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Once the serpentine belt is removed, unbolting a Fox 5.0's original accessory pulleys is not difficult, nor is installing the new March pulleys. Ricardo replaces the water-pump first. There is no need to drain any water or anti-freeze from the cooling system. The idea of slower pulley speed often raises concerns about the probability of an engine overheating, especially in stop-and-go traffic. While this could happen, it is dependant on the condition of the cooling system. To keep things cool, installing a cooler thermostat (160 degrees) is recommended.