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Old 07-04-2003, 05:34 PM
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Serpentine belt tensioner

How do you adjust the belt tensioner on an 86 300e gas motor?
I need to pull the alternator and am having a fit trying to find the tensioner.
Any special tools? Alt bearing making noise.
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Old 07-04-2003, 07:08 PM
haasman's Avatar
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Join Date: Jun 2001
Location: San Francisco, CA
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Welcome to the ShopForum.

I used the search feature (upper right corner of this screen) and found this for you: Serpentine Belt Adjustment

'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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Old 07-04-2003, 08:21 PM
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
A noise from the vicinity of the alternator that is a rattling - similar to some bearing failures - is often simply the belt 'damper'. A miniature shock absorber, the rubber in the bushes eventually deteriorates, and it should be replaced.

'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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