
The reason why the brake fluid cap should not be over-tightened is that all threaded sealing structures should not be tightened with a force exceeding the specified torque. It only needs to be tightened enough to prevent air leakage. Applying excessive force can lead to thread wear or even structural damage, compromising the sealing effectiveness. Below is an introduction to brake fluid-related information: 1. Function: Brake fluid, also known as hydraulic brake fluid, is the liquid that transmits force in the braking system. It is a synthetic oil composed of various additives and has strong water-absorbing properties. 2. Classification: According to the American Petroleum Institute standards, brake fluids are categorized into three types: DOT3, DOT4, and DOT5.1. DOT3 is typically an alcohol-ether type brake fluid, while DOT4 and DOT5 are ester-based and silicone-based, respectively. 3. : Regular maintenance of brake fluid is essential. Generally, the maintenance cycle for brake fluid is time-based, with a replacement interval of two years. Some manufacturers specify two years or 40,000 kilometers, whichever comes first.


