Does Engine Knocking Require Overhaul?
2 Answers
If the engine knocking is caused by wear of the cylinder, piston, or rings, an overhaul is necessary. If the knocking is due to poor engine atomization or excessively high fuel injection pressure, replacing or cleaning the fuel injectors may suffice. The engine block serves as the framework of the engine, providing the installation base for various mechanisms and systems. It houses all major engine components and bears various loads. More details are as follows: 1. Cylinder Block Introduction: The engine block mainly consists of the cylinder block, cylinder liner, cylinder head, and cylinder gasket. The cylinder block must have sufficient strength and stiffness and can be classified into general-type, crossflow-type, and tunnel-type cylinder blocks. To ensure proper operation under high temperatures, appropriate cooling is required for the cylinder block and cylinder head. 2. Crankshaft Case Introduction: The lower part of the cylinder block that connects to the crankshaft is called the crankshaft case, which can be divided into the upper and lower crankshaft cases. The cylinder head is mounted on top of the cylinder block and must withstand significant thermal and mechanical loads.
As a long-time driver, I've seen too many cases of engine knocking. That sound is like a small hammer hitting the cylinder block, which can be quite alarming. It's usually caused by abnormal noise due to wear between the piston and cylinder wall. Don't rush into a major overhaul—first, check simple things like whether the engine oil is too thin or insufficient. Switching to the right oil can alleviate many issues. If the noise persists, you may need to inspect the oil pump or ignition system for problems. For mild knocking, you can try using additives or replacing piston rings, which are lower-cost solutions. However, in cases of severe wear, a major overhaul becomes unavoidable, involving engine disassembly and part replacements, which can be shockingly expensive. I remind everyone to pay attention to engine temperature to prevent overheating, perform regular maintenance and oil changes, and address issues early to save a lot of trouble and money. Driving safety comes first—don't let small problems turn into major disasters.
