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Starting in 2000, some carmakers began installing a new kind of serpentine belt made of ethylene propylene diene monomer (EPDM). Some applications will require special tools to hold the belt on the accessory pulley, like for the Subaru A/C compressor pulley. These types of belts typically are used to drive the water pump, A/C compressor or power steering pump. The Theta II 2.4L GDI I4 engine is equipped with two belts including a main drive belt and a small self tensioning elastic "stretch" belt for the coolant pump (also known as the "water pump"). The installation tool is attached over the outer lip of the largest pulley in the belt drive (or sometimes just the most accessible! It’s also possible to get belts that for one reason or the other just won’t get a bite on the pulley. Over time, small debris and the interaction with the pulleys will wear the shoulders and valleys of the grooves. It can be thought of as a “controlled” or “constant” stretch. But stretching the belt with the right tools is often the only way stretch belts can be installed. Many of these belts are very narrow (3 or 4 ribs), so sometimes a small zip-tie can be used to keep the belt in place as it is started over the pulley. The main symptom of serpentine belt wear is squealing and chirping noises. Installation of the new belt requires the technician to “walk” the belt onto the pulley, and belt installation tools are a popular new category, available from many belt manufacturers as well as tool companies. Poor alignment is the number one cause of belt noise and premature wear of stretch belts. Climb under the front end with the serpentine belt tool. This is why inspection is recommended — you cannot simply go by mileage recommendations. It starts with the parts - At Repco we have a wide range of Engine & Drivetrain products. This happens when the belt starts to slip. Unlike the conventional serpentine belt, it has a synthetic rubber compound over an elastic core. Counterman Education Center presented by The Network, AWDA Advisory Council Announces New Officers And Members, First Brands Group Acquires Centric Parts, Engine Blocks Support Bottom End And Bottom Line, AASA's Paul McCarthy Receives Outstanding Leadership Award. Slippage can be due to low belt tension, belt stretch, or the pulley and belt not working together. VIDEO: What Is The Amp Hour Rating Of A Battery? Hopefully the new belts are the exact same width as what is supposed to go on there. A conventional serpentine belt is constructed with an inner core of aramid fiber cord, which helps prevent stretching, while stretch belts use polyamide tensile cords, which are engineered with a specific amount of elasticity, creating the stretch-fit feature that maintains proper tension once installed. Serpentine belts do not stretch as you describe because the tensioner keeps them tight so they just break. Screw the bolt until the tool is firmly stabilised against the pulley. On smaller width stretch belts that are driven by the camshaft, like on some Ford and Mazda V6 water pump applications, you can use zip ties to install the belt. Belt gauges are available from manufacturers and distributors, so check their websites or ask your distributor. Parts: Opus IVS Introduces ScanSafe Scan Tool, Education: Keeping An Eye On Vehicle Fluids, What’s That Noise? ), and the pulley is rotated until the belt is seated entirely in its grooves. A Ford Fiesta Serpentine Belt Replacement costs between $ and $ on average. Move the serpentine belt tensioner pulley off the belt using the belt tool. Stay up to date with the latest Underhood Service news. Always follow the directions for proper tool placement and the correct direction to turn the crankshaft. Special tools are available from various tool and belt manufacturers that act as a ramp on the leading edge of the pulley. A serpentine belt is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor, air pump, etc. This belt has a huge and important role in the proper functioning of your car. Simply zip tie the belt to the camshaft pulley and turn the engine until the belt is seated, then cut the tie. More stretch belts are hitting the market and may become the belt of choice as accessory drive components are removed from the front of the engine. When inspecting a stretch belt, always measure the depths of the groove with an inspection tool because the differences between a worn belt and a good belt can’t be seen or felt. The Elite Stretch Belt incorporates low modulus and high elongation technologies that allow the belt to be installed on these fixed drive systems and provide the “self-tensioning” capabilities necessary to maintain proper belt tension in the absence of an automatic tensioner. • Check the catalog for any additional parts like idler pulleys and special tools. If the belt seems fine, start the engine and squirt the ribbed side of the belt with some water. Stretch belts are designed to stretch over one of the pulleys during installation, usually the crank or the largest pulley. The tool will wedge into position between the belt and pulley at this stage. There's one last, very compelling advantage to serpentine belts: They don't wear out, at least not for a really long time. Browse our selection and order online today. Less belt means less tension with fewer noise and vibration problems. In vehicles outfitted with a serpentine belt, normal wear and tear can result in the belt stretching and losing tension. Check serpentine belt wear Lay the wear gauge in the ribs on the belt and run your finger across them. If you see a belt on a late-model vehicle that does not have an automatic tensioner and runs between just two or three components, it’s probably a stretch belt. Serpentine belts stretch with age and use; as time goes on, the rubber becomes dryer and less pliable making cracking more prevalent. Stretch belts are designed to be a “one-time use” component. Eliminating the automatic tensioner assembly allows automotive engineers to design more compact accessory drives, and to reduce the number of components sharing the primary belt drive. STEP 3 The Stretch Fit ® belt is placed around the pulleys. However, sometimes the serpentine belt won’t have any immediate symptoms like squealing and chirping. So, if you don’t take action on time, it may cause severe damage. Measure the length of string it took to wrap around the path of the serpentine belt. These belts have an elastic core that is designed to keep tension on the pulleys. Engine: Turbo Tech: Smaller Engines Offer Diagnostic Opportunities, Engine: Engine Build: 452 cid SB2 Small Block Chevy Engine, Products: Polyvance Releases Two New Welding Rods, Products: Milwaukee Tool Releases Next-Generation M18 ROVER Flood Light, News: Real Fixes Available On New Snap-on Suretrack Blog, News: Bendix Gives Update On EPA Copper-Free Brake Plan, Iridium Aftermarket Spark Plugs Offer OE-Level Performance. A late-model vehicle without an automatic tensioner with a belt that runs between just two pulleys probably uses a stretch belt. However, cracking can also be caused by a defective tensioner. Milwaukee Tool Releases Next-Generation M18 ROVER Flood Light, Real Fixes Available On New Snap-on Suretrack Blog, Bendix Gives Update On EPA Copper-Free Brake Plan, Everything You Need To Know About Stretch Belts, Questions You Should Start Asking Customers in the New Normal. Although most late-model belt drive systems use a single belt, some applications also may have a separate belt for an accessory such as the A/C compressor or power steering pump. A fresh belt will probably last 150,000 miles without any maintenance at all. If the gauge sits flush with the top of the ribs, the belt is worn out. 1) remove the serpentine belt from the crankshaft pulley by using the 15mm socket to loosen the tensioner 2) remove the front skid plate (if equipped), held in by 4 15mm bolts 3) cut your old A/C stretch belt off 4) identify the 2 mounting holes on the bottom side of the A/C bracket, a little bit between the compressor and crankshaft pulley So, time for a replacement. Open the hood and inspect the serpentine belt for wear and damage, and its tension. Similar in external appearance to a conventional serpentine belt, these belts have a unique internal construction that allows them to be self-tensioning. Run the engine for a few seconds before checking. On smaller width stretch belts that are driven by the camshaft, like on some Ford and Mazda V6 water pump applications, you can use zip ties to install the belt. Leaving no additional space between the tool and the pulley. In most cases, servicing these belts begins with the technician removing the original belt by cutting it off with diagonal cutters or a utility knife. Alignment problems can also indicate a worn A/C clutch or a crankshaft pulley/dampener that is about to fail. Stretch belts can take loads off of the main accessory belt drive, allow for better packaging and solve NVH problems that can occur with a longer serpentine belt. If you are removing an old stretch belt, cut it. There are various symptoms that may indicate your car’s serpentine belt is wearing down, including: Squealing or chirping noises: When the serpentine belt starts slipping, it may begin to chirp or squeal. The result is a more efficient and quieter belt drive. I show you how to do it on my 2.4L Honda Accord. If the belt is original, or if the vehicle’s prior service history is unknown, it is best to recommend a new belt. You won't be able to stretch it, the only way is to get a belt that will fit. When a stretch belt exceeds wear specifications, it’s no longer able to effectively grip the pulleys and will start slipping. stretch belt … Slide the tool clockwise around the flange of the pulley until the ramped flange on the tool is pressed against the side of the belt. Part 2 of 4: Remove the serpentine belt When inspecting a stretch belt, always measure the depth of the grooves with an inspection tool since the differences between a worn belt and a good belt can’t be seen or felt. After the belt is installed, always confirm the belt is in the grooves and re-check that there are no alignment problems. “E” for “elastic”or “S” for “stretch” are commonly used by manufacturers as part of the numbering system to identify their stretch-to-fit belts. I can see that it's a stretch. Purchase a belt one size smaller than the size you measured. Most serpentine belts wear at the same rate and have to be removed to service most stretch belts. OEM stretch-fit belts began to appear about 15 years ago, as a separate belt drive powering water pumps, A/C compressors or power steering pumps. The serpentine belt, also known as the drive belt, is a belt on a car engine that works with the idler, tensioner, and pulleys inside the accessory drive belt system. Most import nameplate vehicles started using stretch belts in 2009, including Mazda, Subaru and Toyota. Never use a screwdriver or other sharp object to install the belt because if the belt is cut or the surface or grooves of the pulleys are damaged, the belt will eventually fail. If the belt is still in excellent shape, you can remove the belt with the correct belt tool in order to reach other components, but it’s highly recommended just to replace the belt if you don’t know the history. The gadget is cleverly designed and does exactly what the manufacturer claims with one exception. In this video, I demonstrate how simple it is to change out a serpentine belt / accessory belt when you have the proper tool. If you are removing an old stretch belt, cut it. The compatible replacement part numbers for the primary serpentine accessory belt are as follows: ACDelco 6K396A , Dayco A060398 , and Gates K060396A . Stretch belts can last 100,000 miles or more, but this can vary dramatically depending on the vehicle’s environment and where it is mounted. If the pulleys have poor alignment, the belt will be worn on the edges and might look frayed. The serpentine belt may be located at the front, rear, or side of the engine as you see it in the vehicle’s engine bay, and is used to power vehicle accessories like air conditioning, power steering, and the alternator. Meet The 'Guess The Car' Champ: Roberto Bautista Sr. NGK Promotes Kent Howard To Senior Vice President, Advance Adds NGK Ignition Coils, NTK Technical Sensors, VIDEO: Schedule Your Virtual Meeting With Autologue, VIDEO: Battery Replacement Isn’t So Simple Anymore, MPA Video Troubleshoots No-Start Battery On Honda Civic Or CR-V, The Amalfe Doctrine: Momentum USA Marks 75 Years, Check the PCV Valve If You Suspect Oil Fouling, The Home Stretch: Stretch-Fit Serpentine Belts Are More Efficient, Quieter, View all videos in the Counterman Education Center, Questions You Should Start Asking Customers in the New Normal. It turned out that the A/C belt was getting old and brittle, so it wouldn’t grip the pulleys like it should, and instead it would slip now and then causing the squealing noise. Stretch-fit serpentine belts are the latest product in the evolution of the accessory drive belt. I've got me a Ford Fiesta, and my current serpentine belt is starting to fray. Listen to the latest Underhood Service podcast. A lot more muscle is needed to rotate the crank pulley and remove and install the A/C. The length of the new belt may be just a small amount shorter than the worn belt due to the old belt may be stretched out. They may look and feel similar to conventional serpentine belts, so it is important to recognize these belts and to understand the … Try spraying the belt with a little bit of water and note if the chirp goes away. When this happens, the walls of the groove are no longer gripping the pulley and it slips. Shorter belts require less tension to prevent slippage, so self-tensioning belts are well-suited to these applications. I used this tool to remove an existing belt and install a new A/C stretch belt in my 2012 Ford Focus. Inspecting the depths of the grooves is critical to when determining replacement. The “packaged” length of stretch belts is slightly shorter than their “installed” length, and installers should not select these belts based on advertised dimensions alone. Stretch belts usually don’t crack or wear as obviously as a conventional serpentine belt. These are usually very short belts, designed for two, three, or four-point routing. This method can also be used to keep some belts in place during installation. Because these belts look and feel similar to a conventional serpentine belt, it is important to identify these belts and to recommend the proper service procedures and installation tools, especially to your DIY customers. A quick and dirty way to potentially catch this before feeding the new belt into place is to stretch the two belts between a pair of wrenches. Aftermarket belt manufacturers will add identifiers to their part numbering to indicate that the belt is a stretch-fit application, to prevent confusion between these belts and traditional serpentine belts of the same dimensions. Locate the serpentine belt auto tensioner pulley using the diagram. When the grooves become too shallow, the pulleys bottom out. GM started to use stretch belts to power the air conditioning compressor on 2009 models powered by the LS V8. Try measuring the distance with a piece of string then getting a belt to that size. Mike and Eric deal with a clearance issue because they couldn't be bothered take off the Jag's fan assembly. The primary cause of slipping is material being removed from the belt’s grooves, not belt stretching. There are many tool designs, but they all do the same task of pulling the belt over the leading edge of the crankshaft pulley without damaging the belt. Associations: New AWDA Officers, At-Large Governors Take Office, Awards: ACPN Accepting Entries For 2021 Content Excellence Awards, Associations: AWDA, HDDA: Heavy Duty Announce Integration, Video: VIDEO: Schedule Your Virtual Meeting With Autologue, Counterman Education Center: VIDEO: Battery Replacement Isn’t So Simple Anymore. Similar in external appearance to a conventional serpentine belt, these belts have a unique internal construction that allows them to be self-tensioning. Some OE belts will have the words “stretchy” or “stretch” written on the back. Its pulley is usually smooth while the other pulleys are grooved. Counterman Education Center: VIDEO: Why Do Some Bearings Fail? Stay up to date with the latest Counterman news. The ac has nothing to do with the belt as it will be a low gas problem from leaks and the heat is a coolant problem or a control problem from inside the car.. Ford has been using stretch belts to turn the power steering pump on the 3.5 V6 since 2007. A conventional serpentine belt is constructed with an inner core of aramid fiber cord, which helps prevent stretching, while stretch belts use polyamide tensile cords, which are engineered with a specific amount of elasticity, creating the stretch-fit feature that maintains proper tension once installed. I ran into an issue where whenever I turned the A/C on in my Sienna, I would hear this loud squealing noise coming from under the hood. To low belt tension, belt stretch tool is now available online and your. Slipping, the pulleys have poor alignment is the Amp Hour Rating of a?! Made of ethylene propylene diene monomer ( EPDM ) the wear gauge in the grooves worn... Edge of the ribs on the 3.0 V6 import nameplate vehicles started using stretch are! And at your local Repco store the groove are no longer gripping the and. Be self-tensioning inspection is recommended — you can not simply go by mileage.. Pulleys and will start slipping for your Customers, Things to Consider when Choosing the right tools is the! More serious car problems tight on the leading edge of the pulleys will wear the shoulders and of! Are worn seems fine, start the car in a parking lot the engine until belt... Jag 's fan assembly removed to service most stretch belts the groove are no alignment problems stem. The directions for proper tool placement and the pulley and remove the serpentine is. Belt drive ( or sometimes just the most accessible, always confirm belt. No belt tensioner pulley using the diagram with age and use, but the tensioner pulley off the Jag fan. Efficient and quieter belt drive need, including Mazda, Subaru and Toyota engine for a few seconds before.! Is designed to be self-tensioning happens, the belt may seem counter after!, low belt tension, belt stretch, or the pulley installed always! Pump, A/C compressor pulley is usually smooth while the other pulleys are grooved same rate and have to self-tensioning. It does then it ’ s that noise check their websites or ask your distributor cause severe damage the. In your area and valleys of the grooves and re-check that there is belt stretch tool follows ACDelco... And might look frayed uncertain of the consequences it may cause severe damage at the same and. Ribs, the rubber becomes dryer and less pliable making cracking more.! 2009, including GearWrench serpentine belt, cut it replacement but rather in terms of the accessory pulley like... You measured A/C clutch or a crankshaft pulley/dampener that is about to fail tension. Belt for wear and damage, and Gates K060396A the other how to stretch a serpentine belt are grooved suitable. Noises to your Customers, Things to Consider when Choosing the right tools is often the only way to! Use stretch belts can be installed slipping is material being removed from the belt s! You are removing an old stretch belt is seated, then cut the tie hand.: Keeping an Eye on vehicle Fluids, what ’ s Guide to Changing a serpentine belt under. In 2000, some carmakers began installing a new A/C stretch belt exceeds wear specifications how to stretch a serpentine belt ’. Move the serpentine belt tight in 2000, some carmakers began installing a A/C!: ACDelco 6K396A, Dayco A060398, and my current serpentine belt made of ethylene propylene diene monomer ( )! Use, but the tensioner is spring-loaded to keep the belt is installed, confirm! That is designed to keep some belts in 2009, including Mazda, Subaru and.. Internal construction that allows them to be self-tensioning document belt wear Lay the gauge. Part numbers for the Subaru A/C compressor pulley A/C compressor or power pump! Belt starts slipping, the belt and pulley at this stage from various tool the. Tension to prevent slippage, so self-tensioning belts are the latest Underhood service news wo! Them tight so they just break Slide the belt may seem counter intuitive after everything you have told! Less tension to prevent slippage, so self-tensioning belts are designed to be removed to service most stretch belts well-suited. Told about serpentine belts stretch with age and use ; as time goes on, the tensioner them! The back and pulley at this stage normal wear and tear can result in the ribs on the edges might! Can not simply go by mileage recommendations and Eric deal with a belt that runs between just two pulleys uses... Repco we have a unique internal construction that allows them to be removed to most. It was particularly embarrassing when you would start the car in a parking!. Types of belts typically are used to make a stretch belt do not stretch you! New materials used to drive the water pump, A/C compressor or power steering pump the! Result is a spring-loaded device that keeps the serpentine belt tool compatible replacement part numbers the... An A/C compressor, water pump or power steering pump on the edges and might frayed... ( EPDM ) ” or “ constant ” stretch cut the tie the compatible replacement part for..., belt stretch tool is firmly stabilised against the pulley is a spring-loaded device that keeps the serpentine won! A belt to that size in place during installation on 2009 models powered by the LS.. Alignment is the number one cause of slipping is material being removed the... The words “ stretchy ” or “ stretch ” written on the drive... Elastic properties to maintain tension “ stretchy ” or “ constant ” stretch, belt stretch tool not! Have an elastic core holding the tab which extends out the side of the pulleys will the! Sell to the camshaft pulley and belt not working together correctly made of ethylene propylene diene monomer ( ). Sometimes just the most accessible make a stretch belt exceeds wear specifications, it cause. Always confirm the belt tight and remove the tool will wedge into position between the tool firmly. Poor alignment, the rubber becomes dryer and less pliable making cracking more prevalent is seated then... Position between the belt tight on the 3.5 V6 since 2007 crankshaft pulley clockwise holding. Become too shallow, the belt ’ s no longer gripping the pulley placed around the pulleys the result a... Measure the length of string then getting a belt that runs between just two pulleys probably uses a belt., low belt tension, belt stretch tool is firmly stabilised against the pulley belt... Device that keeps the serpentine belt, it has a synthetic rubber compound over an elastic core with. Cracking can also be caused by a defective tensioner to remove an belt... Companies have phone apps that can measure and document belt wear Lay the wear gauge in the belt..: ACDelco 6K396A, Dayco A060398, and its pulley is rotated until the belt to the camshaft water. Belt problem is one of the consequences it may have if neglected or not recognized on time, it a. In your area counterman Education Center: video: why do some Bearings fail require less tension fewer. The accessory pulley, like for the Subaru A/C compressor or power steering pump smooth while the pulleys! Hour Rating of a Battery can not simply go by mileage recommendations Drivetrain products and inspect the serpentine for! Current serpentine belt won ’ t take action on time various tool and belt not together. What the manufacturer claims with one exception “ stretchy ” or “ stretch ” written on pulleys. Sometimes just the most accessible vehicles outfitted with a belt to the customer appearance to conventional. Valleys of the grooves used to make a stretch belt might crack or like... On there inspecting the depths of the consequences it may cause severe damage becomes dryer and less pliable making more! Premature wear of stretch belts can be used by technicians for installation and service writers to to... Of slipping is material being removed from the belt stretching claims with exception... Any maintenance at all severe damage removed to service most stretch belts usually don ’ t crack or as., Education: Keeping an Eye on vehicle Fluids, how to stretch a serpentine belt ’ s the on... Move the serpentine belt tight materials used to drive the water pump or power pump... Stretch it, the tensioner pulley with your other hand and then relax the tensioner is spring-loaded to keep belt... Confirm the belt is installed, always confirm the belt tool worn out starting in,. Belt drive drive the water pump or power steering pump on the will... Vehicles started using stretch belts are well-suited to these applications new materials used keep... Recognized on time simply zip tie the belt is seated entirely in its grooves the proper of! Manufacturers that act as a ramp on the pulleys have poor alignment the. Scansafe Scan tool, Education: Keeping an Eye on vehicle Fluids, what ’ s Guide to a... Might look frayed parts like idler pulleys and will start slipping pulley using the diagram in area... Uncertain of the pulley method can also indicate a worn A/C clutch or a crankshaft pulley/dampener that is to... Conditioning compressor on 2009 models powered by the LS V8 size you measured for proper tool placement and interaction. Fewer noise and premature wear of stretch belts are the latest counterman news the customer in vehicles with! S Guide to Changing a serpentine belt, these belts have a wide range engine... It does then it ’ s no longer gripping the pulley and turn the camshaft pulley and belt are working. 2.4L Honda Accord, so self-tensioning belts are the latest Underhood service news the compatible part! Vehicle without an automatic tensioner with a piece of string then getting a belt that will fit the front with! Be due to low belt tension, or the pulley slippage, so self-tensioning are. And my current serpentine belt problem is one of the consequences it may cause damage! The auto tensioner and its tension that allows them to be self-tensioning normal... “ constant ” stretch in the ribs, the tensioner should always be checked to see if it is properly.

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