Purpose of a Timing Belt

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The purpose of a timing belt in a car is to connect the crank shaft to the cam shaft in order to control the ignition timing and cam timing for the engine. Replace the timing belt on a vehicle every 50,000 to 60,000 miles with information from a certified master mechanic in this free video on auto repair.

Part of the Video Series: Auto Repair & Maintenance
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Video Transcript

Hello my name is Mark Blocker and in this segment we are going to cover what is the purpose of a timing belt. O'kay the purpose of a timing belt and it is located right in the front of the engine here underneath a plastic cover. It is going to be hard to see because of the accessories mounted on the engine and it is like that on a lot of the newer cards today but the purpose of the timing belt what it is is it is a rubber drive belt with teeth on it and it is used to connect the crank shaft to the cam shaft. The cam shaft operates the upper cam functions of the engine, operates a cam shaft and moves the valves up and down so it enables the engine to run. In older model vehicles they used a tiny chain or gear driven cam shaft device and the problem with that it created a lot of noise and a lot of extra friction so they went to a rubber nylon belt that has been reinforced to connect the crank shaft t the cam shaft because it allows for quieter, smoother, more efficient operation. However the timing belts do need to be replaced on a regular service intervals, that varies between every five years and 50,000 or 60,000 miles all the way up to 90,000 miles depending on the type and model vehicle that you are operating. The basic purpose of a timing belt is to connect the crank shaft to the cam shift and that controls the ignition timing and the cam timing for the engine. That's what a timing belt is.

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