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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 ...

Causes of trunk leakage

Causes of trunk leaks

Automobile inspection and maintenance technology2019-10-15 12:24:35


Sunroofs and trunks are the hardest hit areas of water leakage. Beware of blocked drainage pipes and aging rubber strips. The causes of leaks in trunks are very similar to those in car trunks and skylights. There are two main reasons: ① sealing strips aging; The tube is blocked; ① the sealing strip is aging; first, the aging problem ...

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 ...