and functionEngineered to the highest OE standards$1.68 - $13.60
- Stabilus®Belt Tensioner DamperBelt Tensioner Damper by Stabilus®. 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 perfect fit...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$45.71 - $102.50
- Stabilus®Drive Belt Tensioner DamperDrive Belt Tensioner Damper by Stabilus®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$32.95 - $94.73
- Mopar®Hex Screw And WasherHex Screw And Washer by Mopar®. M10x1.50x65.00. Tensioner attaching. Timing Tensioner. 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...Carefully crafted from premium materialsExcellent corrosion and wear resistance$9.40
- Koyo®Drive Belt Idler PulleyDrive Belt Idler Pulley by Koyo®. 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$54.96
- Aftermarket®Crankshaft PulleyCrankshaft Pulley by Aftermarket®. 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$154.79 - $241.84
- Aftermarket®Drive Belt Tensioner PulleyDrive Belt Tensioner Pulley by Aftermarket®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$17.44 - $32.59
- LUK®Accessory Belt TensionerAccessory Belt Tensioner by LUK®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$54.52 - $66.82
- Mopar®Drive Belt Idler Pulley CapDrive Belt Idler Pulley Cap 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...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$2.72 - $37.86
- Dodge OEFront Tow Hook Nut (6101696)Front Tow Hook Nut (6101696) by Dodge OE. If you want to ensure peak performance of your Dodge mile after mile and keep it looking brand new, rely on superior-quality Dodge OE parts and accessories. They match the parts and accessories...Genuine Dodge OEM part designed for your make, model, and yearCrafted from premium-quality materials for long-lasting service$6.53
- Dodge OERear Bumper Cover Reinforcement Beam Nut (6101448)Rear Bumper Cover Reinforcement Beam Nut (6101448) by Dodge OE. If you want to ensure peak performance of your Dodge mile after mile and keep it looking brand new, rely on superior-quality Dodge OE parts and accessories. They match the...Genuine Dodge OEM part designed for your make, model, and yearCrafted from premium-quality materials for long-lasting service$10.01
- Ford OEBack Glass Wiper Arm Nut (W520413S442)Back Glass Wiper Arm Nut (W520413S442) by Ford OE. If you want to keep your Ford performing the way it did when it left the factory, rely on Ford OE products. Manufactured to strict specifications for fit, form, and function, they not...Genuine OEM Ford part made to fit your vehicle perfectlyDesigned to restore OEM performance for a safe ride$2.05
- Ford OEEngine Water Pump Bolt (W500015S437)Engine Water Pump Bolt (W500015S437) by Ford OE. If you want to keep your Ford performing the way it did when it left the factory, rely on Ford OE products. Manufactured to strict specifications for fit, form, and function, they not only...Genuine OEM Ford part made to fit your vehicle perfectlyDesigned to restore OEM performance for a safe ride$2.09
- Ford OEA/C Compressor Bolt (W500225S439)A/C Compressor Bolt (W500225S439) by Ford OE. If you want to keep your Ford performing the way it did when it left the factory, rely on Ford OE products. Manufactured to strict specifications for fit, form, and function, they not only...Genuine OEM Ford part made to fit your vehicle perfectlyDesigned to restore OEM performance for a safe ride$2.52
- Dodge OEEngine Mount Bolt (6101984)Engine Mount Bolt (6101984) by Dodge OE. If you want to ensure peak performance of your Dodge mile after mile and keep it looking brand new, rely on superior-quality Dodge OE parts and accessories. They match the parts and accessories...Genuine Dodge OEM part designed for your make, model, and yearCrafted from premium-quality materials for long-lasting service$10.41
- Dodge OEBattery Cable Nut (6506929AA)Battery Cable Nut (6506929AA) by Dodge OE. If you want to ensure peak performance of your Dodge mile after mile and keep it looking brand new, rely on superior-quality Dodge OE parts and accessories. They match the parts and accessories...Genuine Dodge OEM part designed for your make, model, and yearCrafted from premium-quality materials for long-lasting service$4.41
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.
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- Engine Assemblies
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