Engine Pulleys
- 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
- Continental® ContiTech™Elite™ Gatorback Drive Belt Idler AssemblyElite™ Gatorback Drive Belt Idler Assembly by Continental® ContiTech™. Every part in this assembly is engineered to look, install, and operate the same way or better than the factory parts. Every component meets original equipment...Original equipment equivalentFactory-like fit and dependability$14.92 - $80.92
- 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
- URO Parts®Drive Belt Idler PulleyDrive Belt Idler Pulley 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 reliable...Replaces your worn out factory engine part to restore vehicle's performanceConstructed from top notch materials for ultimate strength and reliability$11.17 - $206.58
- Vaico®Drive Belt Tensioner AssemblyDrive Belt Tensioner Assembly 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$8.09 - $305.11
- 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 - $70.80
- DIY Solutions®Crankshaft Pulley BoltCrankshaft Pulley Bolt by DIY Solutions®. If you're seeking to get your steel stallion back to its tip-top condition, then this top-notch replacement solution is what you should definitely look out for. When it comes to quality,...Designed to help restore your vehicle to its former gloryQuick replacement to let you enjoy an awesome ride again$31.57
- DIY Solutions®Drive Belt Idler PulleyDrive Belt Idler Pulley by DIY Solutions®. If you're seeking to get your steel stallion back to its tip-top condition, then this top-notch replacement solution is what you should definitely look out for. When it comes to quality,...Designed to help restore your vehicle to its former gloryQuick replacement to let you enjoy an awesome ride again$8.11 - $102.97
- ACP®Crankshaft PulleyCrankshaft Pulley by ACP®. Looking for reliable parts for your vehicle? Then ACP products are for you. They are made to meet or exceed OEM standards while maintaining the original factory look. ACP works with the latest in advanced...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$77.22 - $106.40
- Autotecnica®Drive Belt Idler PulleyDrive Belt Idler Pulley by Autotecnica®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...Made with precision and quality in mindDesigned to meet your specific needs$10.74 - $20.22
- ACDelco®GM Genuine Parts™ Accessory Drive Belt Tensioner BoltGM Genuine Parts™ Accessory Drive Belt Tensioner Bolt by ACDelco®. GM Genuine Parts Bolts are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed...Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors$5.23 - $6.59
- ACDelco®GM Genuine Parts™ Engine Timing Belt Idler Pulley BoltGM Genuine Parts™ Engine Timing Belt Idler Pulley Bolt by ACDelco®. GM Genuine Parts Bolts are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These bolts fasten vehicle components together....Fastens vehicle's components togetherSome GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)$6.24
- ACDelco®GM Genuine Parts™ Engine Timing Belt Tensioner BoltGM Genuine Parts™ Engine Timing Belt Tensioner Bolt by ACDelco®. GM Genuine Parts Bolts are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These bolts fasten vehicle components together. GM...Fastens vehicle's components togetherSome GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)$6.24
- 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$31.26 - $235.83
- ACDelco®Genuine GM Parts™ Crankshaft PulleyGenuine GM Parts™ Crankshaft Pulley 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 your...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$66.43 - $157.05
- 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 - $62.60
- ACDelco®Genuine GM Parts™ Engine Drive Belt Idler PulleyGenuine GM Parts™ Engine Drive Belt Idler Pulley 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$25.64 - $52.23
- TRQ®Accessory Drive Belt Tensioner PulleyAccessory Drive Belt Tensioner Pulley by TRQ®. If you want to keep your vehicle running smoothly, this high-grade TRQ drive belt tensioner pulley is exactly what you need. Designed to meet or exceed the OEM specifications, it ensures...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$11.47 - $25.87$11.95 - $26.95Save up to 5%
- 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$34.54 - $119.45
- Dorman®OE Solutions™ Drive Belt Idler PulleyOE Solutions™ 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$13.93
- Mopar®Supercharger Drive Belt TensionerSupercharger Drive Belt Tensioner by Mopar®. 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...Carefully crafted from premium materialsExcellent corrosion and wear resistance$121.10 - $226.47
- Genuine®Accessory Belt Idler AssemblyAccessory Belt Idler Assembly 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...Made with precision and quality in mindDesigned to meet your specific needs$150.33 - $620.62
- Genuine®Accessory Belt TensionerAccessory Belt Tensioner 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...Made with precision and quality in mindDesigned to meet your specific needs$20.36
- Genuine®Drive Belt TensionerDrive Belt Tensioner 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$84.39 - $786.43
- Genuine®Drive Belt Tensioner AssemblyDrive Belt Tensioner Assembly by Genuine®. If your engine parts is in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain store. On our...Designed to restore your vehicle’s HVAC systemGenuine OE replacement parts from the OE manufacturer$196.39 - $213.12
- Gates®Drive Belt Tensioner PulleyDrive Belt Tensioner Pulley 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 perfect...Made with precision and quality in mindDesigned to meet your specific needs$48.63 - $55.61
- Gates®Serpentine Belt Drive Solution KitSerpentine Belt Drive Solution 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.OE quality fluids from top original equipment and aftermarket manufacturersThe finest quality at a great price$77.63 - $451.93
- Motorcraft®Drive Belt Tensioner PulleyDrive Belt Tensioner Pulley by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM...Made with precision and quality in mindDesigned to meet your specific needs$38.26 - $136.58
- SKP®Drive Belt Tensioner PulleyDrive Belt Tensioner Pulley 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$7.51 - $52.65
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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- Valves & Valvetrain Parts
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