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#1
11-01-2009, 03:34 PM
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Am I shredding my belt?
This is a Euro 300D (W124) with the NA 603. The belt was changed ~ 1000 miles ago when it partially shredded enroute to Maine. The shop who did the "emergency repair" said everything was lining up and the tensioner looked fine.
Looking at my belt today, I noticed some shavings on the side. I can also see a very faint line on one side developing. Is this normal or should I be concerned? 
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Mike 82 Spider 86 560SL (For Sale) 87 CX25 TRD Turbo 2 89 Milano Verde 89 Mondial t Coupe 92 300D 94 E420 
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#2
11-01-2009, 03:48 PM
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Is it rubbing against anything, do you have a rough spot on one of the pulleys?
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#3
11-01-2009, 04:01 PM
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picture is a little fuzzy but looks good. on the side shown. what about the other side of the belt. Here's a description with pictures for checking belt condition. http://www.autorepairfacts.com/maintenance/checking-engine-drive-belts/
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92 300D 2.5L OM602 OBK #59
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#6
11-01-2009, 05:36 PM
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Quote:
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#7
11-01-2009, 07:45 PM
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We need to see the other side. Thats the money shot.
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92 300D 2.5L OM602 OBK #59
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#8
11-01-2009, 08:44 PM
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From the pics it looks fine to me... When threads start coming off you have a problem
 -J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#9
11-02-2009, 10:05 PM
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Hows belt riding on that tensioner pulley? Is it off the front even a little??? If it is, big problem. The belt must ride COMPLETELY on the tensioner pulley, and the tensioner pulley is only as wide as the belt with very little extra width. If the belt is not entirely riding on that pulley, it will shred in quick order. Ask me how I know this...
It seems there was a couple of different tensioners installed on that engine, and 2 of them got little shims between the tensioner and block. This is very easy to miss, and even 1/16" will cause the belt to shred. Take a closer look at that and let us know. I dont see front edge of tensioner pulley in your pics, which is reason i ask.
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Paul Benz-less I need an SDL !
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#10
11-02-2009, 10:12 PM
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It appears to me that there is some wear/rubbing on the engine side of the belt . . . is that what your talking about?
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82 240D Manual 277K and still rolling! 02 Volvo S60 AWD For Sale
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#11
11-02-2009, 10:37 PM
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When checking the engine drive belts, you are going to look for two things with your inspection.
Look for the proper belt tension and look for any sign of wear. (Cracks, frayed edges, or glazed back side of the belt) \ Worn belts (cracks and glazed present) Good results for drive belts should be as follows: Visual – No glazing or shiny areas on the back side of the belts, and no dry cracks on the pulley side or between the ribs of the belt. If you can read the brand name on the belt and its not squeeling then it’s probably not loose.
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92 300D 2.5L OM602 OBK #59
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#12
11-02-2009, 10:43 PM
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If it's a Continental brand belt (?)
That looks like rubber mold flashing. Little bits of left over rubber in a checker board pattern.
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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine) Raleigh NC - Home of deep fried sushi!
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#13
11-03-2009, 06:21 PM
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Thanks for all the replies. I've been keeping a close eye on the condition of the belts over the past few days and today I noticed the first signs of fraying on the edge closest to the engine. So it looks like something isn't lining up correctly or, as some have suggested, the tensioner is missing its shims.
Being a noob to these cars, I took it over to Wolfgang's in Tenafly, NJ which came highly recommended from this board. After I hear back tomorrow, I will post their findings.
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Mike 82 Spider 86 560SL (For Sale) 87 CX25 TRD Turbo 2 89 Milano Verde 89 Mondial t Coupe 92 300D 94 E420
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