Mercedes :: High Pitched Whistle That Gets Loud And Then Slowly Tapers Off When Heater Turned On
Dec 19, 2015
My wife loves her Mercedes 1999 320CLK. Low mileage (120,000), excellent interior and body condition. One problem. When she turns on the heater there is a very high pitched whistle that gets loud and then slowly tapers off. This repeats from time to time. Randomly there is a sound like a flap/door slamming shut. All sound comes from behind the dash. Also, from the dash behind the steering wheel area you hear a sound kind of like someone squeezing a plastic water bottle - plastic crackling sound. Our mechanic took a look at this and told us that some sort of hose was loose. It was reconnected and things got better for a little while....now its back. Once in a while this happens with the AC.
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My car occasionally makes a high pitched whine while driving it's very loud and very frustrating. I've come to the following conclusions: It only happens when the car is warm, it only happens at speeds above 40mph, it doesn't correspond to either accelerating or decelerating, it happens either way and in between. I've had people in the car while it's happened and the noise seems to come from the driver's side rear wheel. Sometimes it gets so loud and then gets even louder when I begin to apply the brakes, it's as if it starts screaming.
I've had mechanics take apart the complete brake system on every wheel and put them back together. They've put anti-squeal on the brakes to no avail. While driving the noise can come and go, with no apparent reason why. It happens in rain and on warm sunny days. Also, the noise seems to oscillate as if it is something that's spinning, I'd guess it's at approximately 160 beats per minute. This has been occurring for about a year, it was not this way when I got the car. No mechanics have ever found anything, but it's so loud! And so annoying and embarrassing. This can't be normal, what is it!?
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So now that it is winter, I have started to use the heater in the car. It works fine for about 10 minutes until a loud high pitched noise starts. Sounds like something is grinding. Any clue what it is? Is so, how to fix it?
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My 2008 Honda CR-V emits a high-pitched whistle (dog whistle-esque) when going up hills in central PA. I suspect an air intake noise, but am concerned that other than moving to the Dakota prairies is there a remedy?
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Hear a high pitched whistle inside the cabin while driving above 60 mph? I can even hear it over the radio most of the time, with the windows up! I have found it to be the mirrors! After hearing this noise, and pinpointing when it occurs, we finally found it is the mirrors. When they are folded in at speed, the noise disappears completely. I had it to the dealer, who couldn't pinpoint it, and I was trying to blame it on the tires, but found this instead.
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2003 Jetta station wagon, disc brakes all around.
Recently changed all 4 pads + the rear rotors. about 2 weeks after this the car started making a horrible noise from the rear driver side wheel- like the tires were dragging metal.
We took off the wheel last night, replaced the caliper, and discovered one caliper bolt was missing. We think this caused the caliper to misplace itself and start riding the rotor. The caliper was also in pretty bad shape so we went ahead and replaced it because we had already bought the part.
Anyway, we put everything together, drove it last night a short distance, everything was fine.
Today after driving apx. 25 miles since the replacement, the car has started whistling. I'm not sure where the noise is coming from, but it only happens at higher speeds, and I don't know if turning affects it but it happens going straight. It is a cyclical type of sound and goes away when braking.
Note: when replacing the caliper, my dad did not use the little metal brackets because we couldn't figure out how to place them and didn't think we needed them. Would that cause this noise? Is that dangerous to do?
UPDATE: I've mislead you all! Upon further inspection the whistling noise is coming from the serpentine belt area. I had assumed that it was coming from the wheel because we had JUST messed with it, but I was wrong. Now I'm wondering what's going on with the belt!
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My 2005 Ford Freestar with 164k miles experiences a high pitched whistling noise coming from the front end after a few minutes of highway speed driving. It sounds like a tea kettle whistle. It starts out as a quick pulsed whistle then moves to a solid whistling noise. I've heard it driving straight and turning. The sound pulsates if I turn the steering wheel slightly to the left or right but seems to occur more when I turn right. The sound does not occur if van is not in motion and will stop just before car comes to rest at a stop. Three repair shops have looked at this and none of them can replicate the sound while van is on a lift but one shop did hear it during a test drive. All three shops have been unable to locate / diagnose this whistling noise. They all state brakes are in very good shape.
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My truck started making this whistling sound a few thousand miles ago. Its a high pitched squeal coming from somewhere under the hood. There doesn't seem to be any pattern or certain time when it does it. Ive read on here about an alternator problem on these trucks. Or could it be my S&B intake?
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3 months ago, my 2003 C240 Mercedes made a high pitched whine and would not accelerate more than 15 miles per hour and if I did go faster the whine got louder and higher in pitch. I took it to the local “foreign car” auto shop (I have had the car serviced there in the past) and they replaced what I believe that said was a “contact plate” something that controls the transmission is what I think I remember. Yesterday (just 3 months later) the exact same issue is occurring. Again I had it towed back to the auto shop and now they tell me the transmission is shot and they will need to replace it. They added it has nothing to do with the plate they replaced/installed 3month ago and they will give me a credit on the plate that installed 3 months ago. Are they correct?
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I'm have a 2011 6.7, 180,000. I have noticed a high pitched whistle, not an turbo whine, that disappears after the boost drops to less that the first mark on the gauge 5-10psi??? It stays consistent in tone, the mileage is good, power is good normal 6.7!!.
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When i turn my car in the morning it whistles very loudly then after it warms up for about a min or so the noise goes away..
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Yesterday, I noticed a rattling sound coming from the entire car a 2002 subaru outback 2.5l 4 cylander (it seems a bit louder on the passenger side but it literally can be heard throughout the car). I was on the expressway and got off and stopped at a red light when the check engine light came on and started to flash and the rpm's dropped rapidly and the needle began to bounce up and down. I pulled into a gas station to check it out more and popped the hood to find that when the car is rattling it is also shaking and rocking the engine of the car from side to side slightly.
When I'm idling the rpm's drop and the car feels like it is going to stall out. Then, as I accelerate, the rpm's barely go above 2000 and jump up quickly between 3000 & 4000. It sounds like a metal on metal rattle with a very slight high pitched whistle and you can hear a fan kick on and the engine try to keep the rpm's up every couple of seconds when the car is stopped. I had the timing belts replaced 2 years ago and it sounds very similar to how it did when they needed to be changed, however, the engine never felt like it was going to stall until yesterday.
When idling the noise gets louder and when accelerating it can still be heard but barely. Also, the rattling has caused the entire car to vibrate all of the time. I noticed yesterday that the oil was low and topped it off, but I don't think that would cause such a hige issue so quickly. When I go uphill, i have a good amount of power but every 30 second or so the car shifts and the rpm's jump lurching the car forward because of the surge of power. Also, when I hit the brakes, my rpm's jump slightly to about halfway above the 1 but the engine does not accelerate.
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I have a 2002 B5.5 Passat sedan. 140K.
Inside my passat, when I run my heater on #1 speed setting there is a high pitched squeak but it goes away on the #2 speed setting. It hasn't been a constant annoyance but enough to want me to fix it now. [URL]....................
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I just noticed after I turn the car off the noise that is usually a hum is now a very high pitched noise, until that motor turns off.
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I have a 2007 Camry with 90k miles. All of a sudden today when I turned my car on I noticed a high pitched whirling noise, similar to a tornado siren that gets louder as I accelerated in my parking garage. Even when I turned the car off and on and it sat in park I still noticed it and it got louder as I press on the accelerator. I haven't driven over 20 mph since I noticed this so I'm not sure if it still does it at fast speeds.
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While driving home tonight in the snow, about half away home I noticed the most god awful high pitched squeal sound coming from what sounded like the back passenger side of the car. The squeal was so loud it made me cringe. I couldn't really get any near 40 mph because I could hear it start and instantly it would become really loud and would only stop when I slow down almost completely and then maintain a speed around 30 mph. It's pitch black out so I couldn't conduct a real thorough inspection however a quick look over and I didn't see anything wrong.
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My girlfriend has a 2001 Ford Escape 3L, 6cyl. When accelerating there is a loud high pitch whistle/whirling sound. The sound varies with the amount of throttle you give it. More throttle = louder whine. Doesn't seem to do it when idling or coasting. What that could be? I'm about to remove the belt and take a look at the drive belt tensioner and other pulleys.
Just checked pulleys and tensioner and the tensioner seems fine, a/c pulley spins smooth and free no play, alternator spins smooth no play. The belt needs to be replaced. I wouldn't think this would cause such a load whistle under acceleration. I would expect it to do it all the time if it was the belt. I'm looking at the water pump pulley and belt too and they seem ok as well.
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This is kind of an odd ball problem since I have not encountered this before, but every time I turn my wheels full left or full right and start moving a really high pitched squeaking sound comes from the front of the car. Is it bad alignment or wear sensors on the brake pads rubbing? the brakes have a lot of pad left so i find that hard to believe.
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I have had my gen3 Prius for two and a half years and have covered 65,000 miles.
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Last night around 1:00, I was awakened by a noise I think was coming from my car parked below my window. It was plugged in at the time. I heard a loud, high pitched whine, followed by a couple of knocks or thumps, then a sound like R2D2 makes when he turns his head, then a couple more knocks, and another R2D2 noise. I think I may also have seen lights flashing around the the edges of my blackout blinds, but am not sure, since I had just been sound asleep.
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I have been getting a loud, high-pitched mechanical-sounding noise coming from the middle of the dash, near the CD player. It lasts only a few seconds, but it scares the sh!t out of me every time! It happens out of the blue after I've been driving for a few minutes about every 3 weeks or so. The sound is almost impossible to describe...but if you've had it happen you probably know exactly what I'm talking about. It happened today while I was listening to a CD, so I can't imagine it's the player that's doing it. Non-Nav/Air V8
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