Depending on what part broke, it may sound like nothing. belt How To Tighten Your Boat Alternator Belt - Vessel Vanguard Loud Noise Under Hood may be Loose Alternator Pulley Bolt. Spin the alternator and check for rumbling or restricted spinning. I have tried every tension from too tight to too loose to make sure its not the belt. I would not consider the vehicle driveable at that point. alternator drive pulley loose - warning 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. 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. For a DIY task, you will simply require a socket wrench set. the top one is in a slot, and it pivots about the lower bolt to adjust the tension. Answer (1 of 3): 1. This noise could manifest as a high pitch or whirring noise. Cars are often heard making this sound, which is more common during cold weather. These could cause extra strain on the belt and squealing. 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. If it is squealing, it is the serpentine belt. Need a solution fast we are in the middle of our salmon season. Since you haven’t specified the Year, Make, Model and Engine size so my answer won’t be true to your vehicle. The idlers may be worn, their bearings may be dry- they make a chirping sound at slower speeds when they are dried out. A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Could not see anything loose or anything hitting one of the drive belts. You will hear a screeching noise if this occurs, or the alternator belt will occasionally come loose. The most obvious sign of a loose drive belt, though, is in its appearance and tension. One of the first symptoms that you should notice is the battery warning light coming on. A bad pulley can cause slippage or misalignment. The tensioner and the belt might need to be replaced. The alternator charges your battery. I even resorted to tightening and loosening the belt while the car is running - the pitch of the screech doesn't really change, without going too loose. So I know its not the pulley or alternator being bad. Worn-out alternator belts need to be replaced and the new piece fixed right to eliminate the loud grinding noise. Aug 2, 2014. Your solutions might not be effective if the belt is too loose. This warning light does not… May 21, 2010. F07 Gran Turismo (2010 - 2017) Loose Alternator Drive Belt Tensioner - 26K Miles! 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. I have appoint Mon. If it sounds like a fan, it is likely the cooling fan. Grande Punto 1.3 Multijet 90. Other common reasons may be a damaged pulley (shreds the belt) or damaged/loose tensioner (belt is loose and falls of). It sounds like the alternator belt being too loose. Your car hits the “snooze” button when you try to start it. Over time, the friction wears down these grooves, resulting in a loose fit. Observe and listen to the engine's sound, and if the noise persists despite the lubricant, continue to the next step. Or at least I THINK it's coming loose, by the skipping and jerking in my steering wheel along with the sounds of squealing and moaning. I just replaced the tensioner but unfortunately the noise is still present. Ok, its really cold outside, and when I start the car, it makes a high-pitch squeaky whine. This can happen for a number of reasons, so it is best to check all the connections to see if anything seems amiss. Other Alternator Noises. If you have an automatic belt tensioner, check that for proper operation as well. The alternator mounts via two bolts. If your fan belt breaks or falls off, these components will eventually fail, potentially leading to much bigger issues. What does a loose alternator belt sound like? This is especially the case when starting the engine first thing in the morning. The belt will first be cracked and have frayed edges before snapping. If you have an automatic belt tensioner, check that for proper operation as well. If you remove your drive belts (alternator, power steering and air conditioner belts), and then restart the vehicle, if the noise stops, then spin the pulleys you just removed the belts from, to see which one is making the noise. Classified ads, photos, shows, links, forums, and technical information for the Volkswagen automobile You may hear the alternator belt squeal if the pulley seized, for instance. 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. VW alternator pulley noise: A properly functioning overrunning alternator pulley results in a smooth and quick running accessory belt system. A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. 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. One of the most common symptoms of a failing belt tensioner is unusual noise coming from either the tensioner or the drive belts. These could cause extra strain on the belt and squealing. Observe and listen to the engine's sound, and if the noise persists despite the lubricant, continue to the next step. The solution is to replace a serpentine belt and a belt tensioner. A strong squeaky sound will … Spin the alternator and check for rumbling or restricted spinning. Loose Alternator Bolt. 23. Squeaking- a sign that an alternator is going bad. (tapping/flopping sound). 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. The diodes of the alternator can go bad, failing to transmit the required voltage. I'm suspecting that the alternator will likely need replacing, as … Jeep Wrangler JLU and JK models that produce a high pitched noise can be attributed to any of the following components: Electronic Throttle Body. Technician A says to disconnect the battery with the engine running to test for proper alternator output. Any noise that sounds like a squealing, whirling, or chirping might be a sign that the tensioner is weakening. The sound is basically like a squealing belt. You could also remove the belt and spin all the pulleys to make sure they are moving freely and not making noise. The more you accelerate, the louder the alternator whine will be. Technician B says that a loose alternator belt may cause this problem. Alternator Belt too tight/loose? Even though it is rare, a faulty spring in the tensioner may cause a back-and-forth motion. If you hear this noise and determine that the alternator bracket is loose, you should first inspect the alternator belt. Let’s summarize the signs of your drive belt being loose: Sound is an indication of a belt being loose. The bearings on which the alternator rotates can also be at fault and hinder the alternator from providing an optimal performance. Depending on why it's making the noise (belt could be in the process of shredding), the belt could break while your out driving and then you'll have a certain amount of time to get home/mechanic before … The belt is very loose around alternator and component to the left of Alt. 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. A vehicle battery is consistently low on voltage. It also indirectly keeps your battery from dying as that is a role of the alternator. One of the most recognizable signs of a loose alternator belt is the high-pitched squealing sound that accompanies it. They are the V-belt and the V-ribbed belt. My dad's 2005 PD TDI has just lately been having a strange vibration sound. The serpentine belt may make various sounds when it rotates if it is not tight enough or is improperly positioned on the pulleys. A/c ,alternator belt extremly loose. I Lost power steering + engine bay noise started after 2nd gear romp. Symptoms of a broken serpentine belt include loud slapping, squealing or knocking noises coming from under the hood. It sounds as if your alternator belt is a bit loose and is slipping. … Your solutions might not be effective if the belt is too loose. The weird thing is that it goes on and off in about 30 second intervals. If it can be depressed more, then the belt needs to be tightened and/or replaced. #1. If I tighten the belt to specification (that is being able to twist it 90 degrees when tight) then I get the noise. Without a means to charge the battery you will be stranded when the battery is depleted. Which technician is correct? Other common reasons may be a damaged pulley (shreds the belt) or damaged/loose tensioner (belt is loose and falls of). It also indirectly keeps your battery from dying as that is a role of the alternator. Loose drive belts will result in a car making squealing noise. The more you accelerate, the louder the alternator whine will be. Engine Overheating #1. The battery-shaped charging system warning light might also come on because the alternator will stop charging the battery. robert mckinney in New Providence, NJ on . If the alternator belt is a little bit loose, it can charge the car battery but not … Well i replaced the belt twice. Well i replaced the belt twice. While the alternator tension is loose, you can remove the belt from the alternator wheel to check for bad bearings if you think this is an issue. The Wheels. The battery-shaped charging system warning light might also come on because the alternator will stop charging the battery. 1 answer & 0 comments. Also Read: How to Soundproof a Car/ Reduce Road/Wind Noise Tips on Tightening an Alternator Belt How to … Malfunctioning belt tensioners can loosen the belt leading to misalignment or, worse yet, the belt sliding off its pulleys. Automatic belt tensioners operate in a range, they use a calibrated spring to create this tension on the belt, that spring can fail causing a loose belt. Symptoms of a broken serpentine belt include loud slapping, squealing or knocking noises coming from under the hood. In this way, the belt keeps your fan, air conditioning, power steering pump, water pump and alternator working. Isnt the alternator not supposed to be that high up? Loud Noise Under Hood may be Loose Alternator Pulley Bolt. 2. Could it be the 4.99 Valu Craft belt I put on it? 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. Popular Answer. It isn't a loud squeal, such as with a loose belt, it's more of a light squealing/grinding sort of sound. 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. If your wheel well will build up ice over time, the strange noises will follow. I put dry soap on the belt and it makes no difference. 4. Faulty Belt. 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. You can often see this directly by inspecting the belt. Still no change. I'd be looking at the alternator, battery and the alternator belt first. A strong squeaky sound will … A bolt is sliding around near the belt causing rattling noise.. Is the belt a 1 piece serpentine? 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. I don't believe there is an auto tentioner for this belt. The alternator works by rotating, this rotation is made possible by the belt attached to the engine's crank pulley. The noise you are reffering to is most likely the fan belt noise. So I know its not the pulley or alternator being bad. Worn Serpentine/Alternator belt. While the alternator tension is loose, you can remove the belt from the alternator wheel to check for bad bearings if you think this is an issue. A belt that’s too tight can also put strain on the alternator. Failing Water Pump bearing. Here's what's happened: Yesterday afternoon, I was driving my 2009 Toyota Avalon with about 70,000 miles (v6 auto - as far as I know, the same powertrain as the V6 Camry). I run a boat apx 36 hours a week. Ok, its really cold outside, and when I start the car, it makes a high-pitch squeaky whine. 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. By: Sean A loose or worn-out alternator belt will cause some disgusting noises. When the vehicle is in motion, this is in charge of adjusting the alternator belt. One other thing that might lead to an alternator belt noise is when there are loose pulleys on either side of the engine. 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. . A belt can look perfectly fine, but make noise if it is old. Also, a broken bearing may create a knocking sound as it’s jostled around inside the housing. If you replaced the alternator belt with a low-quality product, then it might not … Turn the vehicle on and apply the r belt dressing onto the affected area while the engine is running. put a new belt on and within 30 miles it had scorched it down some and was loose.
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