After the overhaul of the car, the timing difference is half a tooth, and the timing of the car is w

There are strict standards for engine overhaul, and the following is an important "indicator" for engine overhaul, and the engine is going to be overhauled on the surface of these signs.

1.Cylinder pressure difference: The cylinder compression pressure should meet the original design regulations, check that the tachometer and cylinder pressure gauge do not meet the requirements and are unqualified, and the pressure difference between each cylinder is unqualified

The difference between the pressure of each cylinder and the average pressure of each cylinder is not more than 8 measured with a tachometer, cylinder pressure gauge or with an engine comprehensive analyzer (the pressure difference between each cylinder of Yuedong engine that does not meet the standard is unqualified.) When the cylinder pressure of the Yuedong engine is lower than its standard value, there will be serious black smoke.

2.Large fluctuation of idle speed: the engine is stable at idle speed, and its speed meets the original design regulations. The speed fluctuation is not more than 50r min, and the operation test is carried out with the tachometer or measured with the engine comprehensive analyzer.

3.Low power: the maximum power of the engine shall not be lower than 90 of the original design calibration value, and the dynamometer shall be measured according to the relevant regulations.

4.Fuel consumption rate: The minimum fuel consumption rate of the engine shall not be higher than the fuel consumption meter required by the original design.

5.Low torque: the maximum torque of the engine shall not be lower than 90 of the original design calibration value.

Again, the engine will shake by half a tooth.

The phenomenon of the wrong timing of the car is: it will cause a slight sound when the car is idling, and the sound is obvious at medium speed.

After overhauling or replacing the timing gear, there is a continuous sound, the higher the speed, the louder the sound, and the sound is especially obvious when accelerating sharply. This situation indicates that the timing gear engagement gap is too small. A rhythmic sound is audible at idle and increases as the rpm increases.

This situation indicates that the timing gear is not meshed evenly.

There is a clear rhythmic sound of metal crashing at idle, and the rpm increases and the sound increases. This indicates an axial displacement of the timing gear or a damage to individual teeth. When accelerating sharply, there is a sound, and in severe cases, the gear chamber cover vibrates.

This situation indicates that the timing gear engagement clearance is too large.

The wrong timing of the car will cause the crankshaft and the camshaft timing point to be misaligned, and the ignition timing is inaccurate. If the power is not enough, there is a tempering gun, the ignition timing may be delayed, it is recommended that you ask the maintenance worker to test the ignition timing.

Shivering at idle, abnormal number of revolutions.

As a result, the engine power decreases, the work is unstable, and the engine will shake.

This is called valve timing in the engine, that is to say, the piston and the valve work together, if it is not right, it will cause the valve and the piston to not work well, when the engine is working, the valve can not be opened well, nor can it be closed well.

Hello, I'll help you answer this question, this is called the valve timing in the engine, the simple two is that the porridge is very camshaft to work, that is to say, the piston and the valve work together, the timing is not right, it will lead to the valve and the piston can not work well, when the engine is working, the valve should be opened not very well opened, the closure can not be well closed, the engine does work to cause the engine power to decline, the work is unstable, the engine will shake, I hope to answer your questions, hope to adopt.

The ignition is inaccurate, or the car is not on the line.