How Does Engine Piston Slap Occur?

[ArabellaLee]

Engine piston slap occurs due to the following reasons: 1. Bent or twisted engine connecting rod; 2. Excessive carbon deposits in the engine; 3. Poor engine lubrication conditions; 4. High cylinder pressure at high speeds. Solutions for engine piston slap: 1. If the knocking sound disappears after the car starts and the temperature rises, you can continue driving; 2. If the knocking sound persists and becomes more noticeable after the engine reaches normal temperature, the owner should stop and inspect the vehicle promptly to prevent traffic accidents; 3. After removing the cylinder head and extracting the piston, if severe cylinder ovality, scoring, or excessive clearance between the piston and cylinder is found, replacement is necessary—replace the cylinder liner, piston, and piston rings; 4. If the connecting rod is found to be deformed, it should be replaced as much as possible.