What Does Cylinder Topping Mean?

[DelMaya]

In automotive engines, cylinder topping refers to the detachment of the timing chain or belt, or the fracture of the crankshaft pin. The causes of cylinder topping are as follows: 1. The timing belt has been in operation for too long, exceeding its service life, or the tension adjustment device of the timing belt fails, resulting in a gap and looseness between the timing belt and the timing gear, leading to cylinder topping. 2. Incompressible substances enter the cylinder, such as water or screws. 3. Some car owners use poor-quality oil products (engine oil, gasoline, certain maintenance products), which can solidify near the valve stem after the engine is turned off, causing the valve to stick when the engine is cold and resulting in valve damage upon startup.