loose alternator belt sound

So you may notice that the lights inside the car, and the headlights, go dim when you start your car or whenever there's an extra load on your battery. I have tried every tension from too tight to too loose to make sure its not the belt. This is often mistaken for catalytic converter failure. The Wheels. Now you know, from listening to our show that that is the unmistakable sound of a loose, noisy belt. Ok, its really cold outside, and when I start the car, it makes a high-pitch squeaky whine. I just replaced the tensioner but unfortunately the noise is still present. Along with other issues that can be exacerbated by cold weather, the serpentine belt can be directly affected. Timing belt loose, need advice You could also remove the belt and spin all the pulleys to make sure they are moving freely and not making noise. We tried to identify where it was coming from last night, but were a bit confused. BAD BAD!! Belts are used to rotate components in the engine assembly, such as a coolant (water) pump. Personally, it would drive me nuts. Turn the vehicle on and apply the r belt dressing onto the affected area while the engine is running. This can happen for a number of reasons, so it is best to check all the connections to see if anything seems amiss. noise What does a loose alternator belt sound like? By: Sean Tips on Tightening an Alternator Belt A belt can look perfectly fine, but make noise if it is old. Other common reasons may be a damaged pulley (shreds the belt) or damaged/loose tensioner (belt is loose and falls of). The serpentine belt is given the right amount of tension by the drive belt tensioner, which is basically a mechanism that is a pulley connected to the adjustable pivot. Step 3 - Apply the Belt Dressing. That’s what makes the squealing sound you’re hearing. One of the most common symptoms of a loose or damaged alternator belt is a rattling noise under the hood of the car while the engine is running. Because you get sound with the A/C, I am betting the other belts have good tension on them. 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. If it can be depressed more, then the belt needs to be tightened and/or replaced. Knocking noise- can occur when a broken belt flap around the engine and comes into contact with other parts. Failing Water Pump bearing. Also, a loose belt moves around as the engine runs. AC is off due to winter but the heat is ON. Other things in addition to the above you can try include removing the power steering/alternator belt and see if the noise is still there (don't drive it, just rev the engine a little while parked). The sound can increase the engine reaches higher RPMs. A whining noise while accelerating it can causes by several things, including low levels of steering fluid, the steering pump, a leak in the pump, the alternator, wheel bearings, loose or worn belts, the transmission, and the exhaust. If it is a rattling sound the starter may be loose, the starter bendix gear might be damaged. Flickering/Dimming LightsIf you are driving your vehicle and suddenly notice the headlights flickering or dimming or cabin lights inside the…Vehicle StallsIf your alternator belt gets too loose as you’re driving, it may cause your engine to stall. This means that you’re…Battery Warning LightOne of the first symptoms that you should notice is the battery warning light coming on. This warning light does not… It isn't a loud squeal, such as with a loose belt, it's more of a light squealing/grinding sort of sound. ditto the curved adjustment bracket bolt that goes to the engine. The tensioner and the belt might need to be replaced. Causes of a Bad Alternator. We took the drive belts off and the sound was still there. Step 1: Inspect the Alternator Belt for Damage. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. It can be tough to diagnose if belt squealing on a serpentine belt is from poor belt tension or a bad pulley or worn water pump. Could it be the 4.99 Valu Craft belt I put on it? The solution is to replace a serpentine belt and a belt tensioner. A loose alternator belt may be the culprit. If the serpentine belt is loose, it often results in various noises coming from your engine. With a loose belt, it doesn’t sit right up against any pullies that are rotating it so noise may occur from the friction. Step 4 - Apply the Soap Step 2: turn on your engine, while it’s squealing, spray it with WD40 or water and see if the noise will stop. The bearings on which the alternator rotates can also be at fault and hinder the alternator from providing an optimal performance. Unfortunately, the battery will die within minutes because it doesn't have enough power to sustain all the vehicle's energy needs by itself. 2. the top one is in a slot, and it pivots about the lower bolt to adjust the tension. The battery-shaped charging system warning light might also come on because the alternator will stop charging the battery. I drove the car 1200 miles from Ohio to Colorado, and cant hear the sound on the hi way, but at slow speeds driving around town you can. The symptoms of a loose belt include serpentine belt noise when the engine is started or when you turn the steering wheel all the way to the left or the right. Spin the alternator and check for rumbling or restricted spinning. 2. You may hear the alternator belt squeal if the pulley seized, for instance. The noise is very noticeable upon start up, but gets quieter after the car has been running a while. It is a 320801z serial 01z02392. So I know its not the pulley or alternator being bad. A loose drive belt tends to make a noise, squeak a little, or squeak loudly. If you have an automatic belt tensioner, check that for proper operation as well. (tapping/flopping sound). when the compressor has to go from zero rpms to 1,300 or more, it puts more stress on the belt and it will make noises if it gets loose. tightened tension as far as i can do these belts strtch out somehow . Answer (1 of 6): Belt’s squealing is a problem as old as since the invention of automobile more than a hundred years ago. A good way to tell if it's the alternator pulley specifically is to listen for whether or not your automobile wails even before you touch the steering wheel. You may also check which belt is the problem by applying a few drops of water on the suspected belt. If the belt or pulley immediately goes silent,... Ok, its really cold outside, and when I start the car, it makes a high-pitch squeaky whine. How to … In this way, the belt keeps your fan, air conditioning, power steering pump, water pump and alternator working. If I dont have it that high, the belt makes a ton of noise. Some cracks might happen pretty fast even if the belt is not completely worn out, but it is definitely time to replace it if it is full of cracks. This noise could manifest as a high pitch or whirring noise. Technician A says to disconnect the battery with the engine running to test for proper alternator output. Isnt the alternator not supposed to be that high up? This is especially the case when starting the engine first thing in the morning. A loose accessory belt can be really dangerous—it may not only cause your car to lose power but also damage other components like the alternator or air conditioning compressor, which could cost you big bucks. The most obvious sign of a loose drive belt, though, is in its appearance and tension. The diodes of the alternator can go bad, failing to transmit the required voltage. Jeep Wrangler JLU and JK models that produce a high pitched noise can be attributed to any of the following components: Electronic Throttle Body. A strong squeaky sound will … If I dont have it that high, the belt makes a ton of noise. I Lost power steering + engine bay noise started after 2nd gear romp. One of the most common problems of a faulty alternator is a loosened belt. Step 4 - Apply the Soap If you happen to hear a squealing noise from under the hood, it might be a case of a loose alternator belt, which needs to be tightened. VW alternator pulley noise: A properly functioning overrunning alternator pulley results in a smooth and quick running accessory belt system. Then we took the timing belt covers(top and bottom) off and the noise is still there. Observe and listen to the engine's sound, and if the noise persists despite the lubricant, continue to the next step. Loud Noise Under Hood may be Loose Alternator Pulley Bolt. The sound is basically like a squealing belt. Answer (1 of 3): 1. Grande Punto 1.3 Multijet 90. One other thing that might lead to an alternator belt noise is when there are loose pulleys on either side of the engine. Your solutions might not be effective if the belt is too loose. robert mckinney in New Providence, NJ on . An loose alternator drive belt may cause a growling noise in the engine area at low speeds (usually when accelerating from a stop). The sound seems to correlate to some vibration that I could see in the serpentine belt when looking down toward the bottom of the car (from the top). You will hear a screeching noise if this occurs, or the alternator belt will occasionally come loose. The alternator charges your battery. How To Check Bearings. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. Squeaking or Grinding Noise. Classified ads, photos, shows, links, forums, and technical information for the Volkswagen automobile You can often see this directly by inspecting the belt. The most noticeable symptom of a bad serpentine belt is that cracks start to occur on the belt. It sounds like the alternator belt being too loose. Every 7 days or so this starts happening, so I tighten the alternator belt, at which point the steering is smooth and the noise is gone. If you’re sure that the squealing sound is due to a loose accessory belt, then you may want to take some time to tighten it yourself. The weird thing is that it goes on and off in about 30 second intervals. A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. I run a boat apx 36 hours a week. If it is squealing, it is the serpentine belt. If the noise is from the power steering belt (it can be a V-belt or a serpentine belt), then it is either that the belt is cracked, glazed, or loose. Failing Belt Pulleys – The belt is pulled along by several pulleys. #1. Tension chart is below. Jan 22, 2013. 3.2 Si6 alternator drive pulley loose - warning for i6 owner Wife called me 5 minutes after she left the house "car just made a loud whizzing / whirring noise" no warnings on the dash and after she pulled over the sound had disappeared. A loose or worn-out alternator belt will cause some disgusting noises. The solution is to replace a serpentine belt and a belt tensioner. An overworking alternator can also produce a whining sound. I'd be looking at the alternator, battery and the alternator belt first. A slipping alternator belt will cause the problem to persist before the lights go out completely. Battery issues are some of the most common loose alternator belt symptoms since a slipping belt means curtailed or no power to the battery. Worn-out alternator belts need to be replaced and the new piece fixed right to eliminate the loud grinding noise. Squealing sounds. Before I drop a few hundred dollars at the dealership this morning on a new alternator, I wanted to double-check my problem isn't caused by a bad or loose serpentine belt. I am thinking that something could be loose at the bottom mount which allows the alternator to wiggle along the armature axis, which might look or sound like a loose belt, but this is throwing darts in the dark. A bolt is sliding around near the belt causing rattling noise.. Is the belt a 1 piece serpentine? Whoever diagnose for … Also Read: How to Soundproof a Car/ Reduce Road/Wind Noise Bad Alternator Whining Noise; A bad alternator whining noise is the most common and it’s a very high-pitched, annoying sound that will continue while the engine is running. One of the first symptoms that you should notice is the battery warning light coming on. I even loosened the belt so loose that im worried it could fly off. An alternator belt is known by many names including the drive belt, fan belt, v-belt or a serpentine belt. A belt can look perfectly fine, but make noise if it is old. The alternator works by rotating, this rotation is made possible by the belt attached to the engine's crank pulley. So I raise the alternator all the way to the top. So I know its not the pulley or alternator being bad. However, the most obvious sign of a loose drive belt is its appearance and tension. If we loose it one day in the middle of the ocean all belts have to be removed to re install broken alternator belt. If you happen to hear a squealing noise from under the hood, it might be a case of a loose alternator belt, which needs to be tightened. With the motor OFF press down on the top of the belt. The pulley bearings should be ruled out first because loose bearings can also cause such a noise. One of the most common symptoms of a failing belt tensioner is unusual noise coming from either the tensioner or the drive belts. It's most likely to be the alternator belt or the belt that goes around the alternator (and maybe other things as well) because the alternator is now being asked to recharge the battery. Symptoms also include overheating, burnt belt smell, and excess belt wear. Sometimes, an improperly mounted alternator can produce noises (and battery connection problems) that can lead to failure. There was no such sound prior to belt change. Answer. Leaking Vacuum lines. Blinking headlights or dimming cabin lights when the car is running indicate … Its really annoying after awhile. What does a loose drive belt sound like? A broken belt could flap around the engine compartment and make a knocking noise as it comes in contact with other parts. One of the most recognizable signs of a loose alternator belt is the high-pitched squealing sound that accompanies it. So I raise the alternator all the way to the top. The idlers may be worn, their bearings may be dry- they make a chirping sound at slower speeds when they are dried out. Loose Alternator Bolt. (1991 Toyota Camry) a/c,alternator belt very loose. Slipping Belts. The battery-shaped charging system warning light might also come on because the alternator will stop charging the battery. A worn belt can, therefore, begin to slip, which is one of the causes the squeal. Made of rubber, the belt is prone to deterioration over time, and due to its position next to the engine, excessive heat and general wear will lead to a brittle drive belt that is prone to cracking. Loud Noise Under Hood may be Loose Alternator Pulley Bolt. Whereas when the overrunning alternator pulley fails it starts to make lots of flapping and chattering accessory belt noise that comes from the front side of the engine when the engine is running. Symptoms of a broken serpentine belt include loud slapping, squealing or knocking noises coming from under the hood. An alternator overworks when the voltage regulator instructs the alternator to produce more voltage than is required. A strong squeaky sound will … 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. It sounds like the alternator belt being too loose. Jump to Latest Follow If the alternator belt is a little bit loose, it can charge the car battery but not … A very tight belt would put pressure on and damage the parts in the assembly, whereas a loose belt would not allow the parts to run firmly. Other Alternator Noises. If it is then try removing the a/c belt too and see if … If the drive belt noise resembles a squeal or a squeak, it is possible that the belt tensioner is loose. The more you accelerate, the louder the alternator whine will be. I have just fitted a new water pump, tensioner and alternator along with a new accessory belt to solve a noise which was being caused by a seized clutch on the old alternator pulley. The magic word is "constant". I am thinking that something could be loose at the bottom mount which allows the alternator to wiggle along the armature axis, which might look or sound like a loose belt, but this is throwing darts in the dark.
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