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Dayco

Dayco Products, LLC, researches, designs, manufactures, and distributes a wide range of superior-quality products for the automotive, trucking, construction, agricultural, and industrial markets, including belts, hoses, tensioners, and pulleys.

Innovative, technology-driven Dayco is widely recognized in both the original equipment and automotive aftermarket industry due to its strong commitment in providing only the best products and services to its customers. With a 5,000-strong workforce and a network of technical facilities as well as sales offices around the globe, Dayco consistently anticipates and satisfies the customers' needs, a primary business strategy the company has adapted over 100 years ago...

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Dayco 100 Years

Dayco Products, LLC, is a leader in research and design, manufacturing and distributing of a broad range of belts, hose, tensioners and pulleys for the automotive, trucking, construction, agricultural and industrial markets.

Recognized by both the original equipment and the automotive aftermarket as an innovative, technologically driven organization, Dayco operates a fully integrated global network of technical facilities and sales offices employing a workforce of nearly 5,000. Dayco continues to be guided by the same primary business strategy established over 100 years ago: to anticipate and satisfy the needs of our customers by providing timely, quality products and services.


The 100-Year History of Dayco

Dayco Products, LLC, is a topnotch manufacturer that researches, designs, and distributes a broad selection of high-quality belts, hoses, tensioners, and pulleys. Its products are widely used in the automotive, trucking, construction, agricultural, and industrial markets.

Dayco boasts of a 5,000-strong workforce with a fully integrated network of technical facilities and sales offices across the globe. Innovative and technologically driven, Dayco has gained recognition in the original equipment and automotive aftermarket industry with its superior-quality products and services. It effectively anticipates and satisfies the customers' needs, a primary business strategy that has guided the company for over 100 years.

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Troubleshooting

Product FAQ's

Q. Is it true that a tensioner can be positioned properly when the locator pin is missing?
-This is incorrect. A tensioner cannot be positioned properly when the locator pin is missing, and the tensioner body covers the positioning hole.

Q. Is it true that a threaded steel positioning pin in an automatic belt tensioner can tear itself out of the aluminum housing?
-In all of our testing, we have never had a steel pin fail, pull out of the aluminum housing or damage the aluminum housing in any way.

Q. Do your steel locator pins require retrofitting on certain applications?
- Our steel locator pins are positioned in one place, accurately and require no retrofitting by installers.

Q: Is it true that Dayco's automatic belt tensioners are universal in fit?
- Dayco does not sell any universal tensioners. Each tensioner is specifically designed to fit and function just like the OE tensioner. In fact, many of the OE tensioners we replace are Dayco tensioners that look almost identical to our replacement tensioner.

Q: Does Dayco have less coverage than it's competition with its automatic belt tensioner line?
-This is absolutely false. Dayco has more coverage in both light duty and heavy-duty tensioners than any competitor. Our data is supported by a very detailed analysis of Polk V.I.O. data.

Q: Why did Dayco decide to use flat springs in their automatic belt tensioners?
-Tensioners were initially used on the demanding heavy-duty diesel engine drives where Dayco is the dominant tensioner supplier. Because of this, it only made sense to continue with this technology in our light duty line as well.

Q: When do you recommend replacing a serpentine belt?
-If you notice more than four cracks per inch in the belt it is recommended that the belt be replaced.

Q: Why do Dayco Poly Cog belts have transverse grooves on the bottom side?
-The transverse grooves dramatically increase belt life a minimum of 40% by reducing operating temperature up to 50 degrees F, 10 degrees C. They also reduce sensitivity to environmental factors such as dust and splash induced slip while reducing the harmonic noise. Other reasons include the fact that they increase flexibility in normal and backside bending as well as providing better pulley contact for less slippage.

Q: Why do Dayco Top Cog belts actually have the cogs?
-The Top Cog configuration increases flexibility and airflow around the belt. They also provide greater surface area to help the belt dissipate heat more efficiently and run better on small diameter pulleys.

Q: Is it wise to replace the tensioner and idler pulleys when replacing the timing belt?
-When replacing a timing belt, the timing belt system tensioner(s) and idler pulley(s) must also be examined to determine if they exhibit signs of wear or damage. If so these components should also be replaced. Approximately 50% of newly replaced timing belt failures are the result of non-replacement of faulty timing belt system tensioners and or idler pulleys.

Q: Are Dayco's timing belt components equivalent to the Original Equipment parts?
-Dayco's tensioners and idler pulleys are manufactured to meet the critical OE quality, fit, form and function requirements demanded by both domestic and imported vehicle manufactures to ensure long lasting peak performance.d.

Q: Do you recommend replacing all belts at the same time?
-Yes! If one belt on your vehicle has failed, you can bet that the others are not far behind. It is wise to replace all of your belts at the same time.

Q: When do you recommend changing your belts?
-You should begin checking your belts at 20,000 miles. Things to look for are cracks and splits, glazing, peeling, greasy buildup and splitting or missing sections.

Dayco Radiator Hose

Dayco's heavy-duty line of radiator hoses has been in production for over 50 years now and is continuously being developed using the latest research and production technologies. With its innovative design, the Dayco radiator hose line has the capacity to provide the most flexible connection between the radiator and engine for the anti-freeze coolant to easily pass through. The heavy-duty straight radiator hose, gold label flex radiator hose, and silicon radiator hose are just some of the best-selling Dayco radiator hoses. Each hose is built with a knitted reinforcement, synthetic EPDM construction with top-quality woven mesh fabric, and corrosion-resistant nitrile tube compounds. With its strong, highly resistant outside coating, the Dayco radiator hose can endure a variety of damaging environmental and non-environmental elements, such as ozone, battery acids, oil, and gasoline. It doesn't chip nor break, making it the best radiator hose for your engine. If you need to replace your old and damaged radiator hose, choose an OE-quality replacement from Dayco. Get it from a trusted online store like us to guarantee 100% quality and authenticity.

Dayco® Standard Heater Hose

Dayco's standard heater hose is designed to facilitate the efficient transfer and return of the heated coolant from the engine block to the heater core. This hose is built for general service and is ideal for light trucks and passenger cars. It has a durable construction made with all-EPDM compounds and spiral reinforcement, giving it a high-burst strength and maximum heat resistance of -40°F (-40°C) to +257°F +125°C). This specially designed black cover hose is identical to SAE 20R3, Class D-2, and is compatible with all common coolants and coolant additives.

Note: NOT suitable for fuel or oil transfer

Dayco® W Profile Poly Rib® BeltBuilt for high-mileage, multiple-accessory drives

Dayco's "W" profile belt (patent pending) features a revolutionary, multi-rib belt design, considered as the most innovative development in over 25 years. This unique rib profile was developed through rigorous laboratory testing and actual road mileage evaluations, giving it the power to conform to high mileage and worn or misaligned drives while delivering a quiet, long-lasting performance.

With its heavy-duty Aramid-reinforced, EPDM-compound construction, the Dayco "W" profile belt definitely exceeds OE quality and provides the solution to stressful driving problems. Dayco Poly-Rib Belts meet and exceed SAE J1459 and SAE J1596 specifications.

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Dayco® Timing Belt Built for OHC- and DOHC-type engines

Widely recognized in the automotive industry as the timing belt expert, Dayco's global popularity and success continue to rise with its innovative timing belt developments. Our patented self-lubricating, abrasion-resistant fabric provides longer pulley and belt life, while the molded cog design gives off a quieter sound and is more cost-efficient than chain drives. To ensure precise length stability, our belts are designed with a high-modulus glass fiber, non-stretch cord, and they are built to maintain the engine's smooth operation for a long period of time. The belt can be used for both normal service and high-performance, high-temperature engines using HSN compounds with its specialized compounding and tooth configurations. The three final digits included in the part number comply with industry standard numbering. Each Dayco Timing Belt meet and exceed all OEM performance specifications.

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Dayco® Timing Belt Built for OHC- and DOHC-type engines

Widely recognized in the automotive industry as the timing belt expert, Dayco's global popularity and success continue to rise with its innovative timing belt developments. Our patented self-lubricating, abrasion-resistant fabric provides longer pulley and belt life, while the molded cog design gives off a quieter sound and is more cost-efficient than chain drives. To ensure precise length stability, our belts are designed with a high-modulus glass fiber, non-stretch cord, and they are built to maintain the engine's smooth operation for a long period of time. The belt can be used for both normal service and high-performance, high-temperature engines using HSN compounds with its specialized compounding and tooth configurations. The three final digits included in the part number comply with industry standard numbering. Each Dayco Timing Belt meet and exceed all OEM performance specifications.

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Timing Component Kit Built to offer the convenience of an application-specific, matched set of tensioner(s) and idler pulley(s) in a single package

Dayco Timing Component Kits are conveniently pre-packaged with tensioner, idler pulley, and complete installation instructions in English, French, and Spanish. Each component included in this kit is guaranteed to meet and exceed the specifications of the original equipment parts and matches the precise make, model, and year of the vehicle being repaired. For proper identification and comparison, each tensioner and idler pulley in this kit is individually packaged in transparent plastic bags. This way, you can compare the parts to the original without compromising the kit's reliable packaging.

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Dayco® Timing Belt Water Pump Kits Ideal Replacement for Worn or Damaged Timing Belts, Tensioners, Belt Idlers, Hydraulic Actuators, and Water Pumps

The Dayco Timing Belt Water Pump Kit provides a convenient solution for the replacement of the major components in a timing belt assembly. Each kit component is manufactured with the help of topnotch facilities and is prepackaged for safe delivery. The kits come with trilingual installation instructions and are backed by an extended warranty to guarantee the highest quality timing belt replacement for both professional and DIY mechanics.

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Dayco® No Slack™ Automatic Belt Tensioner Built to maintain constant tension on serpentine belt drives

Serpentine belt drives power the majority of the engine accessories. This device is composed of a single belt and maintains proper tension throughout the drive with the help of an automatic, spring-loaded tensioner that's built into the drive system geometry. Designed with a patented, corrosion-resistant, "flat spring" structure, Dayco's Automatic Belt Tensioner provides less operating range variations in tension to minimize the risk of premature bearing failure due to high tension. Low tension is also prevented, effectively reducing the occurrence of belt squeal, slippage, and poor belt performance. An abrasion-resistant Teflon strip is wrapped around the spring for extra protection.

Dayco® No Slack™ Idler/Tensioner Pulleys Ideal replacement for serpentine and V-belt drive idler and tensioner pulleys

Dayco's high-performance idler and tensioner pulleys are designed, engineered, and manufactured using advanced automotive technologies. Each plastic pulley is designed with specially formulated glass-filled polymers, ensuring long-lasting strength and resistance to premature wear. Revolutionary 3D computer-aided design (CAD) and finite element analysis (FEA) are used in manufacturing both steel and plastic pulleys to guarantee optimum design and maximum durability. The pulleys are manufactured with smoother surfaces and tighter dimensional tolerances to ensure lesser vibrations and longer belt life. For optimum bearing performance, the pulleys are also equipped with lifetime-lubricated ball bearings and double high-temperature seals.

Featured Dayco Parts