The timing chain functions just as 
a timing belt does. The difference between the two is simply the material and area. One is made from metal and the various other, a reinforced rubber. Though timing chains were used first, belts were introduced into automobiles in the 1960s. Belts are quieter and due to their material, less expensive to produce. Timing chains are housed within the timing chain china engine and receive lubrication from engine essential oil and can last a long time, while timing belts can be found outside of the engine and tend to dry out and crack. Within the last few years, however, more vehicle manufacturers have integrated timing chains back into some vehicles with huge improvements such as a reduction in noise and vibrations, different a timing belt not all water pumps are driven by the timing chain. Verify your owner's manual to determine what kind of timing procedure your vehicle utilizes because they may vary from year to 12 months and by a car manufacturer.
时间链
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