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- 1). Open the hood, start the engine and shine the flashlight on the serpentine belt to locate an area where you can spray the ribbed side easily.
- 2). Spray the WD-40 (which stands for “water displacement formula #40”) on the ribbed side of the belt in a short, quick burst. Make sure your face is not in a direct line with the belt, as the WD-40 will eject from the belt, potentially getting in your eyes or on your clothes.
- 3). Repeat step two until the squeal sound stops. Wait one minute and then spray the belt dressing on the belt in the same manner.
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