Modern Tire Dealer

DEC 2018

Magazine for the professional tire industry

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Page 25 of 113

—6— H ave you ever turned the key, revved up the engine, and backed out of the driveway, excited to hit the town for fun or even just to get some of those errands run, only to hear that dreaded and embarrassing squeal come from under the hood? You know, the one that makes your neighbors turn their heads, and not in a good way? You're not alone—we've all been there. Here are the top fi ve reasons for that squealing or chirping noise, and what you can do about it! AUTOMATIC TENSIONERS Most engines are fitted with spring- loaded belt tensioners whose job is to help the belt maintain proper tension through its life cycle and to reduce vibra- tions and belt noise. Over time, however, the tensioners wear, and improper tension The Top Reasons occurs, resulting in slippage, premature belt wear and unwanted noises such as belt squeal. While some tensioner pulleys can be replaced, to avoid injury, never try to disassemble one of the automatic tensioners. Call in a mechanic, who can safely take care of this for you. PULLEY ALIGNMENT Improper belt alignment decreases the life of the belt by up to 50%. A mis- aligned pulley creates belt noise due to fraying, uneven wear, overheating, and glazing of the belt. What's more, belt tem- peratures increase dramatically in relation to the degrees of misalignment. To ensure the proper alignment on installation, make sure you use the proper tools or leave the work for a mechanic you can trust. CHEMICAL CONTAMINATION The presence of fluids, such as antifreeze, engine oil, or power steering The Top Reasons Your 5 1 2 3

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