The need for timely replacement of the timing belt is one of those things that are mandatory every motorist who is the happy owner of a car with a belt driven. However, keeping in mind the date of the previous replacement can be problematic. It is much better to know and remember the most important signs indicating that it is time to change the strap.
1. Visual signs
The first and simplest thing to do periodically is to visually inspect the timing belt. Various defects in a large number - tattered edges and cracks, will eloquently suggest that the replacement time is already creeping up. The only "but" is that the timing belt is usually hidden under a special protective cover and first you still need to get to it.
2. Expiry date check
The timing belt is most often designed for operation with a mileage of 50 to 100 thousand km. The more powerful the engine of the machine, the faster the mentioned element wears out. In addition, the age factor should be considered. It is necessary to change the timing after 5-6 years after production. So even when buying a spare part, you should pay attention to the date of its production.
3. Sound signs
Is there an extraneous noise in the boot area? Most likely it is the timing belt making noise, hinting that it will break very soon. Cyclic shuffling sounds are a very bad sign, indicating that the belt is already in its last breath and will break very soon.
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4. You spoil with oil
It is worth changing the timing belt immediately if, for some reason, engine oil or any other technical fluids got on it. Most often this happens when a leak forms in the oil seals. This is dangerous, first of all, because such a timing belt will soon begin to slip.
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5. Used car
The timing belt must be changed if the car has just been purchased on the secondary market. Replacement of the timing belt (as well as all other "consumables") should be carried out in this situation, even if there are no visual signs of defects or wear.
Continuing the topic, read about how the car starts to pull and twitch: what needs to be checked without delay.
A source: https://novate.ru/blogs/170320/53815/