Jun 24, 2015, 01:21 PM
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Belt/pulley squeak at start up ...
Thread Starter
Senior Member
Joined: Apr 2009
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CLS55 AMG 030
It's not a squeal on mine. It's a persistent whistling/chirping for the first few minutes. Once warm, it goes away, same as before. I'll take it in again in the spring for them to try again. Right now she's in storage.
Thread Starter
Senior Member
Joined: Apr 2009
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CLS55 AMG 030
I assume the dealer did. It was under warranty. To be honest though, the noise with the hood up was VERY localized. It was very easy to hear where it was coming from. Top right front of the motor. And that pulley and tensioner along with a new belt were part of their work.
MBWorld Fanatic!
Joined: Feb 2007
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From: Phoenix by way of Texas
2003 E55 AMG
watching the video it sounds like a pulley. they have something called belt dressing. for squeaky belts , better than carb cleaner. spray the belt lightly if it quits then its a belt. this stuff does last a while on the belt but it will return. if no change in sound then likely pulley , common is the tension pulley as others have mentioned. keep us updated. I to would be curious of the cost.
Member
Joined: Sep 2005
Posts: 224
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From: Cary, IL
2003 CL55 Kompressor Horizon Blue Metallic
That's one of the things I had replaced. And after the work was done, it was very quiet on start up for a couple thousand miles.
It's not a squeal on mine. It's a persistent whistling/chirping for the first few minutes. Once warm, it goes away, same as before. I'll take it in again in the spring for them to try again. Right now she's in storage.
It's not a squeal on mine. It's a persistent whistling/chirping for the first few minutes. Once warm, it goes away, same as before. I'll take it in again in the spring for them to try again. Right now she's in storage.
The problem was that the sleave was slipping against the boss on the block and the centering plate. The dead giveaway is to remove the bolt and see if the sleave and centering plate have shiny wear marks from moving around. The movement is what was causing all the noise.
Fresh belts would temporarily fix the problem, that changes the load on the idler and how freely the pulley is moving around the sleave. But, the sound would eventually come back.
Last edited by mclarenm8d; Feb 24, 2010 at 08:44 PM.
Junior Member
Joined: Apr 2010
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2014 E 550 Cabriolet. Black exterior with red interior, 2009 C 350. 2013 Toyota highlander.
Hi, my 2009 C350 started making this noise the day i got it serviced. Its a whistling/chirping noise, comes on on the first start of the day or when the car is cold, lasts about 8 minutes. Very annoying but then disappears after the first 8 minutes. took my car to the dealers but since the noise wasnt there they couldnt do anything about it, gave a basic look at the engine and said everything is fine, which ofcourse it isint.
Any one have any ideas what this noise could be. My car has done around 22000 miles on it and had no problem till this crap. here is the link below to the sound i recorded from my cell. Any help will be appreciated. Thanks !
http://www.youtube.com/watch?v=LUzdaMoLSb8
http://www.youtube.com/watch?v=3Cr_iHFMj1U
Any one have any ideas what this noise could be. My car has done around 22000 miles on it and had no problem till this crap. here is the link below to the sound i recorded from my cell. Any help will be appreciated. Thanks !
http://www.youtube.com/watch?v=LUzdaMoLSb8
http://www.youtube.com/watch?v=3Cr_iHFMj1U
Junior Member
Joined: Jan 2010
Posts: 21
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From: Columbus, OH
2004 E55 AMG
To add - I had a similar sound, and also check the belt tension itself. Should be pretty solidly on there, I think deflection is less that 10 mil. My tensioner was shot causing squeal and a rattle, and a scary loose belt. I had a local Benz guy do it for about 500 total with new belts. Chirps are normal from supercharger clutch, and sound exactly like a belt squeak...
Junior Member
Joined: Apr 2010
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2014 E 550 Cabriolet. Black exterior with red interior, 2009 C 350. 2013 Toyota highlander.
I am sorry, but i am unfortunately a doc and have no idea about the super charger or anything you wrote ....... are you telling me the dealers wont be able to fix it as they cannot hear it. i plan to drop my car at the dealers tomorrow. with the hope they can hear it in the morning when they start. the problem is the sounds only lasts around 8 mins and after that it disappear. Did your sound last this long as well ? and what did you get changed.
Sorry for asking you to repeat yourself in lay mans english
Sorry for asking you to repeat yourself in lay mans english
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Junior Member
Joined: Jan 2010
Posts: 21
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From: Columbus, OH
2004 E55 AMG
Hey no worries - the supercharger is a big pump-like device that sits on top of the engine, to pressurize air as it enters into the engine. It is belt driven (unlike a turbocharger which is exhaust driven). So, in our case, it has a clutch on it that "activates" when you step on the gas, putting load on the belt, causing a squeak-like chirp.
My particular problem was within the tensioner - the device that puts enough tension on the belt to keep things moving - supercharger, alternator, steering, etc. Loose tensioner in my case caused a rattle (from worn bearings) and a constant squeak until it was warmed up (things expand and change when hot). Yes, my dealer said that "nothing was wrong" too - probably best for them to keep it overnight and check when cold. My tensioner and belts were replaced.
Also, ask this community for dealers in your area - potentially find one that is better than another. Or even a local shop that specializes...
My particular problem was within the tensioner - the device that puts enough tension on the belt to keep things moving - supercharger, alternator, steering, etc. Loose tensioner in my case caused a rattle (from worn bearings) and a constant squeak until it was warmed up (things expand and change when hot). Yes, my dealer said that "nothing was wrong" too - probably best for them to keep it overnight and check when cold. My tensioner and belts were replaced.
Also, ask this community for dealers in your area - potentially find one that is better than another. Or even a local shop that specializes...
Junior Member
Joined: Apr 2010
Posts: 33
Likes: 0
2014 E 550 Cabriolet. Black exterior with red interior, 2009 C 350. 2013 Toyota highlander.
Hey no worries - the supercharger is a big pump-like device that sits on top of the engine, to pressurize air as it enters into the engine. It is belt driven (unlike a turbocharger which is exhaust driven). So, in our case, it has a clutch on it that "activates" when you step on the gas, putting load on the belt, causing a squeak-like chirp.
My particular problem was within the tensioner - the device that puts enough tension on the belt to keep things moving - supercharger, alternator, steering, etc. Loose tensioner in my case caused a rattle (from worn bearings) and a constant squeak until it was warmed up (things expand and change when hot). Yes, my dealer said that "nothing was wrong" too - probably best for them to keep it overnight and check when cold. My tensioner and belts were replaced.
Also, ask this community for dealers in your area - potentially find one that is better than another. Or even a local shop that specializes...
My particular problem was within the tensioner - the device that puts enough tension on the belt to keep things moving - supercharger, alternator, steering, etc. Loose tensioner in my case caused a rattle (from worn bearings) and a constant squeak until it was warmed up (things expand and change when hot). Yes, my dealer said that "nothing was wrong" too - probably best for them to keep it overnight and check when cold. My tensioner and belts were replaced.
Also, ask this community for dealers in your area - potentially find one that is better than another. Or even a local shop that specializes...
Did you listen to the sound i put on youtube ? did yours sound the same.....
Thanks again tho. very kind of you to reply twice and in detail.
Junior Member
Joined: Jan 2010
Posts: 21
Likes: 0
From: Columbus, OH
2004 E55 AMG
Well we have two very different engines as well - the C350 is a V6 and the E55 is a V8. So, sounds are not the same either. Yours could very well be something easy...also, check the other boards too, there might be some more info out there...
Junior Member
Joined: Apr 2010
Posts: 33
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2014 E 550 Cabriolet. Black exterior with red interior, 2009 C 350. 2013 Toyota highlander.
Very True, Thanks for all your input. It will be resolved soon, i am sure, otherwise there is always the option to call it a lemon :@)
Thanks again
Thanks again
Super Member
Joined: Sep 2009
Posts: 941
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From: Orlando FL
a unicorn tuned p30 e63
Hello all,
I recently started to get a squeaky sound from the engine bay, so i got smart and decided to take off the SC belt to see if it was the tensioner or the idler pulley and when i took off the belt it stopped making the noise. I suspect its the idler pulley because it has some play in it, is this usualy the issue?
I recently started to get a squeaky sound from the engine bay, so i got smart and decided to take off the SC belt to see if it was the tensioner or the idler pulley and when i took off the belt it stopped making the noise. I suspect its the idler pulley because it has some play in it, is this usualy the issue?
Newbie
Joined: Aug 2010
Posts: 6
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From: Mobile, AL
2006 E55
Mine does that too but it's the belt. Getting it replaced next week. If you take a candle and lightly touch it to the underside of the belt with the engine running, to lightly coat it, and it stops the noise then I'm told it's the belt. I did it to mine and it stopped it for several weeks.
MBWorld Fanatic!
Joined: Sep 2009
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From: LA
W213 E63
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Joined: Oct 2009
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From: Southern California
E55 w/ goods, Z32 Project underway
As someone else pointed out, if it only happens when cold, and you spray either belt dressing or brake cleaner on the belt and the noise goes away temporarily, it is the belt. I bought a new belt for $6.xx and a new blower belt, no noise. Could also be a weak tensioner as many of these cars are getting up in the miles. If once you spray on the belt, the noise does not change significantly, it is more than likely a bearing.
Junior Member
Joined: Apr 2010
Posts: 33
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2014 E 550 Cabriolet. Black exterior with red interior, 2009 C 350. 2013 Toyota highlander.
Did u get it serviced as well ?
did u look at the videos i posted, does ur sound the same ..... perhaps waiting it out a few days may help, i know the sound is horrible and embarrassing.
Junior Member
Joined: Jan 2013
Posts: 58
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From: Danbury, CT
2006 Mercedes benz E55
Newbie
Joined: Jan 2016
Posts: 1
Likes: 0
Mercedes Benz Ml 350 2006
Squeaking engine noise on ML 350
I also have the same problem. Mercedes Benz ML 350 2006. I bought the car and i noticed the squeaking sound the next day. I have been going to Mercedes Benz of Reno Nevada for two months and I cant get help. (bcz the car was under warranty.... they have been delaying for the warranty to run out which did on 24th of Dec.) Am going back to pick the same issue with them because it started when the car had warranty and they even attempted many times to fix it.
the noise can be heard from this videos
Am suspecting the pulleys . I will post updated after solving the problem
the noise can be heard from this videos
Am suspecting the pulleys . I will post updated after solving the problem
Member
Joined: Aug 2016
Posts: 158
Likes: 4
From: Seattle
2019 GLC300 4matic, 2019 C300 4matic, 2018 C300 4matic, 2009 C300 Flex, 2004 C230 Kompressor
Hi, my 2009 C350 started making this noise the day i got it serviced. Its a whistling/chirping noise, comes on on the first start of the day or when the car is cold, lasts about 8 minutes. Very annoying but then disappears after the first 8 minutes. took my car to the dealers but since the noise wasnt there they couldnt do anything about it, gave a basic look at the engine and said everything is fine, which ofcourse it isint.
Any one have any ideas what this noise could be. My car has done around 22000 miles on it and had no problem till this crap. here is the link below to the sound i recorded from my cell. Any help will be appreciated. Thanks !
http://www.youtube.com/watch?v=LUzdaMoLSb8
http://www.youtube.com/watch?v=3Cr_iHFMj1U
Any one have any ideas what this noise could be. My car has done around 22000 miles on it and had no problem till this crap. here is the link below to the sound i recorded from my cell. Any help will be appreciated. Thanks !
http://www.youtube.com/watch?v=LUzdaMoLSb8
http://www.youtube.com/watch?v=3Cr_iHFMj1U
Newbie
Joined: Jul 2022
Posts: 1
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Mercedes E class C class GLK class
