After replacing the cylinder head gasket, the valves will not make a ticking sound. Reasons for abnormal valve noise in cars: Due to engine oil viscosity being either too thick or too thin. If the oil viscosity is too thick, it directly affects the normal operation of the hydraulic lifters (requiring greater resistance to overcome), causing the oil to fail to keep up, thus resulting in valve noise. If the oil viscosity is too thin, it cannot provide adequate lubrication, leading to severe engine wear over time. Additionally, reduced oil pressure can cause valve noise. Therefore, when adding engine oil, it is essential to pay attention to the oil's viscosity. Classification and advantages of cylinder head gaskets: Metal-asbestos gaskets use asbestos as the base, covered with copper or steel sheets. Alternatively, woven steel wire or perforated steel plates serve as the framework, or metal rings are added around the cylinder holes to enhance strength. The advantage is lower cost, but the strength is relatively poor. Since asbestos is carcinogenic to humans, its use has been discontinued in developed countries. Metal gaskets are made from a single piece of smooth steel plate, with elastic ridges at the sealing points, relying on the elasticity of the ridges and heat-resistant sealant for sealing. They are widely used abroad. The advantages are high strength and effective sealing, but the cost is higher.
