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Old 05-24-2006, 05:43 PM
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Join Date: Oct 2005
Location: Chicago burbs
Posts: 25
w 210 diesel belt tensioner

Just got word rom dealer after replacing belt tensioner SHOCK, the rattle is still there, & now need to replace belt TENSIONER. No problem, but was told there are several additional parts required with space & access just as tight as in replacing the shock. ( The lower bolt on tensioner shock required pulling fan pulley off to fully allow lower bolt coming out) I have a good dealer who will install parts I purchase,but am also slightly disappointed in their original diagnosis being the shock & not the tensioner. Of course I can't ask them to remove the shock I bought, but was curious on both the steps involved & ease of replacement as a DIY'er. I wonder if they're making up their lost "parts" margin by mis diagnosing.

P.S. In the process of looseningthe fan pulley their rookie tech snapped a bolt & they had to eat the additional hours due to his inexperience. Anyway it'll be an another $230.00 to install the tensioner once I get it.

06 CDI diesel fitter
96 E 300 D (sold but still chuggin)
87 300d (sold)
87 300TD (sold)
01 ML 320 (what was I thinkin?)
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Old 05-24-2006, 07:49 PM
Registered User
Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
The spring tensioner should not take you more than 5 minutes to replace. Requires removal of one bolt (loosen bolt, use large dia screw driver or socket extension to take up the tension, pull the bolt and release the tension).

I was able to loosen the bolt on the tensioner shock far enough to get the old shock out and new one in without removing anything. Is tight, but can be done.

Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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