Can the car still run after repairing the valve lift?
2 Answers
Car can still run after repairing the valve lift. Here are the relevant introductions: 1. Damage of the intake valve: If the intake valve is damaged, the continued operation of the engine will cause the push rod to bend or fall off, and the intake valve will not work. This cylinder will form a momentary vacuum working state during the intake stroke, thus affecting the engine power or even causing cylinder scoring. 2. Exhaust valve failure: If it is an exhaust valve failure, there will be a serious power bounce phenomenon, or even the burning gas will rush back from the intake pipe; the valve being lifted refers to the damage caused by the piston hitting the valve during the engine's operation. The valve snap ring (pin) is damaged, broken, or falls off. In severe cases, the piston may rupture, the connecting rod may bend, the cylinder barrel may rupture, and the cylinder head may be scrapped.
After the last repair of the valve tappets, I specifically consulted the experienced mechanic. He said that as long as the operation is performed according to the specifications, the car can run normally. The key is to recalibrate the valve clearance after replacing the parts, and it's best to personally measure the data with a feeler gauge when the engine is cold. After the repair, I deliberately ran a 300-kilometer break-in period, changed the oil more frequently, and listened to the engine sound every day before cold starts. So far, I've driven over 10,000 kilometers, and there's been no drop in fuel consumption or power. However, the mechanic reminded me to avoid long-term low-speed driving and to regularly check for oil leakage from the valve cover gasket. To be honest, after the repair, the car runs even quieter on the highway, with the valve ticking sound completely gone. The only thing to note is to use cleaning-type engine oil for the first three maintenance services.
