Timing Belt Noise When Accelerating

The belt didn't wear or show any. Car Problems With a Rattling Sound When Accelerating by Robert Moore Rattling noise during acceleration can be caused by several different but common failures, including loose heat shields, bad belt pulleys and ignition pinging. Hum: If the sound reacts to acceleration and deceleration, investigate your differential. The replacement cost of the timing belt tensioner can be anywhere from $150 to $500. I had a tapping noise on cold startup that was still present no matter what RPM the engine was running at, however once warmed up the noise went away. No ticking noise just louder than normal like an exhaust problem but only at acceleration. He also works at a mechanic shop that I deal with alot. Subject: Grinding/Growling noise when accelerating Tue Aug 31, 2010 1:17 pm I started noticing this issue on my Logan (1. Scratchy squealing noise coming from front left tire area, Automotive, 13 replies Siren Noise , construction noise, engine noise. Whether idling or accelerating just after startup, if the serpentine belt or individual v-belts (depending on your car) are worn or loose, they’ll probably squeal and should be replaced. A rotating part, such as a belt, would make a squealing or winding sound. It will only confuse things. What bothers me is that the root cause has not been identified as they just ripped the old belt off not checking if that was originally installed correctly (valve timing). Muffler perhaps? No ticking. Ma Ford Edge makes a high-pitched noise when I accelerate: If your Ford Edge generates a loud noise when you accelerate, it is quite conceivable that the alternator belt is the reason of your issue. This will likely be the beginning stages of idler pulley problems or problems with the serpentine belt. Hyundai Elantra has a whinning noise when accelerating. i have had a noise like that and it turned out to be the timing belt tensioner, so had it changed with lots of other things that the garge told me it should have, i think it was £440 ish Re: whining noise when accelerating hard. Last week when I shifted my car to park the control center is telling me "shift. I was able to get the idle somewhat stabilized to set the timing, but it was not a perfect idle. There is one problem however. Catalytic converter may be clogged. Hyundai Elantra has a whinning noise when accelerating. Gets louder when you accelerate hardish in a high gear at low revs. The timing belt is new and not covered with oil anymore so it’s going to be a little louder. you need to replace the serpentine belt anyway, it's 7 years and it's necessary preventive maintenance. This "singing" would be noticeable immediately and will change pitch with rpm's. 2001 Santa Fe Engine Whine on Acceleration. Currently there are no oil leaks on this engine so I was not planning on changing cam or crank seals, or the cooling system hoses and belts as they still look good. Timing belt won't squeal, but the aux belt will. Loud squealing noise when accelerating HELP. X Research source Refer to the owner's or service manual for your specific vehicle to be sure you've run the fan or serpentine belt correctly. Someone said they heard a high-pitched squeal when accelerating. My car has 207000 miles. Could be your timing belt. Had a truck once and it would make the noise only when accelerating. The chain features an inverted tooth design. I wonder if it is the Timing Belt or some other internal engine Component. I have this hum noise (no clicking or rattling) just constant pretty loud noise when accelerating. Timing too advanced will cause pinging (a rattling noise usually heard on acceleration), overheating cylinder heads and other problems too scary to contemplate. Belt noise can mean the belt is worn or loose. Sounds like marbles in motor when I accelerate Rodeo MU > Sounds like marbles in motor when I accelerate. Timing Belt. The cause of the problem is the rocker shaft bridge has excessive clearance from the factory, which causes the rocker shaft to rotate and make noise. it sounds like the conveter has fallen apart and making the rattle noise, and the pieces can plug the exhaust shut causing a lack of power, or maybe you are hearing a spark knock, causes are cheap gas, needs a tune up or the timing belt might have slipped a tooth, if it has slipped a tooth you wont notice much change in the way it drives but the computer knows it has and it cant adjust the. Valve cover gasket. I recall that the noise appeared soon after having the ATF and filter changed. There may be clanking and shaking, caused due to the loosening of a timing belt. I'm getting a "whining/whirring" noise when the engine is revved. If the engine has a carburetor instead of fuel injection it probably has a mechanical fuel pump mounted to the engine. Check the belt during routine maintenance and always ensure that the belt is changed at the manufacturer's recommended change intervals. The exhaust system includes. Then you'll need a new or rebuilt alternator. A new timing belt (with timing belt kit, waterpump) and drive - Answered by a verified Hyundai Mechanic We use cookies to give you the best possible experience on our website. it started off with a. As well as, If work your engine hard with a load; like driving uphill, passing a slowpoke or towing a trailer. The sound can have only one source and that is the slip of the auxiliary drive belt or fan belt. 7 mm compared to 9. Ma Infiniti QX60 makes a high-pitched noise when I accelerate: If your Infiniti QX60 makes a loud noise when you accelerate, it is quite conceivable that the alternator belt is the cause of your issue. Understand the type of noise coming from the belt, then start troubleshooting. Most chirp noises occur as a short belt span enters into a grooved pulley, typically after exiting a backside pulley. 8L (for those with an LS) has a belt, with replacement at 100,000 miles (per the manual). A valve out of time can also cause a ticking sound. What's That Ticking Sound Coming From Your Car's Engine? As the oil breaks down after a few thousand miles it thickens, which eliminates the noise. I've been hearing what sounds like a metal on metal rattle/clunk while accelerating, the noise is constant and as soon as you lift off the pedal, the noise stops. In an overhead cam engine, the camshaft lobes themselves depresses the valve while in single cam engines, the cam actuates push rods that open the valves by moving a lever called the rocker arm. The noise never went away. Break pads are going. but a quick way to check would to be to take off the power steering belt, start the ca,r it makes the same noise its a/c ,if not is power steering pump. Hyundai Elantra has a whinning noise when accelerating. Turned out the vacuum line running to one of the front hubs came off and the noise was it partially engaged making a most disturbing sound. make sure the power steering belt is not loose. Understanding what needs to be done can be found in the following article. Timing belt won't squeal, but the aux belt will. Belt noise can also come when one of the pulleys the belt is riding on starts to fail. 0 liter petrol engine. Kia Sorento Noises. it started off with a. The timing belt is made of a hard rubber compound. Whether idling or accelerating just after startup, if the serpentine belt or individual v-belts (depending on your car) are worn or loose, they'll probably squeal and should be replaced. My car is a 2004 mazda 3 HB with 140,000 miles and a manual transmission. Each has its own unique characteristics, causes and solutions. Turned out I had a cracked power steering pump with extremely low fluid. Ok, I've read many a thread on the ways that dealers or shops have messed up the timing on the belt which causes: A. Is your engine making an annoying knocking, pinging or rattling sound when you accelerate. If you don’t replace the timing belt soon, then you could have entire teeth on the belt break off and go missing. I tried some high octane (92) gas, and it didn't seem to have any effect. It comes and goes, and seems to be more pronounced during harder acceleration. The technician hooked the computer up and the engine pass. Belt noise can mean the belt is worn or loose. Start the engine. Sounds Like A Bird In The Engine. Thank you for your help. It is important that the belt and bearing alignment is correct. rattling noise when accelerating up hill. Hello there, a few different faults can cause the vehicle to have this ticking noise. This rattling sound is more prominent during engine start up or when accelerating. I have been hearing a clunking noise in the front end while accelerating and engine braking. but a quick way to check would to be to take off the power steering belt, start the ca,r it makes the same noise its a/c ,if not is power steering pump. Easiest fix is to simply replace everything if you open up the timing belt system. Usually if your fan belts are worn, your timing belt needs replaced as well. my point is eliminate any possible noise/issues from the timing belt circuit first (which is critical, will cost $$$$ if OP neglect it ). If i drive between 50-60 km and i accellerete i feel it clearly, Anyone here with the same experience, sorry for my poor english. Wheel bearings are also a common suspect and may be failing. Its in the background a bit as i'm speeding up. Serviced by main dealer two weeks ago, mentioned it to them when leaving it in and they replaced a bracket on this exhaust but rattle noise is still there. When hot and at low speed and turning right the noise comes back. Past week its gotten louder to the point i can easily hear it when speeding up, though it seems to go away after driving for a bit (maybe 5-10 minutes). After warm up could not heat the valve train noise anymore. Serpentine belts are a great invention but unfortunately they drive everything on a modern engine which places a lot of load on them. I thought it was the timing belt bearing making the noise but I got that fixed it still made that noise. Hyundai Elantra has a whinning noise when accelerating. Faulty belts may also make whining noises. Head gasket / timing belt / water pump / front brakes replaced in December 2015. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. Diagnosing Misalignment and Belt Noise July 30, 2014 at 10:54am. customer is now having a stumble or slight hesitation when accelerating to pass or gain speed. I will now pretend that vacuum advance doesn’t exist. subaru forester squealing noise when accelerating. Regardless of the fault, you must identify and correct the problem quickly -- otherwise your problem will get worse. getting a worriesome rattle,grinding noise only when I accelerate from low rpm, like when I should have down shifted but just push on the accelrater instead. Strange thing it doesnt happen every time I step on the gas but I'd say half the time. The car has 70,000 and I haven't changed the timing belt yet since manual says 105,000. Slightly mechanical, slightly echoey and you just can't put your finger on it. My 13’ also has some driveline whining between 57-62mph under light acceleration. Timing belt won't squeal, but the aux belt will. rapid engine acceleration. I recently had the front left wheel bearings replaced and have not had the timing belt replaced yet or the transmission serviced for about 30,000 miles. The Murano rattles upon acceleration, but the rattle does not happen all the time. In addition, noise can come from the timing belt area or timing chain area. 2004 Hyundai Sonata Vibration and Loud Engine noise when accelerating. The replacement cost of the timing belt tensioner can be anywhere from $150 to $500. If you recorded the noise from under the hood I could tell you better, perhaps, but the difference is that the timing belt has ridges, and once contact has been made it will have a deeper, rougher, tympanic sound, oh, and within a few days you will be walking The noise I think I'm hearing is a higher pitch, smooth sound, that occurred when my timing belt cover was sticking out just a little at the seam around the water pump or main pulley, and the belt was rubbing on the cover. Hope you have decided which belt is appropriate for your car with this drive belt Vs timing belt comparison. This is new for the Honda accord in 2013, previous years Honda Accord had a timing belt. Toyota Camry 1997-2001: How to Replace Timing Belt and Water Pump. The only thing I found is the strut top moves front and back and side to side when I wiggle the wheel when. You will need to establish if this noise occurs suddenly and if it can stop as it started. A power mismatch is not the only issue that causes a popping noise from the subwoofer. Under heavy acceleration, between 3000-4000 rpms, there is a flat spot. If this belt, chain or tensioner becomes loose or is failing it can cause a rattle noise that follows the engine RPM's. This was replaced today. Your engine's timing chain or belt connects the crankshaft to the camshaft, for proper operation of the valve train as described above. The timing belt is new and not covered with oil anymore so it's going to be a little louder. Scratchy squealing noise coming from front left tire area, Automotive, 13 replies Siren Noise , construction noise, engine noise. If you're questioning what is normal engine noise, I may have the answer. There is one problem however. Without proper tension a belt will slip, the sidewalls will wear smooth, and the belt will eventually harden through “heat-ageing”, a process referred to as glazing. Update: Bad timing( possible a bad timing belt) Bad gas ( water in gas. They were going to charge me over $500 for this and to replace spark plugs. If the noise disappears when the serpentine belt is removed, one of the accessories the belt drives likely has a bad bearing or other issue. In this article, we will show you several possible causes and also discuss different treatments or precautions to solve this issue and enjoy the comfort of a long drive. You will need to establish if this noise occurs suddenly and if it can stop as it started. I only hear the noise under heavy acceleration from stop or while rolling. If this belt, chain or tensioner becomes loose or is failing it can cause a rattle noise that follows the engine RPM's. If it is nearly time for a routine timing belt replacement (every 60,000 to 105,000 miles or so depending on the car), you might want to have that done at the same time as the water pump, because timing belt service is one of the rare occasions when a water pump is easy to get to. I saw on this website that in fact my car a has a timing chain and not a belt. When i put the motor back in and cranked it up everytime I accelerate it makes a ticking noise like a ziptie is hitting the fan but it ticks only when i am accelerating it will not do it while its idling i was told it may be the timing chain but i need other opinions before i replace it. If you have a Honda Odyssey, Pilot or other vehicle equipped with the 3. One way to check may be to check the ignition timing. Even though the distributor position is the same, if the belt is off by one tooth, that will change your ignition-timing. This happens constantly. Subject: Grinding/Growling noise when accelerating Tue Aug 31, 2010 1:17 pm I started noticing this issue on my Logan (1. One of the most important components when it comes to regulating the timing of your engine is the timing chain. the timing belt will only whine if its been tensioned to tightly, installed a gates on mine recently can't hear a thing, you really don't have to tension the belt that much, all i did was rotate the belt and then simutaneously tighten the tensioner. My car engine makes a rattling noise when i accelerate hard or when im going slightly uphill. Lexus dealer said there is a small exhaust leak somewhere. Kia Sorento 2,5 ex aut. 5 Dlx) from May this year. I just purchased a used 2002 Forester with new timing belt, clutch and head gaskets but I noticed a whining noise when I accelerate that wasn't obvious on the test drive. The noise continues throughout acceleration and completely disappears when I get off the accelerator and coast. These bearings could be in the alternator, water pump, power-steering pump or pulleys that tension and guide the fan belts and timing belt. It seems that group of bearings go out more often than anything else. I think it's coming from the engine, and it seems to occur when I'm accelerating. High Pitched Whining Noise While Accelerating. Could this be the timing belt? I'm going to call the mechanic again today to go back in for the timing belt change but I'm worried that if this noise is the belt then it's going to break and knacker the car. This problem Only happens on acceleration of the Vehicle in ECO and Normal Driving. Upon accelerating, there is a chirping sound coming from the belt area of the engine. Belt noise can be hard to isolate, as the sound may seem to be coming from an accessory drive, such as the alternator or air conditioning compressor. Normal Engine: On a good engine, accelerate to around 2000 RPM and then quickly release the throttle. But there is now a noise that occurs only when I accelerate which doesn't look to be widely answered, but frequently asked by users on Google. If they did its time for a new engine or atleast a rebuild. This is at least double the amount of usage you can get from a timing belt even though the timing belt was. If I accelerate from 30 mph to higher speed or drive at constant speed at 20-20 mph or higher, I do not hear any. some times it makes a rattling noise when I'm at a stop. The timing belt is new and not covered with oil anymore so it's going to be a little louder. Later it turned out the belt was off one tooth, and I corrected it and replaced the spark plugs. Engine heat, vibration and moisture can cause these parts to wear down and break. You'll want to look at the timing belt as well, if it hasn't been looked at or changed recently. Then you'll need a new or rebuilt alternator. My car makes weird noise and doesn't accelerate I don't know what it is. When a Honda timing belt breaks (without warning), it causes. It was easy and simple, and it got rid of my belt noise when standing at idle. I came to find out that the oil does not reach to the most parts of the engine and it was caused by a poor performance of the oil strainer.  Whining indicates a problem with the transmission fluid pump and could be due to a low level or a failing pump. When in 4X4 it would disappear entirely. A broken timing belt can cause catastrophic engine damage, therefore it is vital to keep the timing belt in good operating condition. Paul, in second gear, accelerate from 2000 RPM through 3000 RPM and listen to verify this. 5s with 160k on it. If it only rattle when cold it is more likely that it is tapping sound from the hydraulic valve lifters. That was the timing belt tensioner which was cheap and easy to replace. The serpentine belt is given the proper amount of tension by a device called a drive belt tensioner. Most chirp noises occur as a short belt span enters into a grooved pulley, typically after exiting a backside pulley. The drive belt is made of a rubber compound and wears out over time thus producing screeching sound. When inspecting the belt, look for cracks or chips, and for teeth or ribbing that appears to be missing. A noise when accelerating can be caused by various problems. 8t 95,500 mi just randomly the other day my engine started making a loud ticking noise when i press on the gas. I'm getting a "whining/whirring" noise when the engine is revved. A belt tensioner that consists of a bolt plate that mounts on the engine, a spring-loaded arm and a pulley applies tension to the belt. 2013 Ford Escape 2. This is new for the Honda accord in 2013, previous years Honda Accord had a timing belt. PM's expert auto team takes you th. Do not reuse the timing belt, tensioner or idler if misalignment is found, replace them with new components to avoid engine damage or failure. I had it checked out by the mechanic, only thing he done was tighten the cover. In addition, noise can come from the timing belt area or timing chain area. This noise first appeared after a 3 hour highway trip. 4L Turbo version of the Cruze has a timing chain, which does not require regular maintenance). the sound is coming from the front. any ideas? Honda Civic. Check the belt during routine maintenance and always ensure that the belt is changed at the manufacturer's recommended change intervals. 5 OB @ 109K miles. I took it to a Nissan Dealership that came to the conclusion that I had a (brace yourself) inner engine noise. It will only confuse things. I pulled the timing belt inspection cover after first hearing the noise and there's no sign of damage to the new belt, but i've got to replace the idler for the AC tomorrow so while i'm in there i'll take the whole cover off and make sure everything is kosher. Have a passenger ride with you to increase likeliness of determining which side the noise is emitting from. Also, what is the going price these days for the timing belt replacement???. One of the biggest burdens today for professional technicians and do-it-yourselfers is belt noise, and the No. This rattle noise comes from the plastic cover of the timing belt. Also, it stops if I'm accelerating harder. customer is now having a stumble or slight hesitation when accelerating to pass or gain speed. If your up at about 120k miles you should look into getting that timing belt replaced before it gets you stranded somewhere. I'm doubtful that he'll be able to squeeze me in before the New Year. claimed that he needed to. This noise may be a sign of a slackened belt, in which case the tensioner roller or its wear and tear may be at fault. Well the noise is back again but louder. Any ideas what this could be?. In this video I show you how to find the cause of a squealing or squeaky drive belt or serpentine belt, both a lack of tension and improper alignment of the pulleys can cause a squeak or a squeal. Car started up no problem. Eventually, they’ll seize and the water pump will no longer operate, causing your engine to overheat. The wind-like noise only happens when I am accelerating from 0 to 20-30 mph. Different sound with different advance or retard on timing. The timing belt controls the action of the pistons and valves inside the engine cylinders to ensure the valves open in perfect time with the pistons. knocking sound from my engine after the dealer change my timing belt 4 Answers. If the bearings in the pulley are beginning to fail, they will make noise. A noise when accelerating can be caused by various. Anytime you hear a rattle it means something is loose and needs to be fixed before it breaks. 2001 civic 5sp noise when accelerating? He has a new clutch, timing belt, tune up, brakes and everything done on it and the noise persists. Lexus dealer said there is a small exhaust leak somewhere. This noise came on about last November when it got cold. It can be caused by:. Last week when I shifted my car to park the control center is telling me "shift. It makes same noise when decelerating from 30 mph and it goes away when the car stops. Consequently, you may hear a pinging or rattling sound when accelerating; driving up a hill, or when engine is lugging. 0 has been making a wierd whining noise. On accelerating over a certain speed, the noise disappears. I have a 1996 626 mazda V6 2. It was colder out than usual. - indiana_guy84 , North Judson, IN, US. It also makes a clicking/popping noise when turning left. Servicing your timing belt is usually accompanied by the replacement of the water pump and accessory belts, or sometimes the seals. It seems that the noise goes along with the RPM since it gets louder when accelerating. 11 Causes of a Vehicle Losing Power when Accelerating. Ford Ranger Worn Timing Chain Cassettes May Cause Rattling Noise From Engine - 18 reports. i would suggest fuel injector cleaners,. 2004 Hyundai Sonata Vibration and Loud Engine noise when accelerating. Car makes a high pitch whine when turned on and when accelerating. It comes and goes, and seems to be more pronounced during harder acceleration. 6 and I heard the same ticking noise when accelerating. 4L V6 The noise is only heard when accelerating in drive or reverse and not heard in P and N. Generally, if the belt is “squealing” intermittently …and this would typically happen when accessory loads are high …such as when the A/C compressor kicks on or maybe when you’re at full lock with the power steering …might be when heavy electrical loads are put on the alternator …other times the belt squeals typically occur when accelerating the vehicle …then the belt has stretched or worn and/or the belt tensioner is worn in that it can no longer generate enough tension on the belt. My car makes weird noise and doesn't accelerate I don't know what it is. Diagnosing Misalignment and Belt Noise July 30, 2014 at 10:54am. One of the causes this code is a broken or cracked flex plate. if they have the belt to tight, then yes, some guys like to lever the hydralic auto tensioner alittle just to ensure belt is tight, if done to much then it DEFINITELY will whine. The noise while at idle is coming from the belt tensioner, why I have no clue. It only happens when it is cold and accelerating, when the car is warm the noise goes away. You will need to define if this noise appears abruptly and if it can stop as it started. Please let us know what happens. The smaller links engage at a lower impact speed, which decreases the noise. Well now it sounds like a moped going down the road. It makes a high pitched noise when I start it, then it consistently hums when I accelerate, although it makes less noise when I get into 2nd gear. Seriously - At one stage, I was half-expecting to see a comment about wiper blades or something. If this timing is off, the engine will run erratically, if it runs at all. Gets louder when you accelerate hardish in a high gear at low revs. If the noise is present, it is a timing belt ilder/pulley. 2001 civic 5sp noise when accelerating? He has a new clutch, timing belt, tune up, brakes and everything done on it and the noise persists. I'm never buying a Hyundai again. They said they couldn't pinpoint the noise, but thought it might be the timing belt tensioner. No ticking noise just louder than normal like an exhaust problem but only at acceleration. 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. Even though the distributor position is the same, if the belt is off by one tooth, that will change your ignition-timing. Get the straigner cleaned and everything will be OK. Serpentine belts are a great invention but unfortunately they drive everything on a modern engine which places a lot of load on them. Start car w/o alternator belt and confirm noise has disappeared. Both vehicles with a timing belt or a chain have a tensioning system to keep it snug and centered. If the noise is gone, of course the problem is a belt driven accessory. That didn't help. There is no noise coming from the timing belt. Since the timing belt is responsible for, well, the timing of your engine cylinders, your engine could misfire when the cylinder is opened or closed too early. Hum: If the sound reacts to acceleration and deceleration, investigate your differential. Start the engine. I thought it was either the timing belt or power steering cause I have a small powersteering leak. Avoiding a drive belt repair can cause much bigger problems. 1 cause of belt noise is misalignment. This may cause the belt to 'slip' while accelerating. Sounds louder than it should when accelerating. Pull the timing cover and look for shaved/burnt plastic and an oil leak in that area. That 1989 Corolla of yours makes all sorts of noises Toyota hoped it never would, most of which are as harmless as they are annoying, yet some of which can be as detrimental as they are deafening. 9 tdi, 130hp, year 2002, 115. No pressure loss. If, after a long journey I turn the engine off then wait about 30 - 45 minutes, the car will drive fine with no loud "growling" noise. Now when I first start accelerating from a stop, it makes a vrrrrrrrrrrrrrrrrr revving sound at about 5mph and then by 10 mph its gone and no further sounds but it does it every time I stop again and press the gas I hear it again. This happens when the valves are opened by the crankshafts and. If it only rattle when cold it is more likely that it is tapping sound from the hydraulic valve lifters. Why does your Honda accord make a whining noise when accelerating but stops after about 45mph? Top Answer. a bad pully for a belt. The noise is more noticeable in 1st, 2nd and 3rd when accelerating. the old belt wasnt that old so my guess is that it just randomly got a cut or something in it somewhere lol. Belt squealing is often caused by a single problem, but if not corrected quickly can create further reasons for squealing. But there is now a noise that occurs only when I accelerate which doesn't look to be widely answered, but frequently asked by users on Google. I saw many comments about the noise when it's cold, but with my Rio, even -25C the engine sounds ok. On my xterra I can only hear the noise with the hood open and standing in front of the engine. Accelerating ----> Noise Cruising ----> Noise depending on the engine equipped with the vehicle, it may not even have a timing belt (1. Slow acceleration with louder engine noise 2016 Nissan Pathfinder As he was testing it, the timing belt slipped and caused damage to the valves. Well the noise is back again but louder. I took it to the mechanic to change the timing kit but the noise is still there. This "singing" would be noticeable immediately and will change pitch with rpm's. Quiet in park. Yesterday, the sound got more pronounced and I noticed that I was starting to experience some of that same scraping/grinding when I would accelerate, but not when I was going a constant speed. I would also start with checking your oil and transmission fluid level and make sure they are full of fresh fluid. If it only rattle when cold it is more likely that it is tapping sound from the hydraulic valve lifters. The vibration is quite noticeable in the steering wheel. fuel filter,. whats up fellow 2. The whining noise goes with the RPM of the engine, except at idle I can't. So, drive worry free when you have resourceful belts!. Damaged timing belt can cause the engine problem. TSBs - Some 02 (99 - 02 ) Mountaineers With A 4. particular. It makes a high pitched noise when I start it, then it consistently hums when I accelerate, although it makes less noise when I get into 2nd gear. and if the belt is tight. -chirps constantly-squeals constantly-squeals when wet or moist outside-squeals when cold-or any combination of the above. a squealing noise when accelerating a SEVERELY worn or loose belt may cause a discharged battery, engine overheating, or lack of power steering assist 11. ,how do I know? I was a mechanic. In addition, noise can come from the timing belt area or timing chain area. This isn't a hissing noise coming from a belt, it sounds more airy. It makes the the noise too when I rev up the engine in neutral. Any thoughts? PLEASE HELP. If this timing is off, the engine will run erratically, if it runs at all. It seems that the noise goes along with the RPM since it gets louder when accelerating.