Search Results

1IboughtNewCVT

I bought a new CVT belt. How do I break it in? 

It doesn’t matter if you drive a UTV, ATV or snowmobile,  you’ll need to break your new powersports CVT belt in using two heat cycles. After following proper installation ...
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2WhereDoIfindBeltRoutingDiagrams

Where do I find belt routing diagrams?

Dayco has more than 16,000 belt routing diagrams available on its Find Your Part search platform. If you come across a specific part number that does not have ...
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3HowCanITellIfASerpBeltisBad

How can I tell if a serpentine belt is bad?

Beyond looking at the belt directly for physical signs of damage – such as swelling, cracks, or disfiguration – pay attention to how your car is functioning. Noise is often ...
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4HowdoIcheckforbeltwear

How do I check for belt wear?

Belt wear can be difficult to detect because newer belts made with EPDM rubber tend to wear like tire tread, where there is material loss from the rib ...
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BalancerHP

How to Install a Harmonic Balancer

Harmonic balancers are used to help lessen the vibration of the engine. Maintenance and replacement are important. Belowe are the key steps ...
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Hosesfail1jpg

The Top 8 Reasons Why Radiator Hoses Leak

Coolant hoses have a tough job – they move chemicals under pressure and massive amounts of heat so they can be more prone to failure. Here’s the top ...
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CTVBreak

CVT Belt Installation and Break-In

For powersports enthusiasts, there’s nothing worse than getting stranded due to a busted belt. That’s why belt replacement and break-in is super critical ...
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CoolingSystemMaintenance

Proper Car Cooling System Maintenance

It is extremely important to flush and refill the cooling system with the OE recommended coolant, whether you are just performing cooling system maintenance or when changing ...
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Balancer with Wrench

Three Reasons for Harmonic Balancer Replacement

A harmonic balancer is not just there to spin the rest of the pulleys on the engine. It’s designed to help smooth out the engine’s harmonics to a ...
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BalancerS Ta1

High Performance Balancers vs. Stock Balancers

Many enthusiasts modify their vehicle’s engine for better performance and more horsepower, which in turn can raise not just the power the engine makes, but ...
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Beltrouting

Belt Routing Diagrams

There are more than 16,000 belt routing diagrams available in Dayco’s Find Your Part search platform, covering millions of vehicles makes and models. However, if you search a ...
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Dayco - Diagnosing Belt Noise Training

Diagnosing HD Belt Noise

Overview and knowledgement test ...
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Dayco - HD Belts Overview Training

HD Belt Line Overview

Overview and knowledgement test ...
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Dayco - System Selling Training

System Selling

Overview and knowledgement test ...
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Tensioner Flat Spring

Belt Tensioners: Flat Spring Design Makes all the Difference

The front-end drive system’s tensioner is designed to protect other components within the system and to help prevent premature failure of the water pump and alternator ...
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Dayco - Choosing the Right HD Water Pump

Choosing the Right HD Water Pump

Learn about inspection and installation intervals for heavy-duty water pumps from Dayco’s tech team. They share the top do’s and don’ts and explain what happens when the wrong ...
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Dayco - Measuring Belt Wear

Measuring Belt Wear

Learn how to use the Dayco Awearness gauge during a proper belt inspection. This quick tutorial shows how to measure the belt’s rib depth and rib profile as ...
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Dayco - HD Serpentine Belt Inspection Tips

HD Serpentine Belt Inspection Tips

Go under the hood of a big rig with Dayco’s tech team members to learn about serpentine belt maintenance for heavy-duty vehicles. They’ll show you how to troubleshoot ...
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Dayco - HD 2-Piece Tensioner #89947 DD15 Series Install

HD Two-Piece Tensioner #89947 DD15 Series Install

Our ASE master tech and product specialist take you step-by-step through the installation of Dayco’s new two-piece tensioner on a Freightliner DD15 engine. This particular tensioner was engineered ...
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5HowdoIknowifmytimingbelthasbeenreplaced

How do I know if my timing belt has been replaced?

Without maintenance history of a car, the best possible way is to check CarFax for a repair history report, ask the previous owner, or look for a sticker ...
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6Onatimingbeltrepair,whichmarks

On a timing belt repair, which timing mark is for the camshaft and which is for the crankshaft?

Most timing belts will have two double dotted line marks and 4 to 6 solid marks. Double dotted lines are for the crankshaft, and the solid line is ...
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7Whatisthecorrectserpbelttouse

What is the correct serpentine belt to use if I’m installing a 25% overdrive or underdrive balancer?

As long as nothing is removed from the routing system, like the A/C compressor, the OE stock belt length will still work. You can use our Find Your ...
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8Iinstalledaserpbeltacpldaysago

I installed a serpentine belt a couple of days ago and it broke. What did I do wrong?

When a belt breaks quickly after installation, it is likely due to one of the four reasons: It was not 100% seated in a pulley. Worn pulley bearings ...
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Dayco - Serpentine Belt Maintenance Tips

5 Serpentine Belt Maintenance Tips

Dayco’s engine experts share basic belt tips to help make installation easier. Learn about maintenance intervals, belt wear, troubleshooting noise and more ...
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Dayco - Powersports Belt Maintenance

Powersports Belt Maintenance

One of Dayco’s product specialists explains the basics of belt installation for your ATV, UTV, side by side (SXS) or snowmobile and the importance of a two-heat cycle ...
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Dayco - Signs of Pulley Failure

Pulleys and 8 Signs of Failure

Learn about the basic types of pulleys for today’s front end drive system and the eight key signs it’s time to change one. Watch as a Dayco product ...
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Dayco - Tensioner Replacement Tips

OE Quality Tensioner Technology

Dayco’s resident ASE certified technician talks about why Dayco’s tensioner design, and its patented flat spring technology, is preferred by many of today’s OEMs ...
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Dayco - Timing Belt Installation and Repair Tools

Timing Belt Installation & Repair Tools

Dayco’s resident engine experts show you all the tools needed to make timing belt installation easy – from cam sprocket tools to special two-pin tools ...
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Dayco - Common Water Pump Installation Errors

Common Water Pump Installation Errors

Learn the top two reasons water pumps fail after installation. Dayco’s engine experts also talk through torque, cooling system maintenance, why cavitation occurs and the importance of using ...
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9Myserpentinebeltismakingnoise

My serpentine belt is making a noise. How do I determine what’s causing it?

There are two very distinct noises caused by different issues - one is a chirp, the other is a squeal. Your best course of action is to conduct a ...
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10beltismakingachirp

What should I do if my belt is making a chirping noise?

There’s a few possible causes for a chirp: pulley misalignment, improper installation, extremely worn belt ribs, worn pulley bearings or contamination. We suggest the following solutions: Check alignment ...
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11WhatshouldIdoifBeltismaking Sqeaulingnoise

What should I do if the belt is making a squealing noise?

A squeal is usually caused by low bely tension or contamination. To rectify the problem, we suggest the following steps: Properly tension manual applications during installation (35 lbs ...
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12Howoftenshouldbeltbereplaced

How often should the serpentine belt be changed?

Regular inspection of all drive belts, tensioners and accessories should be recommended once the vehicle passes 60,000 miles. And when the belt is worn and ready for replacement, ...
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13HowcanItellifbeltisworn

How can I tell if a belt is worn out?

Belt wear can be difficult to detect because newer belts made with EPDM rubber tend to wear like tire tread, where there is material loss from the rib ...
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1MyCoolingsystemisoverheating

My cooling system is overheating. Is that a sign my water pump is bad?

It could be. The water pump is responsible for the cooling system and pulling heat away from the engine. If the pulley is loose or if you notice ...
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2Whyshouldwaterpumpbereplacedwithtimingbelt

Why should the water pump be replaced at the same time as the timing belt? 

It’s best practice to change both components at the same time because they usually wear out at the same pace and if one fails or is failing, the ...
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3HowMuchmoreBoostCanIgainwithOverorUnderBalancer

How much more boost can I gain with an overdrive or underdrive balancer?

The Dayco Underdrive and overdrive balancers are a great way to increase the performance of your factory supercharged car. These balancers feature pulleys that are either larger or ...
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4HowdoIknowifmyBalancerisBad

How do I know if my balancer is bad?

You’ll want to replace the balancer if you notice excessive vibration, crankshaft oil leaks, or deteriorated rubber ...
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5WhydoesmyHPbalancerhavetwokeyways

Why does my high-performance balancer have two keyways?

The additional keyway is they if you plan to use a high-volume supercharger. A second keyway needs to be machined in the crank snout. If you do not ...
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6Myengineismodifiedbutitstillhasfactorybalancer

My engine is modified but it still has the factory balancer. I want to upgrade, what performance bal...

The PowerBond™ by Dayco SS series uses the factory balance weights; The race balancer is for engines with zero balance. If you need help choosing the correct balancer for your engine build, please contact ...
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7IheardImayneedaPinInmyBalancer

I heard that I may need to pin my balancer, what does that mean?

On some late model GM engines, the balancer is a press fit instead of using a keyway to hold it in place. This works fine until a supercharger ...
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8Whatsthedifferencebetweeracingandstockbalancer

What are the differences between a stock harmonic balancer and a racing balancer?

The regular harmonic balancers are not meant for race cars but they offer engine builders and technicians a high-quality replacement to standard OEM balancers for everyday vehicles. Racing balancers are made ...
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9TheOEbalancerdoesnothavekeywaydaycounitdoes

The OE/stock balancer does not have a keyway and the PowerBond by Dayco harmonic balancer unit does....

The Dayco balancer fits a multitude of applications, some of which do require the keyway. If yours does not, you can fill in the keyway with silicone ...
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10Whataresignsthetensionerneedstobereplaced

What are signs the belt tensioner needs to be replaced?

A belt tensioner should be replaced if any of the following issues are noted: You hear noise or feel resistance as that could be a sign of potential ...
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11 8SignsaPulleyneestobereplaced

How do I know if a pulley is bad?

There are several signs a pulley is no longer functioning properly. First, check for free rock. There should be no movement or play from side to side. Next, ...
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Belt Tools Help Reduce Comebacks

Belt Tools Help Reduce Comebacks

At Dayco, we’ve learned that some technicians aren’t checking total system alignment, they are only checking the belt itself. Below we outline two tools that will help technicians ...
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FEADSystReplacementonHDTrucks

Front End Accessory Drive System Maintenance for Heavy-Duty Trucks

Just like many other components on today’s class 4-8 trucks, it’s important that mechanics look at the belt, pulley and tensioner as a whole system and replace all ...
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SignsATensionerNeedsReplacing3

Signs of a Bad Belt Tensioner

Often times during a drive belt change, the tensioner may get overlooked. This can be problematic given the tensioner has a big job to do and likely wears ...
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Solutionsfor ProblemDriveSystems

Problematic Automotive Belt Drive Systems

Automotive belt drive systems have become significantly more complicated over the past 25+ years. OEMs continue to add accessories and ...
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SolutionsforProblemDrives

Serpentine Belt Inspection

Most modern vehicles use serpentine belts that are now made with EPDM compounds. But EPDM belts wear differently than the earlier neoprene constructed belts ...
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How to Tell when an Idler or Tensioner Pulley Needs to be Replaced

How to Tell when an Idler or Tensioner Pulley Needs to be Replaced

Did you know that one of the most common causes of serpentine belt failure is a pulley with worn bearings? That’s because a pulley’s job is to maintain ...
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DiagnosingBeltNoise2

How to Fix Serpentine Belt Noise

If a newly installed serpentine belt  is making noise, it is a sign of a problem within the engine’s front end drive system. Serpentine belt noise is the ...
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The EvolutionofSerpBelts

The Evolution of Serpentine Belts

Over the past 25 years, serpentine belts have changed considerably. Vehicles used to have multiple serpentine belts that only had up to four points of contact. Today, serpentine ...
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ChoosingtheRightWaterPump

Choosing the Right Engine Water Pump

How do you know you are getting the best quality when it comes to choosing a water pump? Here’s a few tips: Pick a pump that is ...
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Replacement,Of,The,Water,Pump,Of,The,Car,,Two,Pumps

Automotive Water Pump Repair

The purpose of a car’s water pump is to push coolant through the car's engine block, radiator and hoses to help pull heat away from the system. Most frequently, ...
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1HowdoIuseLaserAlignmentTools

How do I use the Dayco laser alignment tool?

Unlike laser tools with attachments, Dayco’s tool has an aluminum body with magnets that secure it into the grooves of the reference pulley (usually the crankshaft pulley), ensuring ...
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2IUsedLaserAlignmentToolandStillGetNoise

I have used the laser tool a couple of times and still get a noise. What should I do?

The force of the belt being installed can often push a pulley out of alignment. When the system is relaxed, it might not be apparent. Start by checking ...
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1Howoftenshouldhosesbechanged

How often should vehicle hoses be replaced?

Most hoses require replacement – regardless of where they are at on a vehicle – once every four years. However, we recommend following the OE specifications on replacement ...
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2Howtotellifhoseisbad

How can I tell if a hose is bad?

It’s often difficult to look at a hose and know whether it’s faulty. Some physical signs a hose is bad is when it’s collapsed, broken, if it’s brittle ...
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