What will happen when the valve is topped?

A click sound will be heard on the side of the valve hydraulic tappet. The noise law is not obvious. After increasing the engine speed, the noise is weakened or disordered, and disappears at high speed. The cold car is more obvious, and the noise of the hot car is gradually weakened.

Hydraulic tappets can automatically eliminate the valve clearance and reduce the noise when the engine is working. If the engine is running, the hydraulic tappet is faulty. The reason may be that the oil level is too high or too low, which causes the oil with bubbles to enter the hydraulic tappet, forming an elastomer and producing a valve tappet.

The oil pressure is too low, and there is a lack of lubricating oil in the hydraulic tappet, which makes air enter the hydraulic tappet and produces valve foot sound. When the engine is not used for a long time, the hydraulic tappet is over-compressed, and there is not enough oil to let air in after restarting, resulting in the ringing of the valve foot.

Extended data:

The valve top is introduced as follows:

Check the oil level when the engine with hydraulic tappet has a valve foot ringing. If the oil level is too low, add oil to the standard height. Start the engine and run it to the normal operating temperature at the speed of 2000 rpm. Run the engine at a speed of about 2 minutes. If the ringing of the valve foot disappears at this time, you can continue to use the engine without disassembly and maintenance.

If the ringing of the valve foot still exists, it should be disassembled for inspection. For the removed hydraulic valve tappet, you can hold the upper and lower end faces of the hydraulic tappet with your fingers and press hard. If it is elastic, it means that the hydraulic pressure has failed and should be replaced. Attention should be paid to the ringing of hydraulic tappets. If there is any fault, replace the parts with serious wear and oil leakage when troubleshooting.

People's Network-Two major causes of car jitter Check the intake system or throttle.

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