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Old 06-16-2003, 02:13 PM
DTF
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Tensioner failure E300TD

Has anybody experienced a sudden tensioner failure leaving the serpentine belt flopping around? The car is my '99 E300 TD and I wouldn't have known except for the 'battery charge' warning light which came on when the belt started flopping. Can this cause any damage by driving a few miles like that?
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Old 06-16-2003, 04:33 PM
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It could, because the water pump won't circulate. Likely not, though. The belt tensioner will fail this way because the tension 'spring' is actually a molded-on rubber bushing that is twisted. When the rubber deteriorates, it breaks loose, and the assembly must be replaced. Don't drive until it is fixed.

Steve
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Old 06-16-2003, 06:19 PM
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make sure your mechanic replaces the entire unit as well as the adjuster....Good Luck ...we've all been there.
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Old 06-16-2003, 07:25 PM
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Do the shock while you're at it.
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