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2008 s63 engine noise please help

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Old Aug 22, 2017 | 04:11 PM
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2008 s63 engine noise please help
My s63 been in the shop for 2 month now. It started making noise only when it's fully warmed. The noise goes away when you step on the gas. So far I changed Idler pulley three of them belt tensioner belt. Harmonic balancer. Water pump and Alternator and it's still making the noise. Anyone have the same problem? https://youtu.be/623dOJwp3Lo
Last edited by Sfcprez415; Aug 22, 2017 at 04:17 PM.
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Old Aug 22, 2017 | 09:58 PM
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Have you tried spraying some silicone spray on the main drive belt to see if the noise go's away or changes?
Just something to try.
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Old Aug 22, 2017 | 10:26 PM
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Originally Posted by barryrobinson19
Have you tried spraying some silicone spray on the main drive belt to see if the noise go's away or changes?
Just something to try.
I replaced all the belts but I will give it a try thanks for the tip
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Old Sep 4, 2017 | 09:49 PM
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2011 S550 / 2001 S430 - RIP
Originally Posted by Sfcprez415
My s63 been in the shop for 2 month now. It started making noise only when it's fully warmed. The noise goes away when you step on the gas. So far I changed Idler pulley three of them belt tensioner belt. Harmonic balancer. Water pump and Alternator and it's still making the noise. Anyone have the same problem? https://youtu.be/623dOJwp3Lo
Speculations..... The A/C compressor bearing might be going out.

I only say this because I went through it on my 01.
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Old Sep 4, 2017 | 11:03 PM
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Originally Posted by johnksss
Speculations..... The A/C compressor bearing might be going out.

I only say this because I went through it on my 01.
I just ran the car without the v and it's was making that noise. Only when the car is super hot so it has nothing to do with a/c compressor.
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Old Sep 5, 2017 | 11:20 AM
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2011 S550 / 2001 S430 - RIP
Originally Posted by Sfcprez415
I just ran the car without the v and it's was making that noise. Only when the car is super hot so it has nothing to do with a/c compressor.
The "V"? Is this the same as you removing the serpentine belt and running the engine?

What about the fan?

I sure hope mine does not have this problem when it comes time for me to purchase it...
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Old Jan 5, 2023 | 07:45 AM
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Originally Posted by Sfcprez415
My s63 been in the shop for 2 month now. It started making noise only when it's fully warmed. The noise goes away when you step on the gas. So far I changed Idler pulley three of them belt tensioner belt. Harmonic balancer. Water pump and Alternator and it's still making the noise. Anyone have the same problem? https://youtu.be/623dOJwp3Lo
Yes when making the noise try to remove the oil cap to find out if it has a lot of vacuum holding the cap down. If it does the problem might be because of a bad crankcase vent valve.
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