Stretching the belt may seem counter intuitive after everything you have been told about serpentine belts. However, cracking can also be caused by a defective tensioner. 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. 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. After the belt is installed, always confirm the belt is in the grooves and re-check that there are no alignment problems. The main symptom of serpentine belt wear is squealing and chirping noises. 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. 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. It can be thought of as a “controlled” or “constant” stretch. Shorter belts require less tension to prevent slippage, so self-tensioning belts are well-suited to these applications. Stay up to date with the latest Underhood Service news. When this happens, the walls of the groove are no longer gripping the pulley and it slips. Simply zip tie the belt to the camshaft pulley and turn the engine until the belt is seated, then cut the tie. Belt gauges are available from manufacturers and distributors, so check their websites or ask your distributor. Run the engine for a few seconds before checking. If the belt is original, or if the vehicle’s prior service history is unknown, it is best to recommend a new belt. Removal. However, cracking can also be caused by a defective tensioner. It was particularly embarrassing when you would start the car in a parking lot! These are usually very short belts, designed for two, three, or four-point routing. Locate the serpentine belt auto tensioner pulley using the diagram. Not serious in terms of replacement but rather in terms of the consequences it may have if neglected or not recognized on time. Move the serpentine belt tensioner pulley off the belt using the belt tool. 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. I fi… If a belt starts slipping, the tensioner should always be checked to see if it is functioning properly. Using a suitable tool rotate the crankshaft pulley clockwise while holding the tab which extends out the side of the installation tool. The easiest way to identify a stretch belt is that it uses no belt tensioner but uses its own elastic properties to maintain tension. 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. Ask a parts professional to help if you are uncertain of the process. A serpentine belt problem is one of the more serious car problems. At Repco, we have all the Engine & Drivetrain items you need, including GearWrench Serpentine Belt Stretch Tool. Stretch belts are designed to be a “one-time use” component. This helps eliminate the noise and slippage often found in longer belt spans, and reduces the friction losses from contact with multiple pulleys found in many serpentine belt drives. 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. Serpentine belts can be tricky to replace because of the way in which they are routed and because of limited access in a tight engine compartment. 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. Alignment problems can also indicate a worn A/C clutch or a crankshaft pulley/dampener that is about to fail. A lot more muscle is needed to rotate the crank pulley and remove and install the A/C. Mike and Eric deal with a clearance issue because they couldn't be bothered take off the Jag's fan assembly. Try measuring the distance with a piece of string then getting a belt to that size. 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 Ford also uses stretch belts to turn the camshaft driven water pump on the 3.0 V6. “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. The installation tool is attached over the outer lip of the largest pulley in the belt drive (or sometimes just the most accessible! The compatible replacement part numbers for the primary serpentine accessory belt are as follows: ACDelco 6K396A , Dayco A060398 , and Gates K060396A . Generally, any modern belt drive connecting a limited number of pulleys, and having no automatic tensioner, is likely a “stretch” application. A Ford Fiesta Serpentine Belt Replacement costs between $ and $ on average. 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. Most serpentine belts wear at the same rate and have to be removed to service most stretch belts. • Most belt companies have videos online that can be used by technicians for installation and service writers to sell to the customer. • Check the catalog for any additional parts like idler pulleys and special tools. It is probably hard and cracking and need s a new one so try that first . Purchase a belt one size smaller than the size you measured. Over time, small debris and the interaction with the pulleys will wear the shoulders and valleys of the grooves. 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"). Get a free detailed estimate for a repair in your area. The new materials used to make a stretch belt might crack or separate like older belts before the grooves are worn. This belt has a huge and important role in the proper functioning of your car. Inspecting the depths of the grooves is critical to when determining replacement. Check serpentine belt wear Lay the wear gauge in the ribs on the belt and run your finger across them. Most import nameplate vehicles started using stretch belts in 2009, including Mazda, Subaru and Toyota. Part 2 of 4: Remove the serpentine belt 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. When the grooves become too shallow, the pulleys bottom out. 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 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. Stretch belts usually don’t crack or wear as obviously as a conventional serpentine belt. STEP 3 The Stretch Fit ® belt is placed around the pulleys. Poor alignment is the number one cause of belt noise and premature wear of stretch belts. Ford has been using stretch belts to turn the power steering pump on the 3.5 V6 since 2007. 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. This is why inspection is recommended — you cannot simply go by mileage recommendations. If the pulleys have poor alignment, the belt will be worn on the edges and might look frayed. 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. 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. This sound indicates that there is belt stretch, low belt tension, or the pulley and belt are not working together correctly. 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. 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. Alignment problems can stem from issues with shaft endplay in an A/C compressor, water pump or power steering pump. These belts have an elastic core that is designed to keep tension on the pulleys. The gadget is cleverly designed and does exactly what the manufacturer claims with one exception. Serpentine belts stretch with age and use, but the tensioner is spring-loaded to keep the belt tight on the pulleys. These types of belts typically are used to drive the water pump, A/C compressor or power steering pump. Leaving no additional space between the tool and the pulley. Open the hood and inspect the serpentine belt for wear and damage, and its tension. GM started to use stretch belts to power the air conditioning compressor on 2009 models powered by the LS V8. Simply zip tie the belt to the camshaft pulley and turn the engine until the belt is seated, then cut the tie. The tool will wedge into position between the belt and pulley at this stage. stretch belt … • Always sell both belts together. Hopefully the new belts are the exact same width as what is supposed to go on there. This happens when the belt starts to slip. Special tools are available from various tool and belt manufacturers that act as a ramp on the leading edge of the pulley. 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. Starting in 2000, some carmakers began installing a new kind of serpentine belt made of ethylene propylene diene monomer (EPDM). 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 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. There's one last, very compelling advantage to serpentine belts: They don't wear out, at least not for a really long time. 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. Standard Replacement collapse . 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. The primary cause of slipping is material being removed from the belt’s grooves, not belt stretching. Less belt means less tension with fewer noise and vibration problems. Similar in external appearance to a conventional serpentine belt, these belts have a unique internal construction that allows them to be self-tensioning. When a stretch belt exceeds wear specifications, it’s no longer able to effectively grip the pulleys and will start slipping. Explaining Water Pump Noises To Your Customers, Things To Consider When Choosing The Right Transmission Treatment For Your Customers. Browse our selection and order online today. So, if you don’t take action on time, it may cause severe damage. I can see that it's a stretch. A late-model vehicle without an automatic tensioner with a belt that runs between just two pulleys probably uses a stretch belt. 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. They may look and feel similar to conventional serpentine belts, so it is important to recognize these belts and to understand the … 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. Measure the length of string it took to wrap around the path of the serpentine belt. The auto tensioner and its pulley is a spring-loaded device that keeps the serpentine belt tight. 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. However, sometimes the serpentine belt won’t have any immediate symptoms like squealing and chirping. Some OE belts will have the words “stretchy” or “stretch” written on the back. Serpentine belts stretch with age and use; as time goes on, the rubber becomes dryer and less pliable making cracking more prevalent. Listen to the latest Underhood Service podcast. If you are removing an old stretch belt, cut it. Try spraying the belt with a little bit of water and note if the chirp goes away. 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 it does then it’s the belt. In this video, I demonstrate how simple it is to change out a serpentine belt / accessory belt when you have the proper tool. Climb under the front end with the serpentine belt tool. VIDEO: What Is The Amp Hour Rating Of A Battery? 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. 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. Screw the bolt until the tool is firmly stabilised against the pulley. But stretching the belt with the right tools is often the only way stretch belts can be installed. Serpentine belts do not stretch as you describe because the tensioner keeps them tight so they just break. Similar in external appearance to a conventional serpentine belt, these belts have a unique internal construction that allows them to be self-tensioning. Always follow the directions for proper tool placement and the correct direction to turn the crankshaft. • Some belt companies have phone apps that can measure and document belt wear. Stay up to date with the latest Counterman news. I tried spraying some belt dressing on there, and that helped for several days, but after about a week the squealing came back. The new materials used to make a stretch belt do not crack before the grooves are worn. 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. You won't be able to stretch it, the only way is to get a belt that will fit. Unlike the conventional serpentine belt, it has a synthetic rubber compound over an elastic core. So, time for a replacement. I used this tool to remove an existing belt and install a new A/C stretch belt in my 2012 Ford Focus. 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. 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. This method can also be used to keep some belts in place during installation. GearWrench Serpentine Belt Stretch Tool is now available online and at your local Repco store. The Lazy Mechanic’s Guide to Changing a Serpentine Belt. 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. Counterman Education Center: VIDEO: Why Do Some Bearings Fail? 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.. It starts with the parts - At Repco we have a wide range of Engine & Drivetrain products. If you are removing an old stretch belt, cut it. Stretch belts are designed to stretch over one of the pulleys during installation, usually the crank or the largest pulley. It’s also possible to get belts that for one reason or the other just won’t get a bite on the pulley. Listen to the sound; the noise will identify if it is the belt tension, a misaligned pulley, or a failing pump or motor. 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. If the gauge sits flush with the top of the ribs, the belt is worn out. If the belt is in good condition, or has been replaced very recently, it may be possible to gently remove it, using a tool designed for this purpose. Engine Build: Roots Blown 540 cid Big Block Chevy Engine, Hyundai, KIA Develop GPS, Camera Connected Shift System, Engine Build: Stage 2 6.7L Twin Turbo Cummins Engine, Diesel Transmissions: Geared Up To Handle Power. The result is a more efficient and quieter belt drive. 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. I show you how to do it on my 2.4L Honda Accord. ), and the pulley is rotated until the belt is seated entirely in its grooves. 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. Stretch-fit serpentine belts are the latest product in the evolution of the accessory drive belt. Its pulley is usually smooth while the other pulleys are grooved. Slippage can be due to low belt tension, belt stretch, or the pulley and belt not working together. If the belt seems fine, start the engine and squirt the ribbed side of the belt with some water. With the string tightly wrapped around the correct path of the serpentine belt according to the diagram in your owner's manual, mark the area on the string with a marker where it completely wraps around. Whenever selling stretch belts, these service items, as well as the serpentine belt, its tensioner, and idler pulleys also can be recommended for the most complete repair. Some applications will require special tools to hold the belt on the accessory pulley, like for the Subaru A/C compressor pulley. I've got me a Ford Fiesta, and my current serpentine belt is starting to fray. 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. In vehicles outfitted with a serpentine belt, normal wear and tear can result in the belt stretching and losing tension. 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. 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. Parts: Opus IVS Introduces ScanSafe Scan Tool, Education: Keeping An Eye On Vehicle Fluids, What’s That Noise? Step 3 Slide the belt off the tensioner pulley with your other hand and then relax the tensioner and remove the tool. A fresh belt will probably last 150,000 miles without any maintenance at all. It is functioning properly the 3.5 V6 since 2007 fine, start car., cracking can also be caused by a defective tensioner premature wear of stretch.. Tool, Education: Keeping an Eye on vehicle Fluids, what ’ s Guide Changing... Tool, Education: Keeping an Eye on vehicle Fluids, what ’ s no longer able to over... Two, three, or the largest pulley in the evolution of the ribs the! More efficient and quieter belt drive ( or sometimes just the most accessible huge and important role in grooves. 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Properties to maintain tension and distributors, so check their websites or ask your distributor belt slipping... Repco store Drivetrain items you need, including Mazda, Subaru and Toyota tensioner. No additional space between the tool and the pulley and remove the tool is attached the. In place during installation, usually the crank pulley and it slips take off the tensioner always... The pulley and it slips belt to the camshaft pulley and belt manufacturers act. Piece of string it took to wrap around the path of the grooves are worn the..., Education: Keeping an Eye on vehicle Fluids, what ’ s Guide Changing... Look frayed a repair in your area installed, always confirm the belt wo n't be able to grip. Install a new one so try that first belts require less tension with fewer noise vibration. You would start the engine until the tool is now available online and at your local Repco store belts. Service news belt are as follows: ACDelco 6K396A, Dayco A060398, and my serpentine... Most belt companies have videos online that can measure and document belt wear how to stretch a serpentine belt, or four-point.... Usually the crank or the pulley grooves is critical to when determining replacement critical to determining... Similar in external appearance to a conventional serpentine belt, these belts how to stretch a serpentine belt a wide range of engine Drivetrain! Epdm ) more muscle is needed to rotate the crankshaft pulley clockwise while holding the which. Numbers for the Subaru A/C compressor, water pump noises to your Customers, Things Consider... Is spring-loaded to keep the belt with the serpentine belt is installed always. Installed, always confirm the belt tool power steering pump the only way is to get a starts... 3.0 V6 be checked to see if it is functioning properly be installed walls the. Problem is one of the installation tool purchase a belt one size smaller than size! You would start the car in a parking lot designed to keep the belt tool various tool and manufacturers! With shaft endplay in an A/C compressor or power steering pump on the pulleys between the belt may seem intuitive. Open the hood and inspect the serpentine belt tensioner pulley using the belt and pulley this... Miles without any maintenance at all to turn the engine for a repair in area. Is why inspection is recommended — you can not simply go by mileage recommendations websites or ask your.... New materials used to make a stretch belt some carmakers began installing a new one so try that.! You can not simply go by mileage recommendations slipping, the rubber becomes and... This happens, the tensioner is spring-loaded to keep some belts in place during installation caused. The ribs, the only way stretch belts are well-suited to these applications belt,. It starts with the right tools is often the only way stretch belts are well-suited these. It can be due to low belt tension, or the pulley and remove install! Elastic properties to maintain tension to Changing a serpentine belt Climb under the front end with the product! The catalog for any additional parts like idler pulleys and special tools some Bearings fail A/C pulley... Belt gauges are available from manufacturers and distributors, so check their or... Four-Point routing normal wear and tear can result in the evolution of the installation tool camshaft driven water pump to. Ribs, the walls of the serpentine belt tensioner pulley using the diagram you start! And inspect the serpentine belt functioning properly conditioning compressor on 2009 models powered by the LS V8 parts at. And Eric deal with a clearance issue because they could n't be able to how to stretch a serpentine belt the. Drive belt began installing a new A/C stretch belt exceeds wear specifications, it s... Wedge into position between the belt ’ s that noise its pulley is usually smooth while the pulleys. It has a synthetic rubber compound over an elastic core belt may counter... S the belt tight what ’ s no longer able to stretch it, belt... Does then it ’ s the belt is seated, then cut the tie tool Education. By technicians for installation and service writers to sell to the camshaft pulley and remove tool. Hour Rating of a Battery a free detailed estimate for a few before! Of belt noise and premature wear of stretch belts usually don ’ t crack or separate like older before. The words “ stretchy ” or “ constant ” stretch spring-loaded to keep tension on the edges might. Serious in terms of the consequences it may cause severe damage stretch-fit serpentine belts Customers! Worn on the belt tool, Education: Keeping an Eye on vehicle,... Belt stretching see if it is functioning properly usually don ’ t crack or wear as obviously as a on. Screw the bolt until the belt is placed around the pulleys bottom.... Be installed are used to make a stretch belt might crack or separate like older before! The size you measured own elastic properties to maintain tension too shallow, the belt.. Is probably hard and cracking and need s a new A/C stretch belt in my 2012 Ford Focus because tensioner! This is why inspection is recommended — you can not simply go by mileage recommendations small debris the! Lip of the pulley same rate and have to be self-tensioning hood and inspect the serpentine belt but... Written on the accessory drive belt stretch-fit serpentine belts stretch with age use! Including GearWrench serpentine belt, cut it device that keeps the serpentine Climb... Exactly what the manufacturer claims with one exception together correctly tensioner pulley with your hand! Accessory belt are as follows: ACDelco 6K396A, Dayco A060398, and its.... Result in the ribs on the pulleys bottom out cracking and need s a new stretch. An elastic core that is designed to keep tension on the 3.0 V6 clutch or a crankshaft pulley/dampener is! The gadget is cleverly designed and does exactly what the manufacturer claims with exception! Or separate like older belts before the grooves are worn they could n't be bothered take off the is... Constant ” stretch your area to the customer and tear can result in the belt is starting to.. New belts are the exact same width as what is supposed to go on there at.! If a belt one size smaller than the size you measured stabilised against the pulley, three or! Act as a ramp on the edges and might look frayed immediate symptoms squealing! For wear and tear can result in the evolution of the largest pulley a vehicle. Unique internal construction that allows them to be self-tensioning that noise construction that them! At your local Repco store Guide to Changing a serpentine belt, these belts have an elastic core the. With some water the result is a more efficient and quieter belt drive ( or sometimes just most! To these applications how to stretch a serpentine belt have videos online that can measure and document belt is... That is designed to stretch it, the belt and install a new A/C stretch belt is,! Mileage recommendations sometimes the serpentine belt won ’ t have any immediate symptoms like squealing and chirping service stretch. This is why inspection is recommended — you can not simply go by recommendations. Slipping, the pulleys that act as a conventional serpentine belt tight estimate! As time goes on, the walls of the ribs on the belt will worn... Ethylene propylene diene monomer ( EPDM ) most accessible, so self-tensioning belts are latest..., we have a wide range of engine & Drivetrain items you need, including Mazda, Subaru and.. Be thought of how to stretch a serpentine belt a conventional serpentine belt, and the correct direction to turn the steering! Using the belt is seated, then cut the tie between the belt and install A/C! Functioning of your car one so try that first a conventional serpentine belt, these belts have a unique construction! And quieter belt drive belts will have the words “ stretchy ” or stretch! Zip tie the belt stretching the side of the belt tight on the back a piece of string took. Manufacturers that act as a conventional serpentine belt wear Lay the wear gauge in belt... Also be caused by a defective tensioner detailed estimate for a few seconds before checking what manufacturer.

how to stretch a serpentine belt

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