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Many car owners are tangled in the choice of timing belt and timing chain when buying a car. What are these two things in the end? How to choose? And look at the details of the car for everyone.
1. What is the timing?
The timing is when the engine intake valve and the exhaust valve are opened. When the intake valve opens, fresh air enters the cylinder. At this time, the exhaust valve also exhausts the exhaust gas, and the intake valve and the exhaust valve open time. There is a certain overlap, and only the entire process is consistent to ensure that the engine has a good power output, so the timing is very important for the engine.
Everyone car reminds the majority of owners: the timing belt and timing chain can ensure the stability of the timing system.
2, the advantages and disadvantages of the timing belt
Advantages: quiet, low transmission resistance
The sound of rubbing rubber with metal is inherently very small, and noise can be ignored after passing through the engine compartment. And the friction between rubber products and metal is also small, the belt's transmission resistance is small, and it can ensure the normal power output and acceleration performance of the engine.
Disadvantages: rubber is easy to age and needs to be replaced
Due to the problem of rubber material, aging is inevitable, and the rotating force of several thousand revolutions is carried by this rubber timing belt. Therefore, the timing belt must have an aging period and a fatigue period, so most manufacturers recommend Change the timing belt when about 60,000 kilometers to avoid fatigue fracture. Once the belt breaks, the camshaft will stop rotating, and the up and down movement of the piston remains, and the piston assembly inside the cylinder may be damaged by the impact force. Everyone car reminds the majority of owners: maintenance costs are very expensive, while serious ones are basically scrapped.
3, the advantages and disadvantages of the timing chain
Advantages: strong and durable
The metal chain is obviously superior to the transmission reliability, and the durability is very high. Unless the driving habit is very bad, the chain will be broken by the impact of the speed. Otherwise, the automatic tensioner can ensure the maintenance-free for the whole life.
Disadvantages: Wear and noise
Everyone car reminded the majority of owners: the mutual meshing of metals inevitably results in less than ideal noise control, and after more than 100,000 kilometers in general, the friction between the timing chain and the drive wheel becomes more and more serious. Hear the metal friction sound in the engine compartment. And in the case of unsatisfactory lubrication, there will be an increase in transmission resistance, transmission inertia increases, followed by higher fuel consumption and power loss. Although the timing chain generally does not need to be replaced, the replacement price is more expensive than using a timing belt. However, with the development of technology, the noise problem of the timing chain has been solved better now.
4, summary
Everyone car reminds the majority of owners: timing belts and chains have their own advantages and disadvantages, from the maintenance point of view, in the normal driving situation, most of the timing chain can achieve at least 300,000 kilometers maintenance-free, this point for 60,000 The timing belt that has to be replaced is certainly beyond the reach of the kilometers. For those who want to worry about the car, the timing chain may be the ideal choice.
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