Is Replacing the Crankshaft Considered an Engine Overhaul?

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Replacing the crankshaft is considered an engine overhaul. Below are relevant details about engine overhauls: Introduction: A major engine overhaul for automobiles primarily includes replacing components such as valves, pistons, cylinder liners, or performing cylinder boring and crankshaft grinding. According to the standards of most 4S shops, it generally requires replacing four sets of components: pistons, piston rings, valves, valve oil seals, valve guides, crankshaft bearings, and connecting rod bearings. Maintenance Notes: Remove sludge from the throttle body. The formation of sludge in the throttle body can be attributed to various factors, including carbon deposits from exhaust gases of fuel combustion accumulating in the throttle body, as well as residues from impurities not filtered by the air cleaner. Excessive sludge can cause air intake resistance, leading to increased fuel consumption. Clean carbon deposits from the fuel injectors. Carbon deposits easily form in the combustion chamber, which can result in difficulty starting the engine. Carbon deposits in the fuel injectors can also lead to clogged fuel passages, distorted fuel injection, poor atomization, and naturally increased fuel consumption.