What Does Cylinder Topping Mean?
1 Answers
Cylinder topping refers to the situation where the connecting rod becomes excessively long due to excessive clearance in the connecting rod, causing it to hit the engine cylinder when the engine is running. Causes of engine cylinder topping: Broken spring: The intake or exhaust valve spring breaks, causing the valve to fall into the cylinder; it may also be due to hard objects falling into the combustion chamber. Excessive gasket thickness: During an overhaul, the connecting rod bearing replacement is too thick, or the gasket is too thick; or the piston geometric dimensions do not meet the requirements. Cylinder gasket failure: Frequent cylinder gasket failures can damage the cylinder block surface, and excessive repair can cause the piston to exceed the cylinder block surface when it reaches the top dead center, leading to cylinder topping. Poor fuel quality: The cause of engine cylinder topping may be the use of low-quality fuel by the owner, which causes the fuel to solidify near the valve stem after the engine is turned off, resulting in the valve sticking when the engine is cold and causing cylinder topping upon startup.