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SLK 230 2000
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Discussion Starter #1 (Edited)
I know what your thinking ahhh ... another help thread!!!
Well i have talked to a few members before i resorted to this.

http://www.youtube.com/watch?v=UViku8_lqus&feature=player_embedded

Ok, that noise is not the SC i tested that. As you can tell in the Clip it is comeing from the driver's side. The noise goes away around 2500 rpms.
Any ideas?

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08 ml320 cdi,slk 230,01 boxster S,04 carrera911, 99 S320,67 GT350mustang,02G500L,96 s600 w140
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so what did the other folks tell u?
 

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SLK 230 2000
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Discussion Starter #3
Check the belts, the sc, the sc clutch, when dose it make the noise an when it dosent make the noise. then manicdemise said it could be worn belt tensioner pulley bearing.
When i start the car cold there is no noise but after ahh around 30 min drive it starts.

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08 ml320 cdi,slk 230,01 boxster S,04 carrera911, 99 S320,67 GT350mustang,02G500L,96 s600 w140
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how about taking off the belts first. check if its engine related.from der u can determine weather its the tensioner or the sc. make sure you idle it at 2500rpm and do it quikly as not to damage the engine or have an overheat
 

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SLK 230 2000
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Discussion Starter #5
see that is the hard part it only dose it when it is hot after running for 30min or more, i'll see but its going to be hot as hell in their.
also its not the sc the noise is comeing from the driver side watch what i have recoreded.
http://www.youtube.com/watch?v=UViku...layer_embedded
 

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2000 slk230,firemist
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Get a mechanics stethescope, cheap, or use a 4' section of tubing, stick one end in your ear, move the other end around moving parts till you isolate the sound. You'll never be able to correct till you isolate the part or parts. Different speeds and temps can create a multitude of changing sounds. Just a quick listen to your vid, sounds like its loud enough to easily isolate.
 

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'99 SLK230 sport
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297 Posts
It might have something to do with your tranny or gear box. Or your SC clutch going bad. The noise isn't present at start up because the clutch is engaged; after the secondary air injection runs it course you hear the noise since the clutch is disengaged. When you reach 2500RPMs the clutch engages and the noise goes away. The clutch and SC gears, I've read, are said to go bad after 120,000 miles because the clutch plates wear down and the oil breaks down in the SC gears after that much mileage of wear and tear.

What you can do is try starting up your car, in the morning, with the SC unplugged and see if the noise is still there. If it isn't, it has to be the clutch. Or after the car is warmed up and idling with the clutch disengaged, spay water into the SC clutch and see if the noise goes away. You might want to chage the tranny fluid also.

Check out this thread with same noise problems:
http://www.benzworld.org/forums/r170-slk-class/1418441-loud-whining-noise-when-idle-tranny.html

P.S. A worn idler pulley bearing doesn't whine, it's more of a "clunk-clink" noise as if the ball bearing are jumping around in their housing.
 

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2003 SLK230
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Picking up on ganndallff's comments, you can use a long screwdriver (held to your ear) as a stethoscope as he described (it's an old mechanic's trick). I don't own an SLK (yet), but based on the location, its cyclical nature and the fact that it vanishes with increased rpms, I wonder if it might just be a pulley- or water pump bearing. In any case, noises coming from individual/static components should be relatively easy to isolate with a screwdriver stethoscope.
 

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SLK 230 2000
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Discussion Starter #9
I know i tried to do the old mechanic's trick yesterday but i didn’t have anything long enough. But know i do an i got home turned the car off not thinking came back 10 min later an it didn’t make the noise so i took it for a ride went a little hard on the gas. Came back home 10-15min later got out an still no noise??? So I used the rod with rubber end an heard a grinding kind of clink sound from that pulley base in the pic top driver side.

Every were else sounded the same even the SC.
I’m stumped an Peed off, I don’t want be setting on the side of the road here soon. Tomorrow I will test it before I turn it off an see what I come up with.

So i also gave the car gas while in neutral. I’m not sure if this loud click noise when the Sc Clutch engages (guessing), can hear it better towards the end of clip.
YouTube - 100 1637
 

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Discussion Starter #10
haha thanks livefreeordie for the worries but if it saves me money i'll take the risk the military will clean up the mess ;}
 

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Discussion Starter #13 (Edited)
i hope to figure this out.

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Is that Click noise sopost to be like that?
 

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Discussion Starter #14
Ok i got home an got to work!
Here is my synopsis; with the end of a cane I could hear every noise around every pulley except one. The harmonic balancer, I could place it around it but no were on it. So I ran a piece of a hose from under the car and I spliced the end of the hose to I can more clearly without a doubt know that the noise is coming from there. Well it sure enough is the harmonic balancer, how or why an has this happened before???
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Also I found a strange clink (metal on metal noise) at a random rate, right under the harmonic balancer. Coming from that silver catch pan, and after running the car in park for about 20 min the original noise just stops like that the clink noise continues, if you can hear that in the movie that is not me that noise is coming from that pan.

 

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still cant figure it out. did you try taking teh belts out first? warm the engine then when you think its the right time that it usually comes out take out the belt and check thats the best way
 
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