If the belt isn't changed it will eventually break. This is typically at 90,000 miles, but see our timing belt replacement guide for vehicle-specific information. Most manufacturers recommend that the timing belt be replaced on schedule, as a form of maintenance. Unfortunately, like other rubber componants, timing belts wear out and must be replaced. This is why it is so important that the timing belt and tensioner be in good working condition all the time. The timing between camshafts, valves, pistons, and the crankshaft are so precise that if it is off even just one degree, the engine may not run or worse cause severe damage. Timing belts are critical compenants to ensuring a reliable running engine. For more information concerning each type of belt and when they should be changed click the links below. The drive belt is responsible for using the engine's revolutions to drive the power steering pump, a/c compressor, alternator, water pump, and other belt driven accessories. (Hence the term timing belt.)Īccessory drive belts are used to drive all the accessories that run off the front of the engine. The timing belt is responsible for making sure the engine's crankshaft, pistons, and valves operating insync or in time. Older vehicles use to have timing chains, but newer modern cars have changed to timing belts because they are much lighter, quieter, and more efficient. While they are similiar in nature to make up and what they do, they are very different. On most modern cars there is two kinds of belts timing belts and accessory drive belts.
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