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Old 04-10-2002, 09:34 AM
Registered User
Join Date: Feb 2002
Location: Clearwater, FL
Posts: 46
Guide pulley

I have a noisy fan belt guide pulley on my '86 300E and I'm considering replacing it myself. This is the pulley located on the top passenger side. If someone has experience changing this out - please advise as to the difficulties I might anticipate.

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Old 04-10-2002, 09:42 AM
pmizell's Avatar
Benz Zealot
Join Date: Jun 2001
Location: Houston, Texas
Posts: 838

To accomplish this, you'll need to remove the fan clutch, then loosen the tensioner pulley a bit to remove the serpentine belt.

The pulley you speak of that needs to be replaced is the one on the bearing bracket and a new one costs about $22 here on Fastlane. One 6mm (I think) hex bolt holds it on -- you may or may not have a plastic cover over the front of pulley to remove first. Very easy to r&r.

If you need assistance on the fan clutch and tensioner please reply.

Good luck!


'91 300E, 209k miles
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Old 04-10-2002, 10:10 AM
Registered User
Join Date: Feb 2002
Location: Clearwater, FL
Posts: 46
Thanks for the reply, Paul.

Yesterday, I ordered the pulley, front flexdisk, new door checks, and a fuel filter from Fastlane. Hopefully, this will be my last project for a little while on the 300E - I need to begin my spring cleaning on the '88 300SE next. :p
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Old 04-10-2002, 04:13 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,123
Wish I'd seen the post. I have an unused pulley I'm trying to get rid of.

While you're in there, check the pulley the fan spins on. That one gets noisy too.

91 300SE
87 300SDL
81 300SD (on ebay)
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