A feeler adjusting valve clearance scene

This is only a short while ago, the old driver will repair and maintenance skills, but now they are gradually neglected ignored, even now the heavy truck engine do not adjust the valve clearance, some cars ran thousands of kilometers of valve clearance never had.

I just want to say that your engine has come through

Valve clearance is very important, too big, small, no, what is the valve clearance?

It is a gap between the valve group and the valve train when the cold assembly of the engine parts of the Baotou North express truck is installed.

When the valve clearance is too large, the valve opening will be reduced (the lift is not enough), the intake and exhaust resistance will increase, the volume of inflation will decrease, thus affecting the power;

When the valve clearance is too small, the valve will be closed under the hot condition of the valve, which will cause the cylinder to leak and the working pressure will decrease, which will lead to the decrease of power. Meanwhile, the valve will be easy to be ablated.

Don't believe the lie without adjusting the valve space

Therefore, checking the valve clearance in time, ensuring proper valve clearance is beneficial to the normal operation of the engine, reducing the abnormal shock and wear of the valve mechanism, reducing fuel consumption and prolonging the service life of the engine.

When does the valve clearance need not be adjusted?

The valve train driven by overhead cam tappet can realize automatic adjustment of valve clearance. Of course, the mechanism of automatic compensator with valve clearance is also common in car

However, for the vast majority of diesel engines in China, the valve train is also generally equipped with rocker and other mechanisms, that is to say, the valve clearance needs to be adjusted.

In cylinder brake technology popularization, some technicians will not tune

With the development of domestic heavy truck diesel engine, on the one hand, power displacement is more and more big, on the other hand, the demand for safety is higher and higher.

Many engines use the engine cylinder brake as the standard of safety. The so-called "cylinder brake" is to add an electric hydraulic system to the engine valve mechanism, which also brings new requirements to the valve adjustment.

Look at how the three engines adjust the valve:

Excessive publicity is misleading, long oil change is not equal to maintenance free

In recent years with the development of technology, the domestic heavy truck engine technology has no small progress, long oil, long maintenance cycle into a number of manufacturers propaganda slogan, one hundred thousand km oil replacement, longer maintenance period is only the maintenance cycle extended lubrication system.

As an engine, it has many systems, and this does not mean that the maintenance of these structures is too long, or even free of maintenance.

In the process of communication with some owners, there are some mistakes in the routine maintenance inspection. I have one hundred thousand km of oil for the engine, and the engine oil has not changed. Let me open the cylinder head and check the valve. It is very difficult to accept it!

In fact, check valve clearance open only valve compartment cover, and not Baotou North Ben heavy accessories cylinder head.

Some owners even hundreds of thousands of kilometers after the valve clearance did not check, until you feel Baotou beiben engine accessories abnormal when you want to adjust the valve clearance will be suspected, all inquire about, some maintenance workers actually said this advanced machine without adjustment of valve clearance, it can let a person feel unbelievable.

With the emission upgrade, the domestic heavy-duty vehicle technology is also rapidly upgrading, the application of a variety of electronic control systems and new technologies, so that the vehicle more efficient, fuel-efficient and safe.

But it is the premise of a timely maintenance of the vehicle, and the correct driving habits, adjust the valve clearance not rumor from the point of view, the existence of the customer service maintenance end plate is an indisputable fact, because of irregularities caused by the maintenance operation maintenance accident It is often seen.