Does engine knocking require an overhaul?
2 Answers
Engine knocking does not require an overhaul; it only needs the replacement of corresponding parts based on the specific cause. If the piston knocking continuously produces knocking sounds when the engine is hot, it should not be used further and requires factory repair. An engine is a machine that can convert other forms of energy into mechanical energy. The first external combustion engine was invented by R. Stirling of the UK (Scotland) and later improved by Watt into a steam engine. Engines can refer to both power-generating devices and the entire machine including the power unit (e.g., gasoline engines, aircraft engines). Their types include internal combustion engines (such as gasoline engines), external combustion engines (such as Stirling engines, steam engines), gas turbines (used in racing cars), and electric motors.
I recently encountered an engine knocking issue, and it really worried me at the time. As a hands-on car owner, I heard from my mechanic friend that knocking sounds like a ticking noise, often caused by using low-quality gasoline leading to detonation or improperly adjusted ignition timing. If the sound is minor, switching to higher-octane fuel or cleaning the fuel system can alleviate it; there's no need for an immediate major overhaul. However, if the sound is loud and frequent, it might indicate severe piston ring wear or internal damage, which would then require considering a disassembly for repair, costing a significant amount. In my case, switching to 98-octane fuel made the knocking disappear, saving me thousands. In summary, always check simple factors like fuel quality and spark plugs first before jumping to major repairs, which are both time-consuming and costly. Regular maintenance, including using fuel from reputable gas stations, can prevent many such issues.
