High Pitched Whine - Hard Acceleration
02-17-2016, 04:43 AM
#1
Senior Member
Thread Starter
High Pitched Whine - Hard Acceleration
Hi,
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
Last edited by Cozy; 02-17-2016 at 08:18 AM.
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cskalski (08-19-2021)
02-17-2016, 07:42 AM
#3
Senior Member
Thread Starter
08-02-2018, 04:40 PM
#4
Hi,
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
I have the exact same issues with my car. Were you able to figure what the problem was? I have a 2012 c350 4matic.
08-02-2018, 05:34 PM
#5
Senior Member
Thread Starter
If yours is as inconsistent as mine was and not causing any issues then I wouldn’t worry. Perhaps just check your pulleys and see if there’s any crud around there or if the car has been sat a while, perhaps things are just a little dry. Maybe try some penetrating oil such as WD40 to lube things up.
08-05-2018, 12:39 PM
#7
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Join Date: Sep 2016
Location: Orange County, CA
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C63 AMG - LSD
Mine does the same thing, I actually caught the sound last night on my Gopro. My son likes to go fast through overpasses so when we did last night you could really hear the whine. video:
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08-06-2018, 01:26 PM
#8
Senior Member
Thread Starter
Mine does the same thing, I actually caught the sound last night on my Gopro. My son likes to go fast through overpasses so when we did last night you could really hear the whine. video:
https://youtu.be/eQswJHNjtm0
https://youtu.be/eQswJHNjtm0
08-06-2018, 02:03 PM
#9
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2012 C63 P31 Sedan
FYI, sometimes alternator whine can sound very similar, especially if the noise makes it through the audio system. Alternator speed is directly tied to engine speed, which will cause the pitch to change with engine speed.
Just another area to check, besides those stated previously.
Just another area to check, besides those stated previously.
08-06-2018, 03:54 PM
#10
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C63 AMG - LSD
It's in the list of replacement stuff. In the past year I replaced transmission, torque converter & engine mounts. Getting tired of spending money on it haha. But I don't drive it much at least. I'll probably do both in the next month or two.
12-29-2018, 06:42 PM
#11
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2012 P31 C63
Didn’t want to make a new thread but this is happening to my car also and I just bought it a week ago with 31k miles. I’ll take to MB and see what they say.
08-11-2019, 03:07 PM
#12
Senior Member
The 'pitch' of the whine is too low to be alternator. It could be a belt vibrating on a worn / misaligned/ dirty pulley. It also does not sound like an 'oil starvation' oil pump or a vacuum leak--those do not change with RPM much. I suspect turbulence-eddy shedding in the intake air ducts.
04-02-2020, 04:14 AM
#14
04-02-2020, 05:29 PM
#15
Member
I have hint of one as well but know it's my power steering more than likely as it's a more common issue. Might wanna look there to see how it's doing.
I few hard runs and I hear it more for a couple days as it gets air back out of the pump line from high rpm runs. you can check to see if you see air bubbles in power steering res. kind of back feeding in.
I few hard runs and I hear it more for a couple days as it gets air back out of the pump line from high rpm runs. you can check to see if you see air bubbles in power steering res. kind of back feeding in.
08-19-2021, 12:58 AM
#17
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2020 Camaro R/S SC (supercharged V6)
Motor mount?
Hi,
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
08-19-2021, 07:44 AM
#18
I think there was a thread on here I remember with a similar ask. Someone said it could be a wheel bearing. Mine has made the sound a few times over the years but I haven't heard it in a long time.
09-01-2021, 11:14 PM
#19
Junior Member
Hi,
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
Hopefully someone can help me work this out.
On occasion when I accelerate hard in gear and rolling (say 3k plus), the engine will make a high pitched whine that is consistent in pitch with engine revs. The best way to describe it is that it sounds (sort of) like a supercharger but, unfortunately I don't have one. The only common thing I feel that each occurrence has is that the car has normally been run for a while and is pretty hot, albeit normal engine oil temps. That said, the first time that I noticed this it was during powering-out of a tight left hand bend and I assumed perhaps that it was due to the engine moving slightly perhaps and a pulley/belt making the noise; as it was a new thing is not heard before in the 12mths previous. I believe that each time it has done this has been after sharp direction changes but I might be wrong, I'm usually paying solid attention to the car's behaviour and my surroundings.
It's not common, I can count on one hand how many times it has occurred over the last 12mths, but I am intrigued for sure.
MB really aren't interested, they say some whining is normal and, of course when I pick up a tech to have him listen, it won't do it as it happens only rarely.
No change to performance, general engine noise, transmission shift time, transmission performance (no clunks or anything bad). Sometimes the car does "feel" slower but it's unrelated to this noise, only when the car has been running a while and speedo tells a different story so, I think my butt dyno is broken.
Car is 2013 non-PP coupe.
Any clues?
