Why does the engine belt stop squeaking when water is poured on it?
2 Answers
Introduction to the reason why the engine belt stops squeaking when water is poured on it: Pouring water can soften the belt and enhance friction. However, the squeaking problem will persist after the water evaporates. Instead of water, a polyol solution should be used to maintain the belt's flexibility for a longer time. Introduction to solutions for engine belt squeaking: 1. Apply polyol solution to the belt: The polyol solution can effectively reduce the hardening of the belt and maintain its elasticity, thereby solving the problem of insufficient friction; 2. Adjust the tensioner pulley: The tensioner pulley is responsible for keeping the gear and belt in close contact. Tightening the tensioner pulley can effectively increase the belt's friction, making various squeaking noises disappear automatically; 3. Replace the belt: When the belt shows signs of aging, it should be replaced promptly. An aged belt can cause slipping, affecting the vehicle's normal operation.
I often encounter this situation when repairing cars. When you pour water on the belt, the squealing stops—most likely because the belt is old and slipping. A new belt has soft rubber with sufficient friction, while an old, hardened belt is like worn-out rubber soles, smooth and shiny on the surface. Pouring water cools and contracts the belt, temporarily increasing the friction coefficient, so the noise disappears. But this is only a quick fix—after driving a dozen kilometers, the belt heats up and expands again, and the squealing will surely return. If there’s grease embedded in the belt grooves, it makes things even worse. Don’t rely on watering the belt as a band-aid solution—replace it with a new one as soon as possible. Otherwise, if it suddenly snaps one day, you’ll be stranded on the road with bigger troubles.
