W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Noise from s/c pulley?

Old Apr 12, 2015 | 10:37 PM
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2005 E55 amg
Noise from s/c pulley?

I noticed some noise coming from the small s/c pulley, like something needed to be grease down. Only have it for about 15k mile now.
Last time at the track, my best mph was 121.75 mph, and lowest was 118 mph. Today, I ran the car after a re-tune, and the best mph I can achieve was 117.88 mph. Not sure if it's from the tuning or from the s/c? Any ideas? I'm thinking about going back to stock s/c pulley after I add the 172 mm pulley.
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Old Apr 12, 2015 | 10:42 PM
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Closely inspect the rivots and springs on the front of the pulley. If you see any cracks change it asap.
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Old Apr 13, 2015 | 12:57 AM
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I spun the pulley around, and could hear the noise coming from there. It's not that loud though, but it's very noticeable on idle. I'll just go ahead and replace it with the stock pulley, just for safety.
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Old Apr 14, 2015 | 09:20 AM
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replace the pulley bearing, mine went out around 18k miles

~$80 part
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Old Apr 15, 2015 | 01:47 AM
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Originally Posted by Toadster
replace the pulley bearing, mine went out around 18k miles

~$80 part
Do you have the small s/c pulley or the stock pulley? And where can I get the pulley bearing from? Thanks.
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Old Apr 15, 2015 | 08:10 AM
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No to hijack thread, but if the SC bearing is good, should it rotate by hand completely free of noise?
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