If you?ve ever heard a squealing sound under your hood, chances are it was your serpentine belt. Your serpentine belt is a long belt that?s driven by your engine. It winds around several accessories that power important automotive systems in your SUV. Let?s go over them.
First, the serpentine belt drives your air conditioning system. It spins the compressor that makes the cool air that takes the edge off the summer heat in Mesa.
Next, the belt powers the alternator. The alternator creates electricity that?s used by your SUV?s electrical systems and also charges your car battery. Without the alternator, the battery will go dead in a few miles.
The serpentine belt may also run the pumps for both the power steering (some are electric) and power brakes (some use vacuum boost).
And, on most SUVs, the serpentine belt powers the water pump. The water pump circulates coolant through the engine to keep it within normal operating temperatures. On some Mesa cars, the water pump is powered by the timing belt instead of the serpentine belt.
When they understand what it does, Mesa drivers realize that if it breaks, it affects a lot of systems. That?s why manufacturers have recommended that it be changed every so often so that it doesn?t fail.
At Red Mountain Tire and Auto, we can perform a visual inspection of the belt to see if it has any cracks that signal the belt could fail soon. If the belt has more than three or four cracks every inch, has deep cracks that penetrate half the depth of the belt, is frayed, is missing pieces or has a shiny glazed look, it needs to be replaced regardless of age or mileage.
If it has lost a significant thickness, it also needs to be replaced. There?s a special spring-loaded pulley attached to the engine called the tensioner pulley. Its job is to make sure there?s a constant tension on the serpentine belt so that it doesn?t slip. The spring can become worn and no longer provide the necessary pressure to keep the belt tight. At Red Mountain Tire and Auto, we recommend that the tensioner be replaced at the same time as the serpentine belt.
As mentioned, a squealing sound could be a sign that the serpentine belt needs to be replaced. It may be loose if you hear a slow, slapping sound when idling your SUV.
All in all, the serpentine belt?s an important part for the function of your SUV. And it?s not that expensive to replace at Red Mountain Tire and Auto ? so it?s good to do so before it fails.
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