What s going on with the new Bora cold start engine valve having a crowbar sound in winter

Hello, it's a clicking sound, such a sound is normal for a while when the cold car starts for a while, because the cold start oil has not been lubricated well, so there will be such a situation, the oil is lubricated well, there is no problem, if it has been ringing, then it is abnormal, it may be that the oil is poor and the oil is not good, you need to check.

Hello, the oil is not working, it will be fine in a few seconds.

Perhaps the adjusted valve clearance during maintenance has changed or been improperly adjusted; The valve adjustment screws are worn and skewed, the lock nut is loose, or the valve clearance is too large or inconsistent.

On the issue of abnormal noise, it is difficult for ordinary car owners to distinguish which ones are fault abnormal noises and which ones are reasonable abnormal noises. When I went to repair the vehicles that were detected by the Bury Bird Factory, only nearly 20% of the cars really had problems. In the case of a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that they lack their own understanding of mechanical knowledge, so they can distinguish the abnormal noise of the car and avoid wasting time and energy.

How to identify the sound of a car:

In the actual working volts, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (the abnormal volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise of automobiles, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

The causes of abnormal valve noise are: 1. The hydraulic tappet has a gap or serious wear; 2. The oil level of the crankcase is too high or too low; 3. The tappet is dirty; 4. The valve spring seat is worn and grooved, and the valve stem and conduit are worn; 5. The oil is thinner and the oil is replaced with the appropriate viscosity; 6. The oil pressure is too low or too high. The way to deal with valve squeak is as follows:

1. Remove the cylinder head; 2. Grind the valve, check the spring elasticity of the valve, and readjust the valve clearance. The function of the valve is to be responsible for inputting air into the engine and exhausting the exhaust gas after the combustion fluid is depleted, which is divided into intake valves and exhaust valves according to the engine structure.

The reasons for the Bora valve ringing are as follows:

1. It is caused by the gap between the hydraulic valve tappet and the cam (or valve seat). Most of the clearances are due to excessive wear of the hydraulic tappet, and the oil inside the tappet is quickly depressurized, resulting in abnormal noise, and the hydraulic tappet needs to be replaced;

2. The abnormal noise caused by the oil level of the crankcase is too high or too low, and the engine oil level needs to be checked. The abnormal noise caused by dirty tappets needs to be cleaned up by hydraulic tappets;

3. For abnormal noise caused by valve guide wear, it is necessary to dump the valve guide and install the valve with thickened valve rod. The abnormal noise caused by the oil is too thin, and the oil with appropriate viscosity needs to be replaced;

4. The abnormal sound caused by low oil pressure needs to check the reason for the low oil pressure slip.

What should I do if the Volkswagen Bora valve top tube sounds? Volkswagen Bora Tsai Wu ( Check price |What should I do if the valve top tube rings? The sound of the run-in between the Bora engine and the pressure rod just starts, as the engine gets hotter and hotter, the sound will also disappear and become smaller, which generally does not affect the normal operation of the engine.

If the intake valve top tube is damaged, it will affect the engine power, and even the punch will cause the cylinder pulling phenomenon, and the exhaust valve top tube damage will cause the burning fire gas to jump back from the intake pipe. The symptoms of automobile valve damage are as follows: 1. It will affect the working efficiency of the engine, and the power of the car will be reduced; 2. There will be abnormal noise, the engine will be unstable or unstable acceleration during operation, and the overtaking performance will also be reduced, and in serious cases, it will also cause the engine to start difficult, and there will be a judgment or phenomenon that cannot ignite, and the car will also have air leakage or increased carbon deposits; 3. If the valve is broken, it will lead to unstable cylinder work, and unstable cylinder will cause the engine to shake, the engine will work weakly, and it will also lead to the blockage of the exhaust pipe, and in serious cases, it will also lead to black smoke from the exhaust.

1. The engine is slow to oil or lacks oil, the oil supply is not in place, and the valve is different due to lack of oil lubrication.

2. The quality of the valve itself is faulty, or it has been used for too long, worn or stagnant.

3. The oil pressure of the oil pump is not good or the oil pump itself is faulty. . . Cause the abnormal sound of dry grinding movement due to lack of oil.

4. Oil quality problems, too thin or poor quality, etc.

5. Carbon deposition increases, and the oil has not been changed for a long time. Or the quality of the oil is too poor...

After a certain period of time, the oil is slowly lubricated or the abnormal noise may disappear after the oil is applied a little more.