Is Replacing the Camshaft Considered a Major Overhaul?

[AngeloLee]

Replacing the camshaft in a car is considered a major overhaul and has a certain impact on the vehicle's sealing performance. The details are as follows: Function of the Camshaft: The camshaft is located on the cylinder head, which is connected to the cylinder block. It serves as a mechanical component to seal grease (oil is the most common liquid substance in the transmission system and generally refers to liquid substances). It isolates the parts requiring lubrication in the transmission system from the output components, preventing lubricant leakage. Materials Used for Oil Seals: Nitrile rubber and fluororubber materials are widely used for oil seals. The former is cost-effective but has limitations in temperature resistance and sealing performance. The latter offers improved temperature resistance and sealing but comes at a higher cost. It still shares some common drawbacks with ordinary rubber materials, such as poor wear resistance, short service life, and high sensitivity to shaft eccentricity, making leakage still relatively common.