Alternator Noise

8 out of 5 stars 6. RFI Noise Filters; 3 Item(s) Show. That is 4 months out of warranty and the noise (ac ripple) coming out of that thing is. Or you can tune a weak signal on an ordinary transistor radio and see if you hear alternator noise in the passenger area. Mine actually loosens via the alternator long bolt that releases tension on belt. Alternator slippage and undercharging can also be caused by a bad alternator pulley. Look at any rubber isolators on the alternator, see if they have deteriorated or moved, and pry slightly on the alternator mounting to see if the noise changes. 1 - 15-Amp Noise Filter, Heavy-duty suppression of alternator & ignition noise, Land mobile class in-line filter, BR-FILTER. An automotive alternator is responsible for providing the vehicle with electrical power while the engine is running as well as charging the battery. Alternators are normally replaced as an assembly. Identify the real cause of the fan belt noise and fix the issue for good. Has plenty of heat. But in most cases, the cause of the noise is a bad idler pulley. I got a few complaints that the whine was on my transmitted signal. The alternator is a key component in running the electrical systems in your car. The good news is that replacing a factory alternator with a high output alternator, in and of itself, isn't going to damage the rest of the electronics in your car, even if the new alternator is much, much bigger than the old one. Last when removing the alternator you will ask why can't not just remove the idler bearing bolt- becasue there isn't room to remove the bolt and bearing. The remedy is relatively simple, but the engine has to be removed to do it. It has a rattle or growl that appears to come from the alternator drive. With the car off, the battery was 12. It would be in the best of your interest to contact an expert. so i'm getting juice back to the battery. We'll have to wait and see. Sounds to me like there is a draw already on the alternator. for what i read I'm assuming the alternator is dead, or near death, and that the transmission has some sort of electronic clutch. Thanks IC for the tip about the alternator. The alternator pulley typically spins about two times faster than the crankshaft pulley to produce the necessary power for the vehicle at lower engine speeds, especially while idling. The noise stopped & front speakers were fine. Tested voltage at alternator while running and all is good. Double the capacitance compared to OEM alternator filters, which results in a better performance in the elimination of RFI generated by aircraft alternators. The alternator is one of the parts you want to function properly, otherwise all the comforts given by the electronic. In reality, the battery is responsible for getting the engine started and can get you a little way on reserve, but it's nothing without the alternator. My 2002 t&c is making noise at cold start and another at shut off that make me think it is the alternator clutch pulley. Item Qualifies for Free Ground Freight (48. Alternators are normally replaced as an assembly. 5 Signs of a Bad Alternator. so i'm getting juice back to the battery. The first thing most people think about when it comes to automotive charging and electrical systems is the battery. Before making a service appt. Front lights, break lights, heat, windshield whipers, leaving the car. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of rotation of a shaft. Voltage output appears fine on the new alternator, since it maintains about 14 volts at idle with the headlights on and the heater fan on high. It would be in the best of your interest to contact an expert. The alternator noise. Sounds to me like there is a draw already on the alternator. Once I have the engine fixed I may be able to run the bike without the alternator attached, which would eliminate that as the source of the noise. 5 Signs of a Bad Alternator. There is a noise coming from my alternator that sounds like a whine, whistle or squeal. You can purchase these at a Radio shack or electronics store to take the alternator noise away. Almost the only way is a supressor capacitor across the alternator terminals. Mechanic replaced all parts inside alternator (Rebuild) including bearing and now alternator is charging fine but making Whining/Whistling noise. Where to next?. The noise is now gone and the motor sounds much quieter. It is the job of the battery to provide the power to crank the engine and start the vehicle, however, it is the job of the alternator to make sure that the battery stays charged. Noise from bad alternator The video that you posted CKVPatriot was so helpful. when the truck is turned off for a while and i cut it back on, the noise is low, then gets louder again. Replaced interior lighting with LEDs (solved buzzing noise while interior lights dimmed while turning off) Took an oscilloscope to various wires (yup, there's noise alright) Probably other stuff I'm not remembering. Alternators run at 2-3 times the cranshaft speed, which is about 1,000-7,000 RPM. The alternator belt is a car part which can be bought from Teimo's Shop for 295 mk. If the alternator fails, the dashboard battery warning light will turn on while you drive. An increase in RPM's causes an increase in the pitch of the. Return the electrical system back to stock. Make sure to check that your head units data cables (wifi, GPS, USB, etc. so i knew my alternator was broke. Mostly, EMI and noise interferes with sensitive computer, audio, and radio equipment. I would get it fixed. Glazed streaks on the belt or belt noise when high-load electrical accessories are turned on with the engine idling can be signs that the belt is slipping. Any grinding noise (like a bad water pump) means the alternator is on the way out. Do you think it's time for a rebuild or. 1 - 15-Amp Noise Filter, Heavy-duty suppression of alternator & ignition noise, Land mobile class in-line filter, BR-FILTER. This was causing a buzzing noise into the car radio. Ideally, you want to place your scope leads on the alternator B+ terminal and against the alternator case itself. One give away that it is the injection system and not the alternator is that while the frequency varies with engine RPM, the amplitude will vary with throttle position. 3000 engine rpm, the alternator fan can cause a whining noise. Honda engineers use inverter technology to integrate parts from the engine and the generator. If this is the case, you can install an alternator noise filter on the power line between the battery and the alternator to. I checked it afterwards and found the noise came from the alternator. Never had any issues with napa stuff. This pulley is designed to enhance low RPM charging for maximum output. Fixing or replacing it is the only solution. It’s a question of time before the alternator goes out. I would turn in the core (worn alternator) and get a discount towards a remanufactured one from Audi. When the car was in neutral or park the noise was not there, but in gear he heard the noise and identified it as the alternator. Mustang Alternator and charging system 1965 and 1966 This is a system which seems to be a prolific source of confusion and despair for people, but it is actually quite simple, once you understand it. Had it serviced about 3 weeks ago as it was due, and the mechanic did mention that I would be due a timing belt change soon so I told him I'd be back. I think that I really need to inject some grease into the bearing (hypo-needle) or how do I remove bearing. Noise increases with revving. I have a 2005 Peugeot 206, had lots of problems when I first got it 2 years ago but it's been very reliable after the first 6 months of hassle. The alternator shaft bearing alerts of mechanical failure by making a howling or grinding noise, but other symptoms may appear, including: Battery warning light illumination Engine will not start Engine stalling or hesitation Power. Squealing from a new belt is usually one of two things - loose belt, or misaligned pulley. Quality Aircraft Accessories stocks a wide variety of Hartzell Alternators. A rapid crackling, or a ticking noise, This Lucas ACR alternator has the capacitor fitted between the warning-lamp terminal and earth. Tested voltage at alternator while running and all is good. The battery was bought in 2008, a Napa Gold. Check the alternator's bearings - Place one end of the rubber hose on the alternator case and the other end to your ear. I had one fail on my truck and it was letting nearly 1v of AC into the system which made the computer have a few issues amongst other things. Bike has 27,700 km or 17,300 miles. One red going to the back of the alternator and a red and brown going to the side of the alternator in a black connector. My 2002 t&c is making noise at cold start and another at shut off that make me think it is the alternator clutch pulley. 1 - 15-Amp Noise Filter, Heavy-duty suppression of alternator & ignition noise, Land mobile class in-line filter, BR-FILTER. The whining sound is a sign that the bearings in the alternator are going out. There are several possible causes of alternator whine and troubleshooting is the best way to. Took it to the dealer and replace the. Heard what sounded like a grinding type of noise coming from under the hood on my 2500HD and sounded like a bad bearing on either ideler or alternator, so turns out it was the alternator. My 2002 t&c is making noise at cold start and another at shut off that make me think it is the alternator clutch pulley. but the ratling that its making is somwhat like a plastic sound even tho there is no plastic around that areaand its coming from the left side of the engine. There are several signs you need to watch for that may indicate your alternator is bad. This interference takes the form of popping or static on radios or audio gear and can render a vehicle or radio or other electronic equipment useless. 2010 Koup alternator noise-video added Just a new guy here with hopefully a easy question. I have replaced the belt 4 times and the pulley once. I looked to see if the cooling fan on the alternator was clipping the support arm or the cambelt cover, but it seems to be clearing them both by at least a couple of mm. It's usually caused by a ground connection that is less than ideal. If the Lexus alternator output isn't up to spec, your battery never really gets charged from starting the car. » More symptoms of a bad alternator. Noise and Noise Suppression EMI electromagnetic interference. If excessive magnet field whining still occurs: Replace alternator. 8 out of 5 stars 6. Notice I said 2 years and 4 months. Bottom line is if you are getting noise through the speakers there is either a grounding/connection problem or alternator noise suppression issue. Its pitch will usually vary with engine speed. A progressive squealing sound, or a sound that gets louder and makes a squealing noise, is a sign of alternator bearing problems. Solution: Check charging condition of battery. Alternators can also be water cooled in cars. When the car was in neutral or park the noise was not there, but in gear he heard the noise and identified it as the alternator. Took it to a mechanic who listened with a long screw driver and said it's from the alternator bearing. Identify the underlying cause of the whine to silence it for good. This is a problem that will only get worse as time goes on. What is Alternator Noise? Alternator noise is a high pitched whine caused by the car's electrical system. Then a load put on the Alternator and. This simple design has proven to be very durable under the harshest conditions. If the Lexus alternator output isn't up to spec, your battery never really gets charged from starting the car. They can squeal, rumble, tick, clack, and snap. Verified the noise was not coming through the antenna lead. My 2002 t&c is making noise at cold start and another at shut off that make me think it is the alternator clutch pulley. 3L and it's alternator (DR44) and PS pump made no noise at all, no whine, no buzz in the cab, nothing. If you take the belt off and spin the alternator pulley by hand you should be able to feel bad bearings dragging and it won't be easy to spin. The noise is a little bit reduced in intensity but it still persists especially while accelerating the car. About 16% of these are earphone & headphone, 1% are dc motor, and 1% are integrated circuits. Make sure to check that your head units data cables (wifi, GPS, USB, etc. Look at any rubber isolators on the alternator, see if they have deteriorated or moved, and pry slightly on the alternator mounting to see if the noise changes. Front lights, break lights, heat, windshield whipers, leaving the car. Alternator je blog o hudbe. The mechanic should rule out other potential problems that come with similar symptoms, such as timing belt problems. Replaced interior lighting with LEDs (solved buzzing noise while interior lights dimmed while turning off) Took an oscilloscope to various wires (yup, there's noise alright) Probably other stuff I'm not remembering. I fitted this alternator but the clutch made a terrible screeching noise. Mpow Ground Loop Noise Isolator for Car Audio/Home Stereo System with 3. How do i get rid of the whine from the alt? my wires for the amps are not all running togother. Front bar compressed into engine/alternator area. Or you can tune a weak signal on an ordinary transistor radio and see if you hear alternator noise in the passenger area. Older vehicles with generators tend to require much more maintenance than newer models, but there's no hard and fast rule for how long an alternator will last. 6 (or higher) but the battery bus is 12, the answer is connection. It's usually caused by a ground connection that is less than ideal. Alternator of my car was not charging because of bad Regulator so thats why battery was dead completely. If the bushings that the alternator is mounted on have gone bad, a noise will be produced. bad noise coming from alternator area at idle only, rev engine a couple rpms noise goes away. However, I replace it today and the noise still persists. If the Lexus alternator output isn't up to spec, your battery never really gets charged from starting the car. I suspected the alternator was on the way out as coming to lights behind other cars, I noticed that once the car settled down to it's idle RPM the headlights would dim somewhat. This pulley is designed to enhance low RPM charging for maximum output. It also took care of my noise issue with my marine radio and i can transmit further becaus of no interference that ever before. I have a 2010 Koup 2. This simple design has proven to be very durable under the harshest conditions. Belt tensioners are extremely important in the proper operation of the accessory belt drive system. In last 3 weeks, the belt tensioner area making very loud noise (like metal to metal rattle sound) when the car is in idle but hear nothing when driving. No periodic maintenance on the alternator is required. I first thought it was the serpentine belt wheel to the right of the alternator, so I replaced that. Alternator slippage and undercharging can also be caused by a bad alternator pulley. If the belt is worn or loose it will make the voltage supply from the alternator weak and may also make a loud squealing noise when the engine is accelerated. The fan is attached to the front (front is front of car) of the generator or alternator and is driven (along with the generator or alternator) by a belt from the crankshaft pulley. One of the first symptoms of a bad or failing alternator is the need to jump start the vehicle on a regular basis. The first thing most people think about when it comes to automotive charging and electrical systems is the battery. XC90 V8 Alternator Replacement - On 20120208 at 92,415 miles, I got a red triangle indicator and a “POWER SYSTEM SERVICE URGENT” message in the message center, along with the. Voltage has been around 13. for what i read I'm assuming the alternator is dead, or near death, and that the transmission has some sort of electronic clutch. If it is a diesel , they have a one way clutch in the alternator pulley that will make a hell of a noise sometimes , they also had some trouble with the injector learning the idle correctly and rattling bad sometimes also the wiring to the injectors can cause the same symptom. Keep in mind the factory cables weren’t designed to handle the juice of a higher-output alternator, and can restrict the flow of electricity. Heres another tidbit. An alternator has fast moving parts surrounded by air, so it will make a noise in operation, in much the same way a desk fan makes a noise. Re-installed equipment a couple of times. I pulled the belt back off and tried pulling the alternator pully side to side and it did and when I did that it made a clicking noise. also check engine lt came on same day of noise - Answered by a verified Ford Mechanic. The book says you can remove and replace the alternator without pulling the carbs. I replaced the accessory belt and the tensioner assy. Torque Converter Issues and Alternator Noise Testing Before Testing - IMPORTANT PLEASE DO NOT SKIP! Before doing any testing of the alternator for AC noise, make sure to remove any and all wiring modifications. Noticed a subtle "whine" noise and shortly after the battery light came on. Alternator Voltage Regulator AVR AVR-20 ★ Alternator Voltage Regulator AVR AVR-20 Buying Tips And Tricks You Can Use Today. A "hum" can be caused by a bad alternator bearing or burnt diodes. The J&M filter removed all the alternator noise that I used to get on my Sirius radio from the LH pocket DC outlet and was a very easy install. Contact us today with any questions!. I had to tap on the Starter to get it to work! off. Identify the real cause of the fan belt noise and fix the issue for good. I know the unusual noise is coming from the alternator. For example, the alternator on our EU1000i, EU2000i, and EU3000iS is combined with the engine flywheel. The bearings are inside the alternator and are what the rotor rotates on to create the power. Many of the parts we sell come with a one year warranty. Make sure there is no extra grounds, reloc. The attached Figure I provides information. However, just recently my alternator started making a loud humming noise. The J&M filter removed all the alternator noise that I used to get on my Sirius radio from the LH pocket DC outlet and was a very easy install. The mechanic should rule out other potential problems that come with similar symptoms, such as timing belt problems. on the Alternator override and or govern the Cold start advance/high idle circuit? I can see how in operation it can easily cool down and go to high idle. Alternators don't squeal. the alternator was charging at or below 9 volts. If you notice a squealing noise coming from the front of your vehicle, it could be from the serpentine belt. Just wanted to say that I purchased the J & M GL 1800 Ground Loop Isolator filter (also available from Wingstuff) for my 09 GW. Once the alternator has been identified as the source of the sound, remove the drive belt and turn the pulley by hand. In this article, I present some of the possible causes of whining noise while accelerating. This noise indicates that the system either has a bad ground, defective head unit, defective amplifier, bad RCA cables, improper installation, or a problem in the vehicle's charging system. The noise was a whirring buzz sounded like dry bearings chattering. A major emphasis has been placed on build quality and interior refinement, improving comfort while reducing noise vibration and harshness. Soon after, all electrical components will begin to lose power, the vehicle will stall, and a jump start won't work. Side note: The noise is pretty bad when the car is first started, but gets quieter as the car warms up. Noise from bad alternator The video that you posted CKVPatriot was so helpful. 5 out of 5 stars 3,489. There is a noise coming from my alternator that sounds like a whine, whistle or squeal. Click to Enlargen. If your vehicle won't start, it's usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter. Same sound- like an alternator bearing whine or maybe power steering when cold, then decreasing as engine warms. The noise is only audiable when the radio is transmitting. If the alternator noise is the loudest electrical noise in the car, that’s what you’ll hear whether the alternator is failing or not. When I had some sounds I did this and found that the bearings were all gonedown into the sump, into the gearbox and ruined the bottom end of my engineHope you catch any problem prior to big repairs. This will cause the belt to slip across the pulley surface during belt and alternator speed fluctuations. In most cars, if the alternator has failed, your car will not start. For stubborn alternator noise, our Alternator filter. This is a problem that will only get worse as time goes on. If the bushings that the alternator is mounted on have gone bad, a noise will be produced. This method all. The 2007 Chrysler Sebring has 1 problems reported for alternator bearing making loud noise. An increase in RPM's causes an increase in the pitch of the. I have this intermittent rattle noise coming from the front of the motor. A tensioner maintains the correct amount of tension on the belt at all times throughout its duty cycle. With 6 Groove Serpentine Pulley. ) are routed away from your speaker wires. Pull the circuit breaker and the noise stops. Nice job documenting the noise with the video recordings. 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. However it really didn't help the noise all that much. A grinding noise coming from the alternator is likely a sign that the alternator is about to fail. [email protected] It’s a question of time before the alternator goes out. hook the 3 wires from the alternator. It gets progressively worse as I rev the engine more. anyone no how to stop it or what the problem may be. Same sound- like an alternator bearing whine or maybe power steering when cold, then decreasing as engine warms. It was assumed that you had pinpointed the noise to the alternator and eliminated the other possibilities like the tensioner and idler pulleys or the belt itself. The cause of the whine is a bad. 1 Electrical noise generated by the electrical system of a vehicle, as well as local ambient noise, can interfere with normal operation of mobile radios. Make sure there is no extra grounds, reloc. One red going to the back of the alternator and a red and brown going to the side of the alternator in a black connector. However, this item may be purchased online to be shipped to home or may be purchased in person by visiting a NAPA store. Or you can tune a weak signal on an ordinary transistor radio and see if you hear alternator noise in the passenger area. Curing Radio Noise. Manufacture starters and alternators for racing and show cars. Browse our selection of Hartzell Alternators below. However, the problem still persists. Hi all, I am working on my brother's 2010 CRV. Verified the noise was not coming through the antenna lead. Look at any rubber isolators on the alternator, see if they have deteriorated or moved, and pry slightly on the alternator mounting to see if the noise changes. Replaced the original alternator on my 2001 V70 T5 with 185K miles (only put out 12 volts, rather than usual 14+ volts) and battery repeatedly ran down after charging. Current Problem When I turn on my truck I get alternator noise in all of my speakers. Grinding is usually caused by a broken, dirty, or worn-out bearing. They can squeal, rumble, tick, clack, and snap. Once I have the engine fixed I may be able to run the bike without the alternator attached, which would eliminate that as the source of the noise. Noise from an alternator can be early symptoms of it going bad. There are several signs you need to watch for that may indicate your alternator is bad. I just put a brand new Browning 15A Noise Filter in line with the radio. the pump was changed in late '04 for '05 model year Pacifica's, which don't make the "whining" noise. I've changed the ground on the head unit to a separate point welded to the. Your alternator performs a crucial role for your truck, and AutoZone is the premier destination for Ram performance alternators. Hello all, My question is, whenever my car sits overnight. After the dealer mistakenly replaced the a/c compressor, they ended up replacing the belt tensioner, belt and 2 pulleys. This is considered a NORMAL condition and is caused by the rotor "slow-down" function that is built into the alternator. Fixing or replacing it is the only solution. The alternator belt transmits power from the crankshaft to the alternator and water pump, which supply electrical power and circulate coolant through the engine and radiator, respectively. Just replaced the alternator clutch fan and water pump. Visit Dan Cummins Chevrolet Buick in Paris KY serving Lexington, Louisville and Cincinnati #1G4PP5SK4D4207958. Solution: Check charging condition of battery. I checked it with a stethascope. It seems obvious from the video with the belt off it's a mechanical problem with the alternator (bearing). i just tried to pin point the location. The alternator pulley typically spins about two times faster than the crankshaft pulley to produce the necessary power for the vehicle at lower engine speeds, especially while idling. 6 Common Symptoms of a Failing Alternator A whining noise coming from your car's engine can indicate a multitude of different issues. An easy way to tell exactly what it is making the noise is to take a long pry-bar or a long screwdriver, touch it to the alternator (or whatever you suspect is the problem making the whining noise) and then put your ear up to the handle of the tool and touch it to your ear. Our high output alternators are equipped with an overdrive pulley. This kind of noise may originate from your fan belt, alternator pulley, or from the modern serpentine belt, so you will have to figure out which one is the perpetrator. The fan is attached to the front (front is front of car) of the generator or alternator and is driven (along with the generator or alternator) by a belt from the crankshaft pulley. If one of these parts becomes worn or breaks, this could cause a grinding or whining noise. for what i read I'm assuming the alternator is dead, or near death, and that the transmission has some sort of electronic clutch. 2016 Alternator Optima Alternator Sale. Im 100% sure its the alternator not the belt you can unplug the regulator wire from the alternator and it stops making noise, its a new alternator because i think the other regulator went out. When searching for the right solutions, the guidance and answers of Experts will help owners to ensure that the right repairs are done. An alternator that's going bad can affect your car in many ways. 1973 - 1979 F-100 & Larger F-Series Trucks - Weird rpm dependant humming noise from radio-alternator maybe? - Ok guys this may be a bit long and have several seemingly unrelated parts but please give it a think and let me know: 1) My battery is new as of about October. If you're hearing a whining, it's more than likely caused by the voltage regulator telling the alternator to charge more than it should be at the time. The alternator is a key component in your car's electrical system, turning the energy from the crankshaft into useful electricity to power your vehicle's electrical systems and to help the battery recharge. I fitted this alternator but the clutch made a terrible screeching noise. If it is a diesel , they have a one way clutch in the alternator pulley that will make a hell of a noise sometimes , they also had some trouble with the injector learning the idle correctly and rattling bad sometimes also the wiring to the injectors can cause the same symptom. An alternator may make a clicking sound if the bearings or other internal components are beginning to wear. I have two of the top of the lines that are now sitting in the garage. If you notice a squealing noise coming from the front of your vehicle, it could be from the serpentine belt. As it warms up, it's able to better "grip" the. Filtering out alternator noise can be simple or a challenge - it all depends on a bunch of things. Is this a common issue? Any information would be greatly appr. D7 E noise in transmision line Cat D4 engine Need 933 D2 cat parts Hauling from Pittsburgh, PA to several states Cat 246 Skid Steer bent ram on bucket cyl. Squealing from a new belt is usually one of two things - loose belt, or misaligned pulley. Eventually, you may also notice the alternator may begin to smoke a bit due to the friction caused by the worn out bearings. In reality, the battery is responsible for getting the engine started and can get you a little way on reserve, but it's nothing without the alternator. Just wanted to say that I purchased the J & M GL 1800 Ground Loop Isolator filter (also available from Wingstuff) for my 09 GW. As soon as i increase the revs the noise stops. Noise from bad alternator The video that you posted CKVPatriot was so helpful. Hi, I have a 02 Altima 2. An increase in RPM's causes an increase in the pitch of the. Alternator Noise Filters suppress noise on CB, 2way, and other mobile radios, as well as other mobile electronics prone to alternator noise. Identify the underlying cause of the whine to silence it for good. Fixing or replacing it is the only solution. I have a 2010 Koup 2. The most common and the most annoying. Making noise when started the engine, took over to PepBoys to have it check and they told me its the bearing is bad. I removed the alternator and took it to Autozone where they verified it had bad bearings. Glazed streaks on the belt or belt noise when high-load electrical accessories are turned on with the engine idling can be signs that the belt is slipping. Heres another tidbit. So then I reconnected the battery and started the engine without the belt and the awful noise was gone. The only thing that really wears out on alternators in my experience are the brushes. I have never had a bad one make any noise before and i have had a few go on me before. If you're hearing a whining, it's more than likely caused by the voltage regulator telling the alternator to charge more than it should be at the time. An automotive alternator is responsible for providing the vehicle with electrical power while the engine is running as well as charging the battery. the longer the truck is running, the louder it gets. A discharged battery may result in a vehicle that is hard to start, or doesn't start at all. Don't look for interviews, articles or reviews here. If I was a doggie my ears would have pointed upward when I heard the noise in your video. The alternator shaft bearing alerts of mechanical failure by making a howling or grinding noise, but other symptoms may appear, including:. I've changed the ground on the head unit to a separate point welded to the. It would be in the best of your interest to contact an expert. Notice I said 2 years and 4 months. The alternator tests bad under heavy load (with AC and lights and rear defrost, voltage drops below 13V and keeps dropping), but puts out voltage to spec when not loaded like that. I've changed the ground on the head unit to a separate point welded to the. Hello, if you hear a bearing that is noisy in the alternator, the only repair is to replace the alternator. Car Audio Noise. This alternator on a Toyota, came in with the owner complaining of a whine under the hood. Grinding is usually caused by a broken, dirty, or worn-out bearing. This filter's wire won't break at the case and its clamp is made from heavy gauge steel. ok now with all that stated my. Just wanted to say that I purchased the J & M GL 1800 Ground Loop Isolator filter (also available from Wingstuff) for my 09 GW. If not the noise may be coming from the engine, possible tappet, cam noise or crank pulley being loose. This is a problem that will only get worse as time goes on. The alternator may be old and the noise may be due to worn bearings but if it’s working, it’s working. 13 with higher rpms. The 2007 Chrysler Sebring has 1 problems reported for alternator bearing making loud noise.