Shakes in Serpentine Belt system?

2007 VOLKSWAGEN GOLF
200,000 MILES • 1.9L • 4 CYL • TURBO • 2WD • MANUAL
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KLEVIC22
What part could be wrong for this? these both shake.
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Jun 26, 2025 at 4:44 AM
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STRAILER
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Yep, this happens when the serpentine belt tensioner goes bad, here is how to replace it, also you should install a new belt as well. Remove these three bolts after the belt is removed. While the belt is off, spin each accessory to make sure they spin freely. Check out the images (below). Please let us know what happens.

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Jun 26, 2025 at 11:56 AM
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KLEVIC22
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Understood. Could the alternator freewheel pulley be bad also? I’m going to a mechanic tomorrow and don’t want to change all the parts. I’ve just done the phase kit a couple of days ago along with water pump.
Jun 26, 2025 at 2:32 PM
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STRAILER
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I don't think the one-way clutch can do this, but you never know. I would do the tensioner first; it is a common failure.
Jun 26, 2025 at 4:52 PM
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