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The cause of the valve foot ring? What is the cause of the valve foot ring and does it need maintenance?

The cause of the valve foot ring? What is the cause of the valve foot ring and does it need maintenance?

Engine inspection and maintenance2020-01-01 21:04:13


The abnormal phenomena of valve foot abnormal sounds are as follows: ◆ The sound is clear and clear when idling, and it emits a rhythmic "click, click". ◆ The sound is more pronounced at medium speeds. ◆ The sound is chaotic at high speed. ◆ The sound is obvious when the speed is suddenly reduced, and the sound is in the upper part of the engine. ◆ When the temperature of the engine changes or a single cylinder fires ...

How to see if the piston ring is good or bad

How to see the quality of the piston ring

Engine inspection and maintenance2019-10-03 00:25:01


The method of identifying the quality of the piston ring is as follows: the working surface of the piston ring must not be scratched, abraded, or peeled off, and the outer cylindrical surface and the upper and lower end surfaces should have a certain smoothness, and the curvature deviation should not be greater than 0.02-0.04 mm The standard sinking amount in the medium shall not exceed 0.15-0.2 ...

Ignition system troubleshooting method

Ignition system troubleshooting method

Engine inspection and maintenance2019-03-27 15:06:09


The occurrence rate of automobile ignition system failure is high, but because the ignition system is relatively independent, when the circuit is overhauled, the fault location can be determined according to the function of the circuit. Generally speaking, the engine cannot be started when starting, the engine is unstable, the engine is weak, tempered, fired, fired ...

Symptoms of broken valve seals Symptoms of valve seals aging

Symptoms of a broken valve seal

Engine inspection and maintenance2019-03-25 16:47:35


Valve oil seal is used to seal the engine valve guide. The function of the valve oil seal is to prevent the oil from entering the intake and exhaust pipes, to prevent the loss of oil, to prevent the leakage of the mixed gas of gasoline and air and the exhaust gas, and to prevent the engine oil from entering the combustion chamber. Valve oil seal is one of the important parts of engine valve group ...

Failure symptoms of high pressure oil pump

How to judge the high pressure oil pump is broken

Engine inspection and maintenance2019-03-25 16:04:12


The internal direct injection engine is different from the traditional electric injection engine (manifold injection), which can directly inject gasoline into the cylinder for combustion. If you want to inject gasoline into the cylinder accurately, the direct injection engine will definitely be different from the traditional electric injection engine in terms of structural details. One of them is an extra high-pressure oil system. ...