The video source is howautowork.com .this video is about camshaft drives belts,chain,and gear camshaft drive with more details about each advantage and disadvantage of them.and operating mechanism and operating condition,selecting which is the best and more.

Video Transcription

HowAutowork.com Student Auto Skills Timing belts and chains are use on overhead camshaft engines because the camshaft is further from the crankshaft. This is a typical chain drive system. It uses a hydraulic tensioner, which is feed oil under pressure from the lubrication system. The chain also uses guides to reduce noise and vibration. The tooth timing belt is might have fry the glass or why reinforcement synthetic rubber. It is stiff much those on the crankshaft and camshaft polis. Timing belts are quite than chains, but usually require regular manual tensioning. I also have a short of life than chains. They need regular replacing around 80,000 to 100,000 kilometers. If a belt breaks, it is not on the inconvenience, but it some engines it can cause a lot of damage.