Engine gasket burning and compression system air leakage are frequent failures.
The burning of the cylinder pad will seriously deteriorate the working condition of the engine, so that it can not work, and may cause damage to some related parts or parts;
In the compression and work stroke of the engine, it is necessary to ensure that the upper space of the piston is sealed in good condition and no air leakage is allowed.
Combined with the symptoms of cylinder gasket burning and compression system leakage, the causes of the fault signs are analyzed and judged, and the operation methods to prevent the fault and eliminate the fault are pointed out.
First, the failure performance of the cylinder pad after it is washed out
Due to the different position of the cylinder gasket burn, the fault symptoms are also different:
1, gas channeling between two adjacent cylinders
Under the premise of not opening the decompression, shake the crankshaft, feel that the pressure of the two cylinders is not enough, start the engine work when black smoke phenomenon, engine speed decreased significantly, showing insufficient power.
2, cylinder head leakage
The compressed high-pressure gas escapes into the cylinder head bolt hole or leaks out at the joint of the cylinder head and the body. There is a yellowish foam in the air leakage, serious air leakage will make a "pili" sound, and sometimes accompanied by water leakage or oil leakage, and you can see that the corresponding cylinder head plane and the nearby cylinder head bolt hole have obvious carbon deposition.
3. Gas oil in the oil passage
High-pressure gas runs into the lubricating oil passage connecting the engine block with the cylinder head. The oil pan oil temperature is always high when the engine is running, the oil viscosity becomes thinner, the pressure decreases, and the deterioration is fast, and the oil sent to the upper cylinder head lubricating valve mechanism has obvious bubbles.
4, high pressure gas into the cooling water jacket
When the engine cooling water temperature is below 50 ° C, open the water tank cover, you can see that there are more obvious bubbles rising in the water tank, accompanied by a large number of hot gas emitted from the water tank mouth, with the gradual rise of the engine temperature, the hot gas emitted from the water tank mouth is also increasing. In this case, if the water tank overflow pipe is blocked, and the water tank is filled with water to the cover, the phenomenon of bubbles will be more obvious, and there will be a boiling phenomenon when it is serious.
5, engine cylinder and cooling water jacket or lubricating oil channel channeling
There will be yellow and black oil foam floating on the upper surface of the cooling water in the tank or there is obviously water in the oil in the oil pan. When these two kinds of channeling phenomenon are serious, it will make the exhaust with water or oil.
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