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There is a small braket at the bottom of the engine that needs to be removed to slip the old belt off and put the new one on. Remove it or loosen one end so you can get the belt around it. One of the pulleys is a spring loaded idler/tensioner for the belt. Use a wrench on the center bolt of this pulley to remove enough tension to allow the belt to slip off. Save this pulley for last when you put the new belt on and repeat the same operation with the wrench. There should be a diagram in the engine compartment to show how the surpentine belt goes around all the pulleys. If not, note how the belt runs before removing it.

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Q: How do you replace the fan belt on a 1989 Buick Riviera?
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