Whistle sound from left engine side when letting off accelerator
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Posts: 1,227
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From: Chicago
E63 SL55 996TT C5Z06
Whistle sound from left engine side when letting off accelerator
anyone experience a whistle sound like this from the engine left side?
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
Super Member
Joined: Aug 2014
Posts: 636
Likes: 19
C32 amg
anyone experience a whistle sound like this from the engine left side?
C32 AMG - whistle sound from left engine side - YouTube
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
C32 AMG - whistle sound from left engine side - YouTube
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,227
Likes: 185
From: Chicago
E63 SL55 996TT C5Z06
Morphh - think youre right on the vacuum leak...the hoses are all connected to the breather box as far as i can see.
i attempted to gently tighten the bolts on the breather box thinking perhaps it was slightly loose and found that the rear smaller torx bolt was not only super loose but is snapped (see pic) and just stuck in the slot held in with with black sealer.
I checked the other smaller front torx bolt on the breather box and unscrewed it to do a sanity check on the length and that one is about 1 inch long so clearly the other one was broken which you can see from the pic attached.
i pressed in a small strip of aluminum HVAC tape on the bolt and slot to hold the broken bolt in while i drive it to the shop and the whistling sound is much less, but still noticeable so am guessing thats the culprit.
thx Morphh once again you have been tremendous help!
i attempted to gently tighten the bolts on the breather box thinking perhaps it was slightly loose and found that the rear smaller torx bolt was not only super loose but is snapped (see pic) and just stuck in the slot held in with with black sealer.
I checked the other smaller front torx bolt on the breather box and unscrewed it to do a sanity check on the length and that one is about 1 inch long so clearly the other one was broken which you can see from the pic attached.
i pressed in a small strip of aluminum HVAC tape on the bolt and slot to hold the broken bolt in while i drive it to the shop and the whistling sound is much less, but still noticeable so am guessing thats the culprit.
thx Morphh once again you have been tremendous help!
Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,227
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From: Chicago
E63 SL55 996TT C5Z06
the shop confirmed my whistle noise is a vacuum leak coming from the where the intake manifold pipe connects with a rubber hose/clamps to the lower Y-Pipe.
they said those rubber hoses that connect that manifold pipe to the y-pipe are pretty degraded (see pics) so not sealing properly... the sound went away for about 2 days after they tightened the clamp on the hose but is back.
can these be re-sealed or do you just buy new rubber hoses???
If new, what is the part number for those hoses??? I cant seem to find so maybe it only comes with a new intake manifold or new lower y-pipe which i cannot deterime from those parts so may call dealer...
http://www.mboemparts.com/oe-mercedes-benz/1120900031
http://www.mboemparts.com/oe-mercedes-benz/1120980207
they said those rubber hoses that connect that manifold pipe to the y-pipe are pretty degraded (see pics) so not sealing properly... the sound went away for about 2 days after they tightened the clamp on the hose but is back.
can these be re-sealed or do you just buy new rubber hoses???
If new, what is the part number for those hoses??? I cant seem to find so maybe it only comes with a new intake manifold or new lower y-pipe which i cannot deterime from those parts so may call dealer...
http://www.mboemparts.com/oe-mercedes-benz/1120900031
http://www.mboemparts.com/oe-mercedes-benz/1120980207
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Joined: Aug 2014
Posts: 636
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C32 amg
the shop confirmed my whistle noise is a vacuum leak coming from the where the intake manifold pipe connects with a rubber hose/clamps to the lower Y-Pipe.
they said those rubber hoses that connect that manifold pipe to the y-pipe are pretty degraded (see pics) so not sealing properly... the sound went away for about 2 days after they tightened the clamp on the hose but is back.
can these be re-sealed or do you just buy new rubber hoses???
If new, what is the part number for those hoses??? I cant seem to find so maybe it only comes with a new intake manifold or new lower y-pipe which i cannot deterime from those parts so may call dealer...
http://www.mboemparts.com/oe-mercedes-benz/1120900031
http://www.mboemparts.com/oe-mercedes-benz/1120980207
they said those rubber hoses that connect that manifold pipe to the y-pipe are pretty degraded (see pics) so not sealing properly... the sound went away for about 2 days after they tightened the clamp on the hose but is back.
can these be re-sealed or do you just buy new rubber hoses???
If new, what is the part number for those hoses??? I cant seem to find so maybe it only comes with a new intake manifold or new lower y-pipe which i cannot deterime from those parts so may call dealer...
http://www.mboemparts.com/oe-mercedes-benz/1120900031
http://www.mboemparts.com/oe-mercedes-benz/1120980207
Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,227
Likes: 185
From: Chicago
E63 SL55 996TT C5Z06
i removed my intake y-pipe and could see a little more back there, but might need to remove the throttle body to get a good look at what you're referring to with those PCV hoses/connect as this noise is driving me nuts
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C32 amg
Morphh - i will take a look at that thanks. what do those 2 PCV hoses (or whatever they are) look like that connect underneath the throttle body? am trying to find them but cant tell from pics of that area (attached from different site) what those look like to check out.
i removed my intake y-pipe and could see a little more back there, but might need to remove the throttle body to get a good look at what you're referring to with those PCV hoses/connect as this noise is driving me nuts
i removed my intake y-pipe and could see a little more back there, but might need to remove the throttle body to get a good look at what you're referring to with those PCV hoses/connect as this noise is driving me nuts
the intakes, both PCV pipes come together T and our plug
In under the throttle body. U can't see with that pic u have look up catch can from needswing I think there is diagram there on how it connects
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Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,227
Likes: 185
From: Chicago
E63 SL55 996TT C5Z06
the shop confirmed my whistle noise is a vacuum leak coming from the where the intake manifold pipe connects with a rubber hose/clamps to the lower Y-Pipe.
they said those rubber hoses that connect that manifold pipe to the y-pipe are pretty degraded (see pics) so not sealing properly... the sound went away for about 2 days after they tightened the clamp on the hose but is back.
can these be re-sealed or do you just buy new rubber hoses???
If new, what is the part number for those hoses??? I cant seem to find so maybe it only comes with a new intake manifold or new lower y-pipe which i cannot deterime from those parts so may call dealer...
http://www.mboemparts.com/oe-mercedes-benz/1120900031
http://www.mboemparts.com/oe-mercedes-benz/1120980207
they said those rubber hoses that connect that manifold pipe to the y-pipe are pretty degraded (see pics) so not sealing properly... the sound went away for about 2 days after they tightened the clamp on the hose but is back.
can these be re-sealed or do you just buy new rubber hoses???
If new, what is the part number for those hoses??? I cant seem to find so maybe it only comes with a new intake manifold or new lower y-pipe which i cannot deterime from those parts so may call dealer...
http://www.mboemparts.com/oe-mercedes-benz/1120900031
http://www.mboemparts.com/oe-mercedes-benz/1120980207
in case anyone else has this issue, here's a good diagram of the parts for that entire area....
http://www.mbpartsworld.com/p/__/HOS...120942282.html
http://www.mbpartsworld.com/showAsse...sembly=1076716
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Joined: Aug 2014
Posts: 636
Likes: 19
C32 amg
Think i found the correct hose part number.... this is for the one that connects the intake manifold to the lower Y pipe in the back of the supercharger is #1120942282. May just buy 2 of these get my cracked/deteriorated ones replaced and see if that stops this whistle noise......
in case anyone else has this issue, here's a good diagram of the parts for that entire area....
http://www.mbpartsworld.com/p/__/HOS...120942282.html
http://www.mbpartsworld.com/showAsse...sembly=1076716
in case anyone else has this issue, here's a good diagram of the parts for that entire area....
http://www.mbpartsworld.com/p/__/HOS...120942282.html
http://www.mbpartsworld.com/showAsse...sembly=1076716
Super Member
Joined: Aug 2014
Posts: 636
Likes: 19
C32 amg
Think i found the correct hose part number.... this is for the one that connects the intake manifold to the lower Y pipe in the back of the supercharger is #1120942282. May just buy 2 of these get my cracked/deteriorated ones replaced and see if that stops this whistle noise......
in case anyone else has this issue, here's a good diagram of the parts for that entire area....
http://www.mbpartsworld.com/p/__/HOS...120942282.html
http://www.mbpartsworld.com/showAsse...sembly=1076716
in case anyone else has this issue, here's a good diagram of the parts for that entire area....
http://www.mbpartsworld.com/p/__/HOS...120942282.html
http://www.mbpartsworld.com/showAsse...sembly=1076716
Super Member
Joined: Aug 2014
Posts: 636
Likes: 19
C32 amg
I ask u question abt belt tensioner? U notice a noise cmg from brand new one, I put new one on and it's making a rattling noise when in gear.
Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,227
Likes: 185
From: Chicago
E63 SL55 996TT C5Z06
Morphhh - heres a video of my new belt tensioner which i installed an didnt havey any issues with regarding noise or vibration.
ttps://www.youtube.com/watch?v=dgI7YLR_YGI
With that said, the old tensioner here which is the original 13 year old definitely had some wobble/movement but seems some level of movement is normal compared to the new one so not sure exactly what benefit the new tensioner provided but for 150 bucks and couple hours of my time was worth replacing
ttps://www.youtube.com/watch?v=dgI7YLR_YGI
With that said, the old tensioner here which is the original 13 year old definitely had some wobble/movement but seems some level of movement is normal compared to the new one so not sure exactly what benefit the new tensioner provided but for 150 bucks and couple hours of my time was worth replacing
Super Member
Joined: Aug 2014
Posts: 636
Likes: 19
C32 amg
Morphhh - heres a video of my new belt tensioner which i installed an didnt havey any issues with regarding noise or vibration.
ttps://www.youtube.com/watch?v=dgI7YLR_YGI
With that said, the old tensioner here which is the original 13 year old definitely had some wobble/movement but seems some level of movement is normal compared to the new one so not sure exactly what benefit the new tensioner provided but for 150 bucks and couple hours of my time was worth replacing
C32 AMG Belt tensioner NEW no wobble - YouTube
ttps://www.youtube.com/watch?v=dgI7YLR_YGI
With that said, the old tensioner here which is the original 13 year old definitely had some wobble/movement but seems some level of movement is normal compared to the new one so not sure exactly what benefit the new tensioner provided but for 150 bucks and couple hours of my time was worth replacing
C32 AMG Belt tensioner NEW no wobble - YouTube
Newbie
Joined: May 2017
Posts: 2
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Sl 500 m113
anyone experience a whistle sound like this from the engine left side?
C32 AMG - whistle sound from left engine side - YouTube
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
C32 AMG - whistle sound from left engine side - YouTube
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
Andy
Newbie
Joined: May 2017
Posts: 2
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Sl 500 m113
anyone experience a whistle sound like this from the engine left side?
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
its a whistle type noise coming from the left side which i hear at idle and the noise increases if i tap the accelerator pedal (see video).
BUT when driving it goes away if i am accelerating and am on the accelerator pedal but it then comes back when i am coasting/not touching the accelerator pedal.
i slipped off my belt to check if it was a bad bearing on the water pump or alternator and also checked all the other pullies and they all spin fine zero noise so assuming its not a bad bearing.
could it be a leak of some sort??? i dont have any performance issues or any CEL's just this noise happening for about 2 weeks and has progressively gotten louder so getting me worried..... car is going to the shop next week maybe time for a compression test or something.
thx john
Super Member
Joined: Aug 2014
Posts: 636
Likes: 19
C32 amg
Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,227
Likes: 185
From: Chicago
E63 SL55 996TT C5Z06
was the two hoses that connect the intake manifold to the lower y pipe thats behind the supercharger - see my other post here with the part #1120942282. my hoses were both dry/cracked and after replacing the whistle sound was gone. good luck
its the hose labeled #690 on the diagram here from mbpartsworld
http://www.mbpartsworld.com/p/Merced...120942282.html
http://www.mbpartsworld.com/p/__/HOS...120942282.html
http://www.mbpartsworld.com/showAsse...sembly=1076716
its the hose labeled #690 on the diagram here from mbpartsworld
http://www.mbpartsworld.com/p/Merced...120942282.html
http://www.mbpartsworld.com/p/__/HOS...120942282.html
http://www.mbpartsworld.com/showAsse...sembly=1076716
