How do cars align timing belts? What is the timing belt of a car?

To replace the timing belt, first remove the plastic protective base plate under the engine, remove the engine crankshaft output wheel, remove the engine triangle bracket, remove the timing belt protective cover, then remove the timing gear and the brown toothed timing belt, install the engine crankshaft output wheel and install the generator belt, and finally start the car to run and check whether the condition is good after installation.

When the car is aligned. Some models have key positioning between crankshaft gears and crankshafts and camshaft gears and camshafts. Such an engine has markings on both gears, and to replace the timing belt, it is only necessary to align the markings on the belt with the markings on the crankshaft gear and camshaft gear.

There are timing points on the timing shaft and crankshaft to align them, but if you don't understand or can't find it, you can remove the engine valve and a spark plug. Disc ** motive, use the fast probe to probe a cylinder spark plug to know whether the piston is to the top dead center, and then to the axle, can not jack into the exhaust valve. In this way, it is easy to find the right time, and the high-voltage wire pointed by the fire head is a cylinder, and they can be plugged in in the order of 153624.

Check the manual The timing marks are different for different vehicles.

The timing of each car is different, and it is recommended to consult the vehicle repair manual.

The timing belt of a car is an important part of the engine valve system. The following is the specific introduction:1

Function: It is the valve mechanism that drives the engine, the upper connection is the timing wheel of the engine cylinder head, and the lower connection is the crankshaft timing wheel, so that the engine intake valve and exhaust valve can be opened or closed at the appropriate time to ensure that the engine cylinder can be suction and exhaust normally. 2.

History: Timing belts first appeared in the 60s and were used in most 4-cylinder vehicles and more and more in V6 engines. Timing belts were originally used on cam overhead engines, where they are more vulnerable to damage than traditional timing chains.

The automobile timing belt is a transmission belt used to control the positive exhaust time. When the engine is operating normally, it is necessary to keep synchronized operation at all times under the connection of the so-called timing connection of the opening and closing of the valve of the stroke of the piston moving up and down. More introduction of timing wax belts, such as hand clearing:

1. The internal components of the engine timing belt are composed of 6 parts, namely the timing belt, timing belt tensioner, guide wheel, intake camshaft pulley, exhaust camshaft pulley and crankshaft pulley. 2. The noise of the timing belt drive is less than that of the chain drive engine, the transmission is smoother, and the maintenance cost of the timing belt is much lower than that of the chain drive wheel potato source engine.

The role of the timing belt:

Through the connection with the crankshaft and a certain transmission ratio to ensure the accuracy of the intake and exhaust time. The belt is used instead of gears because the belt is quiet, has little variation and is easy to compensate.

The timing belt is to connect the camshaft and the crankshaft, control the opening and closing of the valve, control the rotation of the crankshaft and the movement of the piston up and down. So if the timing belt breaks, it will cause the valve to open and close at the wrong time. If the piston reciprocates up and down at the wrong time, the valve and piston will hit each other, causing damage to the valve and piston.

At this time, the engine will not work, and the engine will need to be overhauled.

The timing belt has low noise, low transmission resistance and low transmission inertia, which can improve the power performance and acceleration performance of the engine, and is easy to replace. However, the disadvantage is that it is easy to age, the failure rate is high, and the cost of use of the car owner is relatively high.

1.The installation of the engine belt requires a certain amount of technology: the ignition mark of the crankshaft and the camshaft, the belt is hung on the crankshaft wheel, and the belt is hung on the camshaft wheel from the opposite side of the tensioner, and then the belt is folded into the side of the tensioner to support the tensioner.

2.The installation of the engine belt requires a certain amount of technology: the ignition mark of the crankshaft and the camshaft, the belt is hung on the crankshaft wheel, and the belt is hung on the camshaft wheel from the opposite side of the tensioner, and then the belt is folded into the side of the tensioner to support the tensioner.

The tightness of the timing belt is very important, if it is too tight, the tension is too large, it can easily lead to breakage and affect the life of the belt; Therefore, after the timing belt is installed, the tightness needs to be adjusted to the belt pressure to 10mm looseness, which can be flipped 90 degrees. If the belt is pressed less than 10mm, it means that the timing belt is too tight.

3.In addition, if the timing belt is too loose, it is easy to slip, resulting in the configuration timing lag, resulting in the car shaking, refueling weakness, insufficient power, increased fuel consumption, etc., and it is easy to jump teeth when the engine load is large or the power impact is large, which may lead to the top valve, thereby damaging the engine. The use of the belt should be checked regularly to check whether the tightness is appropriate, and if it is too loose or too tight, it should be adjusted in time; In addition, it is also necessary to check whether there are cracks on the surface of the belt, whether the tooth shape is worn, if the wear is serious or cracked, it should be replaced in time to avoid breakage.

The automobile engine timing belt is generally in front of the engine, behind the generator belt, fan belt, etc. The function of the timing belt: The main function of the timing belt is to drive the valve mechanism of the engine, the upper connection is the timing wheel of the engine cylinder head, and the lower connection is the crankshaft timing wheel, so that the engine intake and exhaust valves can be opened or closed at the appropriate time to ensure that the engine cylinder can be suction and exhaust normally.