How to Deal with Engine Piston Slap in Cars?

[OSteven]

Car engine piston slap can be addressed by: 1. Fixing the engine speed at the position where the knocking is loudest and conducting a cylinder cut-off test; 2. Checking for bending or twisting deformation of the connecting rod; 3. Removing the fuel injector, adding a small amount of engine oil into the cylinder through its installation hole, and cranking the diesel engine several times with the starter to ensure the piston and cylinder wall are fully lubricated before starting the engine. The causes of engine piston slap include: 1. Excessive wear and excessive clearance between the piston and cylinder; 2. Incorrect piston orientation or piston deformation; 3. Poor lubrication of the cylinder wall; 4. Bending or twisting deformation of the connecting rod; 5. Clogged lubrication oil passages; 6. Severe carbon buildup in the combustion chamber.