How is a car cylinder block strain caused?

Cylinder strain is generally the coefficient of friction between the piston and the piston ring and the cylinder wall.

Caused by being too large.

In general, there are several cases, 1If foreign substances enter, such as gasoline, engine oil, or air, it is caused by the addition of inferior gasoline or engine oil, the residue in it, or the three filters have not been maintained for a long time, resulting in excessive impurities.

2.Water tank leakage or oil pan rupture and oil leakage, these two situations will cause the engine temperature to be too high, the piston and cylinder are made of different materials, the coefficient of thermal expansion is also different, and the engine overheating will cause the piston to be bruised.

The cylinder wall or stuck, illuminated into a strain, 3Water ingress into the engine. When there is water on the road surface, the water is too deep or the speed of the vehicle is too fast, resulting in water entering the engine air intake, due to the compression ratio of water and air.

The difference is large, causing the piston to not operate normally, causing damage to the cylinder block, this situation can sometimes be serious, and when it is violent, it will cause the connecting rod to bend, the crankshaft.

Break, and even break the cylinder block.

The engine oil itself has a certain amount of consumption, and excessive consumption is the problem of burning engine oil. Burning engine oil is caused by the following factors, as long as the following problems are solved, burning engine oil can be solved.

There are many factors that affect the burning of engine oil, such as: fuel quality, driving conditions, driving habits, maintenance habits, etc., the above reasons will aggravate the oil consumption and lead to the burning of engine oil, making the vehicle appear:

1. Carbon deposition occurs in the combustion chamber, which makes the gas ring of the piston ring stuck, and the sealing is poor.

2. Oil sludge is generated in the lubrication system, and the oil sludge blocks the oil return hole of the oil ring and weakens the oil scraping performance.

3. Wear occurs between the piston and the cylinder wall.

4. The valve seal is corroded and aging, and the sealing performance fails.

Nowadays, cars have crankcase ventilation systems (exhaust valves), which can also exacerbate oil consumption if there is a problem.

In addition, poor sealing performance of the valve seal, damage to the crankcase vent valve, or crankcase vent blockage will cause the oil to enter the cylinder with the crankcase gas to participate in combustion. For some old cars, it is relatively normal to burn engine oil, and we can appropriately choose slightly more viscous engine oil to increase the sealing between the piston and the cylinder wall. Of course, the ultimate solution to the problem of burning engine oil is to overhaul the vehicle more thoroughly and fundamentally solve the problem.

Satisfied, thank you!!

It will aggravate the wear of the piston, piston ring, and cylinder wall, resulting in a large amount of burning oil, gas stringing, high temperature, and in severe cases, the piston will be burned to death.

Nothing. It's more weight-bearing.

Engine cylinder pulling generally occurs after overhaul, and improper assembly during overhaul will cause cylinder pulling. It may also be caused by the oil not being lubricated or the oil is aging and cannot be lubricated. A small part of this is due to material problems between the pistons, rings, and barrels.

Car Cylinder Pulling Symptoms:

1. The compression pressure of the cylinder is reduced and the power is lost.

2. The pressure of the crankcase increases due to the downward channeling of the combustible mixture, which will cause the crankcase to be serious in serious cases.

3. The lubricating oil is channeled into the cylinder, causing the phenomenon of burning oil.

4. Serious smoke from the exhaust pipe; Abnormal engine noise; The engine does not work properly or even stalls.

Prevent car cylinder pulling:

1. The cylinder is poorly lubricated, the cylinder lubricating oil is insufficient or the oil supply is interrupted, and the cylinder is pulled by direct metal contact. The reasons for poor lubrication of the cylinder are: too little oil in the oil pan or too poor oil quality, too high temperature of the diesel engine or damage or failure of the piston ring (mainly the oil ring).

2. The run-in is not sufficient, and the run-in cannot be completed even if it is run in for a long time under too low load, and if it is rushed to run under high load, it will cause the cylinder to be pulled. Therefore, during the run-in period of the diesel engine, attention should be paid to the following: the amount of oil injection should be appropriately increased during the run-in period; After the piston ring is replaced, it should run under low load for a period of time; After the piston and cylinder liner are replaced, they should be run-in and then run under increased load.

3. Poor cooling, poor cooling will lead to high cylinder piston temperature and poor lubrication; Poor cooling will cause the piston and cylinder liner to overheat and overexpand and deform, lose the original normal clearance and pull the cylinder. The reasons for poor cooling are: insufficient discharge pressure of the cooling water pump, insufficient or interrupted water supply; Rust or dirt in the cooling water cavity; The water contains air bubbles, which accumulate in the cooling chamber and are not released, resulting in air resistance; The water is too dirty and the water temperature is too high.

4. The piston ring is not working properly, and the opening gap is too small to break the piston ring; The gap between heaven and earth is too small to make the piston ring stuck; Too much carbon deposits cause the piston ring to stick to the ring groove and lose its elasticity, resulting in fracture or gas leakage; Air leakage occurs due to excessive opening clearance or severe wear. The leakage of the gas destroys the lubricating oil film and makes the surface temperature too high. After the piston ring is broken, the fragments are easy to fall into the piston cylinder, causing the cylinder to pull and bite the cylinder.

If there is a situation where the car pulls the cylinder, it may be because you usually do not check the engine in time, so the engine may be leaking, or there is a lack of water, because it is not replenished in time, so the engine water temperature is too much. There is also a reason why the engine's oil is too low, resulting in a leak in the cylinder, including lubrication. There are also more pull cylinders.

At this point stop the engine and then check every cylinder. Make sure it's a carbon build-up problem in the cylinder and replace the gasoline. If all of the above are ruled out, then there is only a problem with the piston rings and piston pins of the car, and see if there is a break, or if there is a situation of falling off.

Some even get stuck in the ring groove or in other places. Then scratch the cylinder wall. Therefore, it is necessary to check the position of the piston frequently, and clean it to avoid some sand inflow, and then often wipe a little oil, if you don't know, three months or half a year to maintain the car, and then change the oil, so as to avoid wear and tear, there will be no cylinder pulling.

Pulling cylinder refers to the appearance of grooves of different depths on the cylinder wall along the direction of piston movement. The main factors are:

1. The piston ring and the inner surface of the cylinder have a very small area of sliding contact, resulting in high temperature, the melting between the ring and the cylinder wall, and the carbide produced after cooling, which is very sharp and cuts the cylinder wall into a groove;

2. The filtration effect of the filter is not good, and foreign dust and impurities cause the cylinder to be pulled;

3. The piston ring is made of inferior material, which is easy to break the ring and easily cause the cylinder to be pulled;

Pulling cylinders is one of the common faults of automobile engines. The so-called "pulling cylinder" means that the inner wall of the cylinder is drawn into a deep groove, and the friction pair of the piston, piston ring and cylinder wall loses tightness, resulting in the reduction of cylinder compression pressure and loss of power; The downward channeling of the combustible mixture increases the pressure of the crankcase, which will cause the crankcase ** in serious cases; The lubricating oil is channeled into the cylinder, causing the phenomenon of burning oil; Smoke from the exhaust pipe is severe; Abnormal engine noise; The engine does not work properly or even stalls. The main causes of engine pull cylinder failure in automobiles are:

1. The engine overheating is caused by leakage and lack of water, and the engine is not replenished in time;

2. The piston ring is broken and the cylinder wall is scratched;

3. The piston pin clamp falls off and scratches the cylinder wall;

4. The piston ring is stuck in the ring groove due to carbon deposition and loses its sealing effect;

5. The piston pin goes out and scratches the cylinder wall;

6. Foreign matter enters the cylinder;

7. The gap between the piston and the cylinder wall is too small;

8. The piston pin is assembled too tightly, causing the piston to deform;

9. The piston is seriously deformed or the roof is melted;

10. The engine runs at high speed or overload for a long time.