How many years does it take to replace the timing belt of a car? What is the impact of a tooth difference in the timing belt?

The timing belt is an important component for the normal operation of the engine. It is a rubber product that is mainly connected to the crankshaft to ensure accurate intake and exhaust timing. Because it is a rubber product, the timing belt needs to be replaced regularly, otherwise it will be bad if the timing belt suddenly breaks during driving.

How often should the timing belt of a car be replaced?

The timing belt is a rubber component. As the engine works for a longer time, the timing belt and its accessories, such as the timing belt tensioner, timing belt tensioner and water pump, will wear or age.

For any engine equipped with a timing belt, the manufacturer will have strict requirements, requiring the timing belt and accessories to be replaced regularly within the specified period. The replacement cycle varies with the structure of the engine. Generally, it should be replaced when the vehicle has traveled 60,000 to 100,000 kilometers. The specific replacement cycle should be based on the vehicle's maintenance manual.

What is the effect of one tooth difference in the timing belt?

The timing belt is very important to the engine.

The engine can start if the timing belt is one tooth off to the left or right. Either the ignition timing is too late or too early.

If the ignition is too early, there will be a popping sound in the exhaust pipe, unstable idle speed, poor refueling, and a sound like the valve stem tapping. Especially when accelerating sharply, there will be a clear knocking sound.

If the ignition is too late, there will be backfire in the intake pipe, the water temperature in the water tank will be high, and it may boil. The refueling is not smooth and it feels stuffy.

If two teeth are wrong, the engine will be difficult to start or even fail to start, and even if it starts, it may not idle.

If multiple teeth are off, the car will not start at all. The valve should hit the piston, or the valve top will bend, or the piston will break.

Therefore, replacing the timing belt is a technical job, and it is recommended to find a professional master to do it.

How to align the timing belt when replacing it

The alignment method is the same for all kinds of cars, that is, turn the crankshaft to turn the piston to the top dead center of the first cylinder, then turn the camshaft to the top dead center of the first cylinder, and install the belt. You need to know how to read the mark of the top dead center of the first cylinder, which is on the car. If you can't see it, you can make a mark yourself. If you only change the timing belt, you can use correction fluid to make two points and install it in the right position.

When assembling the timing belt, the position marks of the large and small gears must correspond one-to-one with the corresponding position marks on the dust cover of the formal gear chamber, otherwise the timing mechanism will be poorly assembled.