Serpentine Belt Tension How Tight

Toyota Camry 2002-2006: How to Replace Serpentine Belt, Idler and Tensioner Pulley. it has 2 belts: serpentine and air conditioning (AC). A belt tensioner is a normal wear item and should be inspected regularly. If I remove the bolt from the tensioner, nothing seems to happen, if I tighten it nothing happens. I'd recommend getting a Gates Krikit-II gauge off Amazon (~$20) to check belt tension. - Super Chevy Magazine. The tensioner normally keeps a relatively constant tension on the belt over a given length range, losing that gives you much less control over tension, especially in a straight belt setup. The long bar included in this set did the trick. This quick video will show you how to change a loose serpentine belt tensioner in your Ford F150, F250, or F350 pickup truck (1992-1996). If a belt starts slipping, the tensioner should always be checked to see if it is functioning properly. OTC 4748 Belt Tension Gauge Tool Review -EricTheCarGuy - Duration: 9:39. How to Tighten a Drive Belt. Most serpentine belts have an auto-tensioner that automatically keeps the proper tension on the belt. Now I wonder how to >adjust the tension and how tight to make it. Sometimes a new belt is not needed. by Jeff Lucius. Place the wrench or a removal tool with enough room to wiggle on the tensioner before releasing it. NOTE: if you are having issues with the serpentine belt “walking” off the A/C pulley or any of the other accessories there’s a very good chance your tensioner is buggered. By using a spring-loaded tensioner, belt and accessory life can be drastically longer than when using a V-belt system. If the belt is loose the tensioner may be stuck or broke. It's also a good idea to replace all the idler pulleys. It almost seemed as if the A/C tensioner damper is stuck in the extended position. Comments: I was able to easily remove the serpentine belt on my 1997 e36, but got almost zero movement on the A/C belt tensioner when trying to release the tensioner using an 8mm allen wrench. Attach the tool using the 14mm socket to the center bolt on the tensioner (yes, it is really tight in there). You will need a wrench or two to release the tension on the belt. My question: I'm guessing it's either the Tensioner Pulley or the Idler Pulley, or both making the noise. The belt and tensioner are maintenance items and don't last forever. Double check that the ribbed pulleys face the ribbed side of the new belt and are properly aligned. On the way back from the shop the PS belt started screeching loudly. Over time, the spring that maintains belt tension can weaken. Here is how I check belt tension on a serpentine belt: Go to the long side of the belt and grab the belt with your hand. I took it back to the shop to have it checked. The belt will be the first thing to come off and the last thing to go back on, so find the routing layout of your vehicle’s serpentine belt. Now replace the old belt with the new one and tighten the tension on the belt again. This is also the most common these days. IIRC, disconnect the top attachment of the shock, pop the front cover off the tensioning pulley, remove the tensioning pulley (6mm or 8mm hex), position the fan so you can get a 12mm hex on the tensioner bolt. Read on to learn how to replace it. >It has that serpentine belt and I changed the water pump so I had to >unbolt the tensioner to get it out of my way. The main serpentine belt drives the water pump, power steering pump, and alternator. The tensioner cannot be adjusted. When an engine cylinder fires, we apply force to the serpentine belt and tensioner. So the best I can figure, you can measure the tension by how far the belt will "push in" in the middle. The pump mounts to a bracket that has machined slides, allowing it to move. I need to replace the serpentine belt on my 2011 Versa and I just need to be sure that I identify the belt tensioner correctly. My opinion only, but as I see it a major issue with most of the dampeners I looked at was the small roller. If the belt is not seated properly even on one pulley it will be difficult to slide the belt over the tensioner. Put on a new Gates K060827 serpentine belt. Spring tensioners are designed to tension automatically. IIRC, i had to fish the new belt in from a combination of the top and bottom. In the attached photo, is the belt tensioner the pulley above the crankshaft pulley that has the 3 bolts? Thanks in advance. Discuss 300M 3. Jeep Grand Cherokee 1993-1998: How to Replace Serpentine Belt The serpentine belt uses the engine rotation to turn the power steering, alternator, and air conditioning. I have a 2000 Chevy blazer 4wd I have replaced the alternator air conditioner compressor water pump serpentine belt idler and tension pulley and I still have that noise when I start my vehicle in the morning its consistent when I drive off the noise is again consistant'after the car is warmed up and its idling the noise stops but one I. There is usually a belt tensioner or idler pulley to guide the belt as it moves. My car (2000 Boxster S, 42,000 miles, 6-speed manual) has developed a chirp, or squeak, at startup, idle, and low RPM. How do I tighten the serpentine belt - Hiw do I tighten the serpentine belt I replaced the tensioner system but it can't get the belt to tighten up × We use cookies to help our site to work, to help us understand how it is used, and to tailor advertising on this and other sites. There is also a note that says the bolt that holds the pulley on the tensioner in place is a left hand thread, you torque to the right to remove the bolt. do NOT contact me with unsolicited services or offers. chrysler forum at Car Dealer Forums; I'd like to replace the serpentine belt on my 2000 300M. The last hash is the tighest position and if you are already at this mark, you need a new belt. Fits idler pulleys requiring 15mm, 16mm, 18mm hex or 3/8" or 1/2" square drive. The symptoms of a loose serpentine belt include a loud squealing noise when the engine is started or when the steering is turned all the way to one side. Or use a socket on the hex-shaped protruding nut. Re: Replacing the drive belt - how to Procedure continued - 4. 2000 Chrysler Town & Country Generation III Mini-Van Repairs. Place the socket end of the socket wrench over the wing-nut and turn clockwise Step 3. With tension removed, there should be plenty of room to get the belt onto the last pulley. The main serpentine belt drives the water pump, power steering pump, and alternator. To install the new one, thread the belt around the correct pulleys, release the tension and slip the belt over the tensioner pulley. Due to hundreds of heat cycles and wear on the rubber belt as well as bearings in the pulleys, the annoying noises you hear arise. Attach the tool using the 14mm socket to the center bolt on the tensioner (yes, it is really tight in there). How to Replace a Serpentine Belt. Or use a socket on the hex-shaped protruding nut. If your belt looks to be in good shape and isn't dried out, then it's a good idea to check the tension on the idler pulley to make sure it's strong enough to take all the slack out of the belt as it spins. This article will educate you on how to replace alternator belt. The most common cause for this would be from the Serpentine Belt. The Steps To loosen an AI tensioner, such as an alternator, loosen the main mounting bolt, usually on the engine, and the locking bolt, usually on a bracket or arm. The tension in the serpentine belt keeps it tight and straight on the connecting pulleys and prevents it from flipping over. Disconnect battery 3. This requires a special tool. Problems with the belts and pulleys usually identify theirselves with a squeeling noise of a slipping belt, a high pitched whine of a bad pulley bearing or the smell of burning rubber. The timing belt tensioner is what applies pressure to the timing belt, keeping it tight and running smoothly. My serpentine belt fell off and I lost all power steering as well as my alternator. If the alternator belt moves more than a half an inch, it is too loose, adjust the alternator belt to proper tension before proceeding to next step. If you can see this diagram, you can see that serpentine belt part # 3817287 (now listed as no longer in production) has been superseded by part # 3889124 (what I have in my hand). 7 Start the Mitsubishi Lancer's engine to test the alternator belt and make sure it is working properly. The “wrap” of the serpentine belt is much tighter than a V-belt-driven accessory. Once the new belt is on, verify that it is seated correctly on all 3 pulleys. Mine's a 69inch belt, converted to mm is 1752. Take out a spanner or socket wrench set and locate the tensioner pulley. Don't neglect the general inspection of your car during routine maintenance. The belt turns all the accessories on the engine including the water pump and alternator. In the attached photo, is the belt tensioner the pulley above the crankshaft pulley that has the 3 bolts? Thanks in advance. Draw yourself a diagram of the way your belt loops around the pulleys. Most tensioners have a place where you can place a socket to release tension while putting on the belt but I can't seem to find it. OTC 4748 Belt Tension Gauge Tool Review -EricTheCarGuy - Duration: 9:39. The rubber bellows on the tensioner had become torn and water got into the cylinder and damaged it. Recently after replacing the serpentine belt in my 1992 MB 300TE 4matic, the bearings on the air pump failed. Using a 3/8” drive ratchet and extension in the square on the tensioner pulley. • Squealing noise under the hood: This may signal that the belt is slipping. I purchased a 1999 Chrysler Town & Country (similar to the Dodge Grand Caravan and Plymouth Grand Voyager); while I appreciated its improvements over my 1997 minivan (HomeLink remote, tiltable A/C vent, thicker valve cover gasket, radio volume switch in the steering wheel. How do I get the serpentine belt back on. This movement occurs in the pivot area of the tensioner. As you loosen it, the tension in the belt is going to be releaved, so dont be surprised when it moves. Top 5 Symptoms of a Bad Serpentine Belt A bad serpentine belt is not something you can just put off and wait to deal with. Before you start the car double-check the serpentine belt is installed properly. Reduced slip can allow the use of lower-ratio pulleys; this reduces the load on the engine,. When an engine cylinder fires, we apply force to the serpentine belt and tensioner. Turn the belt-tensioner pulley counterclockwise again and slide the serpentine belt around the tensioner pulley. Either of the positions does not work for the vehicle. loosen belt tensioner I have an '03 Odyssey. If the tension is too low, the belt will wobble and won't have enough friction to drive the pulleys it's running on. With a serpentine belt system, the belt is kept taut with a single spring-loaded tensioner. You will need to replace it in case of any damage, or extremely tight or. Belt flutter or belt noise when revving the engine are indications of a weak tensioner. Spring tensioners are designed to tension automatically. When I changed by belt, I went to the local auto parts store and picked up a Dayco belt. Thirdly, the tensioner pulley is core to the reduction of the need to manually re-tension the serpentine belts periodically. Tighten Upper 12mm Bolt: Tighten Lower 14mm Bolt: Once you are satisfied with the tension on the new belt, you can tighten the other 12mm bolt and the lower 14mm bolt. After tightening the belt to the desired tension, be sure to tighten all 4 of the mounting points. I am located in Renton 5 minutes off Sunset Need done tonight after 7 or first thing in Morning. According to the 93 Shop Manual, the belt tensioner is removed by removing a bolt and two nuts and simply removing the tensioner. 25 pitch bolt into the threaded hole in the top of the tensioner unit (as indicated by the yellow arrow in the picture below) and turn using a 13mm socket or wrench until the serpentine belt is loose. Before you start the car double-check the serpentine belt is installed properly. Hey -- I just bought a new belt tensioner that I'm going to install so I can re-install my serpentine belt, which I had to remove to replace my power steering pump. If the belt is not seated properly even on one pulley it will be difficult to slide the belt over the tensioner. If a belt starts slipping, the tensioner should always be checked to see if it is functioning properly. Loosen the nut and bolt, after which you will have to set the alternator against the belt. An auto parts store should have a diagram,or there should be a picture on the underside of hood. Tighten Upper 12mm Bolt: Tighten Lower 14mm Bolt: Once you are satisfied with the tension on the new belt, you can tighten the other 12mm bolt and the lower 14mm bolt. You should also check the tensioner pulley at this time for possible wear. and theres no "tightening" itit has a tensioner that keeps it tight. A serpentine belt that keeps slipping off the pulley is another symptom of a bad tensioner. And with a spring-loaded tensioner, you can remove. The tiny Honda timing belt tensioner spring pictured in this section is more of a reference than a tensioner, making it an NAI mechanical tensioner, adjusted by hex key and torqued. The Belt should have about 2 - 3 cm movement which allows you to hook it over the alternator pulley and then release the tensioner. This part of the engine ensures that the valves operate in the correct timing system. Remove fan shroud and fan 2. Find out how to do it yourself. The solution is to replace a serpentine belt and a belt tensioner. If a belt starts slipping, the tensioner should always be checked to see if it is functioning properly. On the belt tensioner, there should be some reference marks thinking 3 and a triangular pointer, indicating if the belt is to tight, just right, or at its wear max point. 25 pitch bolt into the threaded hole in the top of the tensioner unit (as indicated by the yellow arrow in the picture below) and turn using a 13mm socket or wrench until the serpentine belt is loose. 7 is anything like mine, the "idler" pulley will be the easiest to adjust the tension with. The belt needs to be fairly snug to avoid squealing. The belt tension should be absolutely right. It could last a long time, or components such as the internal spring or pulley bearings can go bad at any time. Including Repairs for Plymouth and Dodge Generation 3 Mini-Vans. Had to replace the serpentine drive belt tensioner at 140,000 miles and used the following procedure. Place the wrench or a removal tool with enough room to wiggle on the tensioner before releasing it. With the help of a steel bar, tighten the adjusting bolt as you hold the tension. Can I tighten my serpentine belt with the alternator? No. It is rhythmic and varies with engine speed. Helps release the tension on spring loaded pulley tensioners in tight locations. That’s why regular inspections are so important. The serpentine belt on your R53 MCS is a critical component in the engine. It turned out the nut that holds the serpentine belt's tensioner sheared off from the motor. Tensioner location, and it's removed:. The belt is kept tight through the belt tensioner. Place the wrench or a removal tool with enough room to wiggle on the tensioner before releasing it. 2002 Pontiac Grand Prix serpentine belt. How to Tighten the Serpentine Belt of a Maxima. I have read through several threads/posts on a handful of subaru/legacy forums, and it seems that the belt tensioner is almost always the problem. Next, slide the serpentine belt over the tensioner pulley. the harder you push the more the tensioner moves, obviously!. If the belt fails and breaks, you can't go anywhere because you'll lose your alternator. The belt will be the first thing to come off and the last thing to go back on, so find the routing layout of your vehicle's serpentine belt. Buy Gates 91132 Belt Tension Tester: Way way way too tight. Most tensioners feature an internal spring and pulley, which applies needed force against the serpentine belt to keep it tight. Let us know if you would like us to add anything to our list. Look at the tensioner and you should see some hash marks. generally replace the belt or tensioner if thats where the noise is coming from. When something goes wrong, it is often the tensioner that’s the cause and not the timing belt itself. The most common cause for this would be from the Serpentine Belt. The belt that transfers this energy must be held in place with a belt tensioner, a moveable device with an idler pulley that pushes the belt into place, holding it taut so that it does not fly off the engine. Tension is maintained on the 4. My car (2000 Boxster S, 42,000 miles, 6-speed manual) has developed a chirp, or squeak, at startup, idle, and low RPM. The pulley was bouncing when the engine was idling, causing the drive belt to chirp. Place the belt on the tensioner pulley and then slowly release the tensioner pulley back to it tensioned position. The timing belt tensioner is what applies pressure to the timing belt, keeping it tight and running smoothly. With the help of a steel bar, tighten the adjusting bolt as you hold the tension. when i'm pushing down the tensioner also moves a little bit. When something goes wrong, it is often the tensioner that’s the cause and not the timing belt itself. Hi all, I am replacing the serpentine/alternator belt on my 2003 V6. If I put some pressure on the tensioner the noise goes away. I followed the instructions on the. Release the self-adjusting tensioner from the belt with caution. Serpentine belt replacement is specified every 60k miles for the 9-5. Find out more about your Timing Belt Tensioner from Pegoraro Auto Repair in Vancouver, WA. Sorry to hear this man the AC belt is positioned behind the serpentine belt so if the AC belt comes off it will inevitably take the serpentine belt off of the tensioner. A bit about your vehicle's serpentine belt Your serpentine belt is a long belt that’s driven by your engine. Cheap plastic cap, >it does not unscrew by hand. It will not go on the last pulley even with the tensioner all the way out. If you look at an automotive style serpentine belt tensioner, you will see a much larger roller. Serpentine belt I was changing my oil yesterday (easy task on this car, but the car being so low to the ground made for tight quarters) and was thinking How does one go about replacing the serpentine belt?. To install the new belt, you must rotate the tensioner, install the belt, and then slowly release the tensioner. To tighten the belt, use a strong piece of wood to pull the generator away from the engine - a hammer handle will do - while you test the belt tension with the other hand. Hiring a mechanic to replace a serpentine belt typically costs about $60-$200 or more. Belt flutter or belt noise when revving the engine are indications of a weak tensioner. Route the belt around all the pulleys, ensuring that the serpentine belt is centered on the pulley. So much so, i occasionally have a "chatter" at idle that I've concluded is the serpentine belt tensioner striking its stop. A tensioner maintains the correct amount of tension on the belt at all times throughout its duty cycle. I hope your block is not damaged but if one of the AC bolts is sheared off the only way for them to get it is to drill it out. I have the proper diagram it is just too tight to get back on. Perhaps they had another shop change the motor mount two weeks ago, and the tech didn't remember to tighten the tension bolt enough, causing the belt to be too loose. Just an update, they did change out the belt tensioner pulley and the rattle noise is gone. RE: Serpentine Belt Tensioner IP: Logged Message: anyone know just how much play in the belt is normal? my belt is only 4-5 months old but it seems i can push down on the belt and get about 1/2 inch to 3/4 inch push. A drive belt tensioner is a pulley mounted on a spring mechanism or adjustable pivot point that is used to keep tension on the engine belts. The belt tensioner holds the serpentine belt under tension; allowing it to grip the pulleys firmly enough to transmit the engine's rotating force to the accessories. Loosen the 2 bolts and the pulley should slide enough to get the belt off. 7 magnum hemi. If the tension drops below the used belt tension, then the belt should be re-tensioned according to the RETENSION amount. Once the belt has been run through all the necessary pulleys, either release the tensioner or use a piece of wood to pry the alternator away from the motor to increase the tension in the belt. Let's replace your idler pulley and tensioner to set things right under the hood of your Silverado. This happened on my ’96 9000. I'm afraid a wrench will break it,. also make sure you have the sticker. The tensioner is what keeps the belt tight around all the pulleys. Now you need to tighten the slider bolt and the tensioner lock bolt. It will be a little tight getting the belt out between the crank and the tensioner and you might need to give a little pressure on the tensioner again with the ratchet to get it to come out. Now, route in the new tensioner up through the front passenger wheel well and set it into place. Once you release the tension, begin removing the serpentine belt. 2000 Chrysler Town & Country Generation III Mini-Van Repairs. Had to replace the serpentine drive belt tensioner at 140,000 miles and used the following procedure. The tensioner pulley on the new auto-tensioner had less play, but I figured that replacing the entire assembly is a good idea since: 1) there was noise at cold start-up with the old belt, 2) a history of tensioner pulley failures on this engine family, 3) previous complaint about a rattle noise when the A/C compressor is engaged (could not. If the belt has been exposed to anti-freeze, it is safe to drive but the noise will not go away permanently unless you replace it. I wasn't comfortable letting the compressor hang (fear of leaks later), plus my big mitts aren't very good in tight places. Put the box end of the 15mm wrench on the pulley bolt and push toward the passenger seat. If the alternator belt moves more than a half an inch, it is too loose, adjust the alternator belt to proper tension before proceeding to next step. Hi all, I am replacing the serpentine/alternator belt on my 2003 V6. Trying to force it will probably break the pulley bolt. Re: Replacing the drive belt - how to Procedure continued - 4. Show Full Signature. Lift the alternator slightly to let you thread the 3/8-24 bolt through the tensioner’s lower ear and into the belt tensioner block. Belt tensioners keep a constant pressure on the belt, when they wear they will allow the belt to roll off the tensioner causing belt failure. It would still adjust, just hardly enough to replace/tighten the belt. If the belt is shown to be worn, either caused by. Full Service Auto Repair & Tire Service Center. Tensioner location, and it's removed:. Place the serpentine belt back on the pulleys and then use a socket wrench on the bolt on the front of the tension pulley. Spring tensioners are designed to tension automatically. A loose belt that's slipping will squeal. Here are the belt and hose types in your car, along with their applications. The serpentine belt on your R53 MCS is a critical component in the engine. Any special tools required. Its getting better since I replaced the water pump a second time (but an a1 cardone), but I'm reluctant to buy another gates pump. From underneath the car hand tighten the bottom tensioner bolt; From up top, thread in the top tensioner bolt. 5" Serpentine Belt Kit #40725 (with Power Steering) Use 81. Most tensioners have a place where you can place a socket to release tension while putting on the belt but I can't seem to find it. Fits into tight areas. • Wear and tear: If a visual inspection of the serpentine belt reveals significant wear and tear, including cracks, separation, or damage, it's time for a new belt. And it also uses an internal pre-set spring. when i'm pushing down the tensioner also moves a little bit. If the belt was too tight, the pump will move inwards towards the engine as the bolts are slackened. Let's replace your idler pulley and tensioner to set things right under the hood of your Silverado. This takes tension off the belt and you can slide it off the tensioner pulley. but sounds like the belt. With the belt off, visually inspect the tensioner for any cracks or signs of metal-to-metal contact between the tensioner arm. See below for the before and after shots in my Yaris:. In essence, there used to be a different and much thinner belt for each component such as the alternator, water pump, air pump and power steering pump. To tighten the belt, use a strong piece of wood to pull the generator away from the engine - a hammer handle will do - while you test the belt tension with the other hand. The belt itself is a little loose, i can easily pull on it and twist it almost a full turn. Once the adjustment bolt is tight, check the belt tension again. OTC 4748 Belt Tension Gauge Tool Review -EricTheCarGuy Replace an Alternator Belt/Serpentine Belt. The rest of the bolt is still on the engine and loose. Performance Tool W84010 Belt Tensioner Serpentine Belt Tool Releases tension on Serpentine Belts with spring loaded idler pulleys. Remove alternator ( note 2 screws hold wire harness clamp on outside of alternator) 5. My question: I'm guessing it's either the Tensioner Pulley or the Idler Pulley, or both making the noise. The new belt seems pretty tight, with no slack. I have a 2000 Chevy blazer 4wd I have replaced the alternator air conditioner compressor water pump serpentine belt idler and tension pulley and I still have that noise when I start my vehicle in the morning its consistent when I drive off the noise is again consistant'after the car is warmed up and its idling the noise stops but one I. Or should I just buy a new tensioner with a hope that I dont need to adjust tension since it should have some standard tension. Tensioner pulleys have spring coils inside them that apply the correct amount of pressure and force that is necessary to keep the belt tight. The largest 4Runner community in the world. Higher tension reduces slip, which increases belt life and mechanical efficiency. I am replacing the serpentine belt tensioner pulley in my 120 k miles 1995 Z28 Camaro (5. To re-install a belt tensioner for a 1987 Ford Taurus, tighten the bolt when the tensioner pulley is holding the serpentine belt tight. From underneath the car hand tighten the bottom tensioner bolt; From up top, thread in the top tensioner bolt. We are a tight knit community of like minded enthusiasts who value "on topic", clean discussion. My tensioner was making a chatter noise on my 2013 Tacoma. Disconnect air condenser (4 bolts two top two bottom hold in place with wire and. If the electrical load is constant, the tension in the belt reduces as the revs increase, which is why it. Tuffy Tire & Auto Service Center Tampa, Florida 33612. I have a 2000 Chevy blazer 4wd I have replaced the alternator air conditioner compressor water pump serpentine belt idler and tension pulley and I still have that noise when I start my vehicle in the morning its consistent when I drive off the noise is again consistant'after the car is warmed up and its idling the noise stops but one I. The serpentine belt can be found in the front of the engine and behind the fan shroud. Photos are of a 2006 model year with a GD16DE motor but many models. A belt tensioner is a normal wear item and should be inspected regularly. Now you need to tighten the slider bolt and the tensioner lock bolt. Ratcheting Serpentine Belt Wrench - 8586 Features: Fits tensioners requiring 15mm, 16mm (5/8") hex, and 3/8" square drive sizes. Tensioner pulleys have spring coils inside them that apply the correct amount of pressure and force that is necessary to keep the belt tight. Noticed an occasional rattle from the engine area, appears it might be the serpentine belt tensioner. Once you release the tension, begin removing the serpentine belt. trust me, with only you doing the job, you will not be able to over tighten the belt tension. To tighten the belt, use a strong piece of wood to pull the generator away from the engine - a hammer handle will do - while you test the belt tension with the other hand. Place the serpentine belt back on the pulleys and then use a socket wrench on the bolt on the front of the tension pulley. Car details. Serpentine belt I was changing my oil yesterday (easy task on this car, but the car being so low to the ground made for tight quarters) and was thinking How does one go about replacing the serpentine belt?. This reduces the maintenance tasks needed for your car. When I put it on I had to compress the tensioner completely to it's limit and force the belt over the water pump pulley, it was very tight. The drive belt, or serpentine belt as it is often called, transfers power from the crank pulley to each of the accessories in your engine. Top 5 Symptoms of a Bad Serpentine Belt A bad serpentine belt is not something you can just put off and wait to deal with. The Belt should have about 2 - 3 cm movement which allows you to hook it over the alternator pulley and then release the tensioner. The diagrams are for both,with and without AC models. The serpentine belt is in charge of turning all your pulleys in the Audi A3. Lift the alternator slightly to let you thread the 3/8-24 bolt through the tensioner’s lower ear and into the belt tensioner block. ? no you not tighten a serpentine belt. The tensioner pulley is just a plain pulley not attached to any thing. The belt will be the first thing to come off and the last thing to go back on, so find the routing layout of your vehicle’s serpentine belt. serpentine belt tensioner exploded view. Remove alternator ( note 2 screws hold wire harness clamp on outside of alternator) 5. 5 serpentine belt replacement in the rec. This is called a belt tensioner. Be sure the belt is tracked appropriately. By using a spring-loaded tensioner, belt and accessory life can be drastically longer than when using a V-belt system. The tensioner setup is designed to allow a certain amount of flex to account for stretching as well as vibration. Better still: Most of the serpentine-belt installations use a spring-loaded tensioner pulley that keeps a constant preload on the belt, eliminating the need to adjust the tension. A cold belt pre-stretch will slip if there's nothing there to take up the increase as it heats, the length increase due to heat might be too much. This article applies to the Audi A3 (1996-2008). And with a spring-loaded tensioner, you can remove. Over time, the spring that maintains belt tension can weaken. There is usually a belt tensioner or idler pulley to guide the belt as it moves. You even need to check the tension in the belt while tightening it. The tensioner once loose angles towards the front of the vehicle in such extreme position that the tensioner tools didn´t gave a sufficient angle to put the belt back on! I had to remove the plastic trim that covers the radiator and move the windshield washer and Antifreeze reservoir in order to angle the rod enough so the belt will slip back. Using a serpentine belt tool to loosen the tensioner and a belt placement tool to position the belt, we completed the entire job in less than 15 minutes, without breaking a sweat (or a knuckle). It was the correct part for the Rogue but it is 3MM shorter than the Nissan OEM belt. com, your source for quality replacement parts and the best service on the Internet. How to replace the serpentine belt on a 1. Serpentine belt installing Mercedes Benz '97 C230? Mercedes C-Class Forum. Belt tensioners are extremely important in the proper operation of the accessory belt drive system. In other words this pulley has only one job, and that is to tighten the serpentine belt. Loosen the 2 bolts and the pulley should slide enough to get the belt off. Because the serpentine belt is negotiated through multiple pulleys, it is important to keep the proper tension on the belt. A tensioner maintains the correct amount of tension on the belt at all times throughout its duty cycle. The new belt seems pretty tight, with no slack. *The used belt tension is the amount of tension that would typically be maintained under normal drive conditions by the given belt size. The serpentine belt on your R53 MCS is a critical component in the engine. How to Replace Serpentine Belt Tensioner. If the belt is loose then look under the alternator. 7 Check the belt tension. Be sure the belt is tracked appropriately. Step 2 - Loosen the belt. I'm replacing the idler and deflection pulleys on my E39 540i, but when I checked it initially I couldn't figure out the correct way to tension the belt tensioner on the main serpentine belt. Timing belt replacement is a crucial part of scheduled maintenance. square drives; Includes 13mm, 14mm, and 15mm crowfoot wrench. im not familiar with the german serpentine belt tensioners,what do i need to do to loosen up the tensioner in order to get the serpentine belt off the alternator pulley,any info would be great,thanks. A failure of the serpentine belt tensioner pivot-area. Noticed an occasional rattle from the engine area, appears it might be the serpentine belt tensioner.