W220 S500 Violent engine noise
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Joined: Jul 2010
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SL55, S500
W220 S500 Violent engine noise
Hi Guys,
I noticed a little ticking and clicking sound recently here we are 50 miles later and it is a violent clunking. I assumed it could be a sized pulley maybe a tensioner a/c pump? P/s pump?0- but after digging and talking to people this might be an timing chain related issue. Here is a video, has anyone seen something like this? I'm not sure and won't be able to take it to the shop until Sunday.
The noise is constant and the car drives smooth as butter.
Thanks
I noticed a little ticking and clicking sound recently here we are 50 miles later and it is a violent clunking. I assumed it could be a sized pulley maybe a tensioner a/c pump? P/s pump?0- but after digging and talking to people this might be an timing chain related issue. Here is a video, has anyone seen something like this? I'm not sure and won't be able to take it to the shop until Sunday.
The noise is constant and the car drives smooth as butter.
Thanks
Last edited by Das Geld 2; Jun 3, 2017 at 03:50 AM.
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From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
Yes, you will need to replace the entire compressor. The W220 compressor does not use a clutch pulley with a separate bearing like most vehicles. The compressor always turns with the engine - no clutch. The function is controlled by the computer changing the variable displacement of the compressor.
The pulley does contain an emergency disconnect system. There is a set of small rubber cushions between the pulley and the compressor shaft. If the compressor locks up, the rubber cushions shear, so that the drive belt can continue turning after the shaft stops. That is probably the noise that you have been hearing.
While you are replacing the compressor, inspect the idler and tension pulleys very carefully, and replace any that do not turn smoothly and silently. Also check the other belt-driven accessories for roughness or noise.
The pulley does contain an emergency disconnect system. There is a set of small rubber cushions between the pulley and the compressor shaft. If the compressor locks up, the rubber cushions shear, so that the drive belt can continue turning after the shaft stops. That is probably the noise that you have been hearing.
While you are replacing the compressor, inspect the idler and tension pulleys very carefully, and replace any that do not turn smoothly and silently. Also check the other belt-driven accessories for roughness or noise.
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Joined: May 2015
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From: Miami, FL
2003 CL 600
http://www.rockauto.com/en/catalog/m...ompressor,6628
They aren't that expensive, just buy a new compressor.
They aren't that expensive, just buy a new compressor.
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Thread Starter
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SL55, S500
Thanks guys for all the input. Will be getting an a/c compressor.
I'm wondering though what could be the reason for this all of a sudden. My AC stopped blowing air the same time as well..Low R-134A? Or did my whole control unit go kaboom and shorted the signals to this (always engaged compressor) and blower same time. I need to go check my blower right now and see why it's not blowing. A/C diagnostics showing code 1000 which is control unit fault.
02 with 115k now.
Thanks
I'm wondering though what could be the reason for this all of a sudden. My AC stopped blowing air the same time as well..Low R-134A? Or did my whole control unit go kaboom and shorted the signals to this (always engaged compressor) and blower same time. I need to go check my blower right now and see why it's not blowing. A/C diagnostics showing code 1000 which is control unit fault.
02 with 115k now.
Thanks
Last edited by Das Geld 2; Jun 4, 2017 at 12:54 PM.
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Thread Starter
MBWorld Fanatic!
Joined: Jul 2010
Posts: 4,359
Likes: 229
SL55, S500
http://www.rockauto.com/en/catalog/m...ompressor,6628
They aren't that expensive, just buy a new compressor.
They aren't that expensive, just buy a new compressor.
I'm after 9/2001 production.
Mine is this one(a00123000011), I'm noticing the ones for sale have a face plate is different that's for sale I think these should work right? According to rock they are interchangeable.
Mine
Latest ones
Thread Starter
MBWorld Fanatic!
Joined: Jul 2010
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Likes: 229
SL55, S500
