W211 E55 noisy supercharger magnetic clutch

[well-dweller]

My magnetic clutch is rumbling. Is there a bearing inside the clutch that is giving rise to this noise? Thanks

 

[SL03WLY]

I believe there is. Think if you search for Nachi Bearing on Google what not you should find something.

 

[well-dweller]

Thanks SL03WLY, will have a look. I know they do a bearing for the front pulley, but didn't know if they did one for the magnetic clutch.

 

[SL03WLY]

I come across this video and there doesn't appear to be a bearing in the magnetic clutch.

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[Teego]

Could be the top idler pulley. Actually two pulleys on one shaft. Happened on my CLS55. In theory the bearings are replaceable but one of them is unobtanium. Hence the dreaded partsman's response. "It only comes as an assembly sir".
MB parts £480 inc VAT.
Motor Factors £200 for OEM quality.

In the early stages it was noisy until warm. It finally siezed without throwing the belts.

 

[SL03WLY]

@well-dweller Are you able to post a video or share some pictures of the issue with your supercharger?

Could the noise you are hearing in the areas as pointed out by Teego?

@Teego Just to be sure are you referring to the pulleys within this link -> Pulley Weblink

So would below 2?

• Febi Tentioner A1132000170
• Febi Double guide pulley A1132020419

 

[Teego]

@well-dweller Are you able to post a video or share some pictures of the issue with your supercharger?

Could the noise you are hearing in the areas as pointed out by Teego?

@Teego Just to be sure are you referring to the pulleys within this link -> Pulley Weblink

So would below 2?

• Febi Tentioner A1132000170
• Febi Double guide pulley A1132020419

It's the Febi Double Guide Pulley. Two pulleys on one shaft. The front one is metal and the rear one plastic. Here's a pic


This is what mine looked like when it siezed