How to Detect Engine Piston Slap Fault?
2 Answers
Engine piston slap phenomenon can be detected by examining the wear degree of pistons and cylinder walls. Generally, piston slap is accompanied by severe wear on pistons and cylinder walls, along with abnormal dull knocking sounds. Below are relevant explanations: 1. Cylinder and piston damage: If the piston slap is caused by wear of the car's cylinders, pistons, and rings, a major overhaul is required. 2. Poor atomization: If the piston slap results from poor engine atomization or excessively high fuel injection pressure, replacing or servicing the fuel injector may suffice. 3. Classification of engine block: The engine block mainly consists of the cylinder block, cylinder liner, cylinder head, and cylinder gasket, and can be categorized into general-type cylinder blocks, under-slung-type cylinder blocks, and tunnel-type cylinder blocks. To ensure the cylinder block operates properly under high temperatures, appropriate cooling for both the cylinder block and cylinder head is necessary. The part of the cylinder block lower section that connects to the crankshaft is called the crankcase.
Once while driving, my engine made a clicking sound, and I thought there might be a problem, so I began self-inspection. First, I started the engine and carefully listened to the sound source location. Knocking sounds are usually crisp, like metal colliding. Then, I used a mobile app to connect to the car's diagnostic port to read the fault codes, which sometimes indicate cylinder abnormalities. Next, I checked if the spark plugs were eroded or had too much carbon buildup, which requires using a wrench to remove and inspect them. If possible, measure the cylinder compression pressure to see if it's below the standard value. For prevention, I regularly change the oil and use high-quality gasoline to avoid excessive ignition advance angle. Daily maintenance can reduce 90% of the risk of engine knocking. If you really encounter a problem, don't ignore the warning signals.
