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#1
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Loose Serpentine Belt
I have a 1991 300te MB. Two months ago I installed a new belt. Recently it loosened and started slipping. It became so loose I could remove the belt. I have tried to adjust the belt tensioner but it will not adjust enough to tighten the belt. All the components seem solid...(no loose alternator, etc..) I am assuming I have a bad belt tensioner. Is this correct or should I look at something else before purchasing the tensioner???
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#2
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It's a common mistake that people try to adjust the tensioner screw without loosening the lock bolt. You may want to replace the attached gas spring too.
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#3
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It's not uncommon for the tensioner to fail either.
Gilly |
#4
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Assuming you know (and knew) the proper way to adjust belt tension, then the tensioner is likely all that has failed. Tension is provided by torsion on a molded rubber bushing, and the bushing separates with deterioration from age. If you ever adjusted the tension without loosening the locking bolt, then you probably also broke the adjuster - ordered separately.
Steve
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'91 MB 190E 2.3 '08 RAV4 Ltd 3.5 '83 Lazy Daze m'home 5.7 |
#5
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Check that the tensioner actually tensinns the belt, it may have siezed.
If it's ok, just buy the next size belt down.
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Paul Gibbons '93 320CE '73 Jensen Interceptor (Resting) Giant Full Sus Mountain Bike |
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