How will the fuel economy and power performance of the vehicle be specifically affected if the Engine Crankcase Vent Valve is not replaced in time?

When the Engine Crankcase Vent Valve fails, the oil in the crankcase is more susceptible to contamination by combustion products, water vapor and other impurities. These contaminants will be deposited in the oil, forming sludge and carbon deposits, reducing the cleanliness and lubrication performance of the oil. The reduced lubrication efficiency of the oil will lead to increased friction between the internal parts of the engine, which in turn requires more fuel to overcome this additional resistance, thereby reducing fuel economy.
Another key function of the engine Engine Crankcase Vent Valve is to regulate the oil-gas balance in the crankcase. If the ventilation valve fails, the oil vapor may not be effectively separated and reintroduced into the combustion chamber for combustion, but directly discharged into the atmosphere or into the intake system. This not only wastes oil resources, but may also cause an imbalance in the mixture ratio of air and fuel entering the cylinder. A mixture ratio that is too rich or too lean will affect combustion efficiency, thereby reducing fuel economy.
The failure of the Engine Crankcase Vent Valve may also cause the pressure in the crankcase to increase, affecting the heat dissipation effect of the engine. High temperature environment will accelerate the oxidation and deterioration of the oil, while increasing the burden on the cooling system. In order to maintain the normal operating temperature of the engine, the cooling system may need to consume more energy to dissipate heat, which will also indirectly affect fuel economy.
After the ventilation valve fails, oil vapor and exhaust gas may continue to enter the intake system, causing the air filter, throttle and intake pipe to be contaminated and blocked. These pollutants will limit the flow of air and reduce the intake efficiency. Insufficient intake will directly affect the combustion process of the engine, resulting in a decrease in power output.
Failure of the ventilation valve may also cause uneven distribution of the oil-gas mixture in the combustion chamber, resulting in unstable combustion. In some cases, knocking may also occur (i.e., the fuel ignites before the spark plug ignites). Knocking will disrupt the normal working order of the engine, reduce power performance, and may cause damage to the engine.
As mentioned earlier, the failure of the ventilation valve will lead to oil contamination and reduced lubrication efficiency, which will in turn increase the wear of the internal mechanical parts of the engine. The gaps between worn parts such as pistons, cylinder walls, crankshafts, etc. will increase, resulting in reduced sealing performance and power loss. In addition, metal debris generated by wear may further contaminate the oil and lubrication system, forming a vicious cycle.
Timely replacement of the Engine Crankcase Vent Valve is essential to maintaining good fuel economy and power performance of the vehicle. Car owners should pay close attention to the working condition of the ventilation valve and perform regular inspections and replacements according to the recommended cycle of the vehicle manufacturer. At the same time, paying attention to maintaining the cleanliness and lubrication performance of the engine oil is also one of the important measures to improve fuel economy and power performance.