High Pitched Whine - Hard Acceleration
Thread Starter
Senior Member
Joined: Sep 2014
Posts: 284
Likes: 103
C63
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; Feb 17, 2016 at 08:18 AM.
Thread Starter
Senior Member
Joined: Sep 2014
Posts: 284
Likes: 103
C63
Newbie
Joined: Aug 2018
Posts: 3
Likes: 0
Mercedes c350
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.
Thread Starter
Senior Member
Joined: Sep 2014
Posts: 284
Likes: 103
C63
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.
Super Member
Joined: Sep 2016
Posts: 723
Likes: 100
From: Orange County, CA
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:
Thread Starter
Senior Member
Joined: Sep 2014
Posts: 284
Likes: 103
C63
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
Trending Topics
Senior Member
Joined: Jan 2018
Posts: 415
Likes: 109
From: Whitehouse Station, NJ
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.
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Super Member
Joined: Sep 2016
Posts: 723
Likes: 100
From: Orange County, CA
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.
Senior Member
Joined: Apr 2019
Posts: 428
Likes: 96
From: Houston
001 s600, 94 sl600
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.
Junior Member
Joined: Nov 2016
Posts: 21
Likes: 0
2013 c63
Member
Joined: May 2017
Posts: 242
Likes: 48
From: West by god Virginia
'08 C300 4Matic Sport / '11 C63
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.
Newbie
Joined: Aug 2021
Posts: 4
Likes: 0
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?
Junior Member
Joined: Oct 2018
Posts: 26
Likes: 3
2013 c63 amg coupe p31
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?
