Need some advice on my engine noise please !!!
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Super Member
Joined: Feb 2008
Posts: 618
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From: orlando
Sold 2003 CLK 500,2003 SL 500,2006 Acura MDX,1998 BMW M3 convertible
Need some advice on my engine noise please !!!
Hello everyone...my 03 CLK 500 has a slight engine noise on idle,The noise seems to disappear when applying throttle.I did some Google search and found a utube video link from someone who has the same identical problem on his Mercedes. I would gladly appreciated any help/suggestion from our MBWorld forum members..Thanking you all in advance !!!
Here is the video link :
Here is the video link :
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Joined: Mar 2012
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CLK 550
Well only listening to the sound and trying to get normal common sense involved...
to be an lifter or internal engine component in general it is rotating to fast....
It also, like I mentioned sounds like something is rotating out of balance...
thats all I can say and is of course dependant on throttle
mechs please!
to be an lifter or internal engine component in general it is rotating to fast....
It also, like I mentioned sounds like something is rotating out of balance...
thats all I can say and is of course dependant on throttle
mechs please!
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It looks like he removed the belt to isolate the sound to being internal engine and not an accessory. This could be a timing chain issue. I know this is not an M272/M273 engine with the balance shaft problems, but there are still anecdotal problems with timing chains. The tensioners can break or the chains can stretch. I was getting a clanking noise out of mine when the timing gear started stretching. It would quiet down with increased RPMs.
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Joined: Feb 2008
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From: orlando
Sold 2003 CLK 500,2003 SL 500,2006 Acura MDX,1998 BMW M3 convertible
It looks like he removed the belt to isolate the sound to being internal engine and not an accessory. This could be a timing chain issue. I know this is not an M272/M273 engine with the balance shaft problems, but there are still anecdotal problems with timing chains. The tensioners can break or the chains can stretch. I was getting a clanking noise out of mine when the timing gear started stretching. It would quiet down with increased RPMs.
I ask cause I got no cel and like I mentioned before my engine runs smooth !!
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I don't know if it's the timing chain or not - I'm just speculating based on the video. That person removed the belt to isolate the noise to the engine. You might want to try that, too. Also, a mechanic's stethoscope might be good to pinpoint to noises source.
Thread Starter
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From: orlando
Sold 2003 CLK 500,2003 SL 500,2006 Acura MDX,1998 BMW M3 convertible
I already removed the drive belt and still same problem .
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Chain or hydraulic lifter. Could also be a manifold/header leak.!
This is a purge valve.
http://www.google.co.za/url?sa=t&rct...2c8-QA&cad=rja
This is a purge valve.
http://www.google.co.za/url?sa=t&rct...2c8-QA&cad=rja
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Thread Starter
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From: orlando
Sold 2003 CLK 500,2003 SL 500,2006 Acura MDX,1998 BMW M3 convertible
I uploaded a video of the engine noise that to me its sound like a beehive !! I checked the noise with a long screw driver and put one end to the front part of the oil pan and the top end of screw driver to my ear I can hear the buzzing sound but when I do the same method using screwdriver to the back of the oil pan I don't hear the buzzing sound?? Could this be a crank bearing ?? I also took my cars to a mercedes shop and they told me The noise is normal ??? What you guys think !!
video:
video:
Last edited by jbenz99; May 30, 2012 at 11:53 PM.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Ouch - That is not normal. It could be a big or small end bearing or damaged lifter.
As Rudney said earlier. remove the Poly V belt to ensure that it is not an accessory. If not take an oil sample & send it to Blackstone for analysis. That will tell you if something is destroying itself in the engine.
As Rudney said earlier. remove the Poly V belt to ensure that it is not an accessory. If not take an oil sample & send it to Blackstone for analysis. That will tell you if something is destroying itself in the engine.
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From: S.E. FLA.
05 ML-500 , 03 CLK5.5 AMG has left the Garage
Noisey M-113 N/A Motor
Knowing the Mileage would help. But if it is truely up front near the harmonic balancer inside the C-Case , The oil pump drive sprocket & single roller drive chain is most likely the noise maker
Cheers _PTEngineering
Cheers _PTEngineering
Thread Starter
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From: orlando
Sold 2003 CLK 500,2003 SL 500,2006 Acura MDX,1998 BMW M3 convertible
so what cause the sprocket to wear down? Loose timing chain ?
Thread Starter
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Joined: Feb 2008
Posts: 618
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From: orlando
Sold 2003 CLK 500,2003 SL 500,2006 Acura MDX,1998 BMW M3 convertible
Ouch - That is not normal. It could be a big or small end bearing or damaged lifter.
As Rudney said earlier. remove the Poly V belt to ensure that it is not an accessory. If not take an oil sample & send it to Blackstone for analysis. That will tell you if something is destroying itself in the engine.
As Rudney said earlier. remove the Poly V belt to ensure that it is not an accessory. If not take an oil sample & send it to Blackstone for analysis. That will tell you if something is destroying itself in the engine.
Thread Starter
Super Member
Joined: Feb 2008
Posts: 618
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From: orlando
Sold 2003 CLK 500,2003 SL 500,2006 Acura MDX,1998 BMW M3 convertible
Super Moderator
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
It is possible that it is the oil pump simplex drive chain as suggested above. This chain is lightly loaded so unlikely unless the tensioner spring 41 has failed.
Sometimes the tensioner is the problem with noisy cam chains. External replacement method is in the Wiki.
Last edited by Glyn M Ruck; Aug 27, 2012 at 04:47 PM.
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CLS500 AMG package 2006, CL600 2002, SLK230 kompressor 2003 sold, E500 2004 sold, BMW 335xi M sport
I have a E500 2006 with 28k miles and its making the same noise as the CLK500 that buzzing noise on c-case, i use a sthetoscope and the buzzing its just in the front of the c-case if you put the steto just above the harmonic balancer (really close to harmonic) on the block you still hearing the noise, makes me think that could be the harmonic itself, but it sound only on cold during a period of 5-7 minutes, when engine its warm it sound nice and quiet, do you solved the issue?
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Joined: Oct 2015
Posts: 61
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CLS500 AMG package 2006, CL600 2002, SLK230 kompressor 2003 sold, E500 2004 sold, BMW 335xi M sport
I uploaded a video of the engine noise that to me its sound like a beehive !! I checked the noise with a long screw driver and put one end to the front part of the oil pan and the top end of screw driver to my ear I can hear the buzzing sound but when I do the same method using screwdriver to the back of the oil pan I don't hear the buzzing sound?? Could this be a crank bearing ?? I also took my cars to a mercedes shop and they told me The noise is normal ??? What you guys think !!
video:http://www.youtube.com/watch?v=G0iP2UMwW5A
video:http://www.youtube.com/watch?v=G0iP2UMwW5A
Newbie
Joined: Dec 2015
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w211 e500
I uploaded a video of the engine noise that to me its sound like a beehive !! I checked the noise with a long screw driver and put one end to the front part of the oil pan and the top end of screw driver to my ear I can hear the buzzing sound but when I do the same method using screwdriver to the back of the oil pan I don't hear the buzzing sound?? Could this be a crank bearing ?? I also took my cars to a mercedes shop and they told me The noise is normal ??? What you guys think !!
video:http://www.youtube.com/watch?v=G0iP2UMwW5A
video:http://www.youtube.com/watch?v=G0iP2UMwW5A
