What Causes Engine Cylinder Scoring?
1 Answers
Engine cylinder scoring can be caused by: engine overheating due to leaks or water shortage in the cooling system that is not replenished in time; severe oil deficiency caused by engine oil leakage or excessive consumption; prolonged high-speed or overload operation leading to excessive temperature; deformation caused by improper assembly of piston pins or cylinder liners. Below are related explanations: 1. Definition of engine cylinder scoring: It refers to obvious longitudinal mechanical scratches and abrasions on the inner wall of the cylinder within the movement range of the piston rings. In severe cases, adhesive wear may occur, causing difficulties in engine starting or spontaneous stalling. 2. How long can an engine run with a misfiring cylinder? Although it is not recommended to continue driving once an engine has a misfiring cylinder to prevent greater wear or even life-threatening situations, if the vehicle's engine is a four-cylinder, a misfiring cylinder means only three cylinders may be working normally. At idle or low to medium speeds, as long as you avoid sudden acceleration, driving for about ten kilometers should not be a problem. 3. Symptoms of cylinder scoring: Reduced cylinder compression pressure and loss of power; increased crankcase pressure due to downward leakage of combustible mixture, which may cause crankcase explosion in severe cases; oil burning phenomenon caused by upward leakage of lubricating oil into the cylinder; severe smoke from the exhaust pipe; abnormal engine noise; engine malfunction or even stalling.
