W204 Engine Noise, Serpentine Belt or Pulley?
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Joined: Sep 2008
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From: CA
08' C300
W204 Engine Noise, Serpentine Belt or Pulley?
Trying to figure out what's causing the high pitch noise in the video. It only happens at idle when the engine is warm, goes away at higher rpms. It seems like it's coming from one of the pulleys, but I'm not sure which one. Has anyone had a similar issue?
The car is a 2008 W204 C300 4Matic with 20k miles.
The car is a 2008 W204 C300 4Matic with 20k miles.
Junior Member
Joined: Feb 2007
Posts: 20
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From: Santa Cruz, CA; I'm a temporary transplant from Oklahoma, by way of Saudi Arabia (awful!)
2006 CLK350 Cab
Trying to figure out what's causing the high pitch noise in the video. It only happens at idle when the engine is warm, goes away at higher rpms. It seems like it's coming from one of the pulleys, but I'm not sure which one. Has anyone had a similar issue?
The car is a 2008 W204 C300 4Matic with 20k miles.
http://www.youtube.com/watch?v=UERMCmr0HgU
The car is a 2008 W204 C300 4Matic with 20k miles.
http://www.youtube.com/watch?v=UERMCmr0HgU
Member
Joined: Sep 2012
Posts: 87
Likes: 0
1999 C43 AMG
Trying to figure out what's causing the high pitch noise in the video. It only happens at idle when the engine is warm, goes away at higher rpms. It seems like it's coming from one of the pulleys, but I'm not sure which one. Has anyone had a similar issue?
The car is a 2008 W204 C300 4Matic with 20k miles.
http://www.youtube.com/watch?v=UERMCmr0HgU
The car is a 2008 W204 C300 4Matic with 20k miles.
http://www.youtube.com/watch?v=UERMCmr0HgU
Member
Joined: Sep 2012
Posts: 87
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1999 C43 AMG
Originally Posted by khw8298
Replace upper idler pully
Posted from Mbworld.org App for Android
MBWorld Fanatic!
Joined: Jun 2005
Posts: 1,511
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From: Chicago
2025 AMG E 53; 2018 GLC300 4Matic; 2003 360 Modena
Good to know. I have the noise occasionally on my '10 and was going to change the idler pulley. Tensioner it is then...
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Junior Member
Joined: Oct 2012
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C300
This has been helpful but I had one more additional question. Has anyone used the Gates Belt Tensioner part #38319 ??? Trying to decide to either try this or go with the Ina part #2722000270. Just trying to see if anyone had problems with the Gates one or not or are they the same part.
Last edited by nnkfws333; Oct 15, 2013 at 01:38 AM.
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Junior Member
Joined: Oct 2012
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C300
Well I got the Gates tensioner off of Amazon,
, and it didn't work for my 2009 W204 C300 Sport 6 Speed Manual. On the back of the tensioner, where the shock absorber attaches, there is a screw that secures the shock absorber to the tensioner but the tensioner doesn't have threads for the screw. I wasn't going to put on the tensioner without the screw so I am just going to go for the oem part off of Autohausaz. Maybe some C300's don't have the shock absorber for the tensioner but I doubt it. Hope this helps someone in the future.
Junior Member
Joined: Feb 2012
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Mercedes GLK 220CDI (Diesel)
Serpentine Belt, 220 CDI (OM651 engine)
I'm also planning to change my belt in the not-too-distant future. However, I notice there is a plastic shroud in front of the pulleys. I will need to take this shroud off, but I'm not sure how exactly this thing is bolted onto the front of the engine. Is it something that requires some sort of special tool? I can hardly get a good look 'cause the gap between this shroud and the radiator is pretty tight.
Junior Member
Joined: Oct 2012
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C300
I didn't have to take off anything. Just the engine cover. BTW another edit! I promise last one. The OEM tensioner is just a rebranded Gates tensioner. As for the hole not being threaded, I just used the same screw and screwed it in. It threaded the tensioner for me. I had to buy an extra one though since I stripped the head of the the inverted hex. It had to be shipped from Germany and costs around $2...
I hope this helps someone.
I hope this helps someone.
MBWorld Fanatic!
Joined: Apr 2012
Posts: 1,370
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From: Calgary
C63 AMG
Same noise happened to me recently when I tried to change my motor oil and accidental made a mess on the belt. I solved the problem by spry water on it while engine is warm and running.
