BMW eccentric shaft is a key engine component. It serves the main purpose of regulating the performance and efficiency of engine by controlling opening and closing of valves. Eccentric shafts are often used in variable valve timing systems, and are also employed on some sports car models for optimizing power output and fuel economy.
Functions of an eccentric shaft:
1. Valve control: By changing the lift and controlling the opening time of valves, it enables precise control of air inflow, thereby optimizing engine performance.
2. Improve fuel consumption: It adjusts the working status of valves under different operation conditions to improve fuel efficiency.
3. Boost power: It increases the valve opening height when needed to achieve higher power output of the engine.
Common symptoms of a failed BMW eccentric shaft:
1. Insufficient power: The vehicle responds slowly or weakly when the accelerator is pressed.
2. Abnormal noise of the engine: Clicking or friction sounds can be heard, especially at high RPMs.
3. Increased fuel consumption: When engine efficiency decreases, an increase in fuel consumption often occurs as a result.
4. Abnormal emissions: There are excessive exhaust emissions, and odors may be generated.
5. Unstable idle speed: The engine RPM fluctuates and the vehicle vibrates in idle status.
6. Fault indicator on: The engine fault indicator (MIL) lights up, indicating the need for inspection.
Causes of eccentric shaft failures:
1. Wear: Prolonged operation leads to normal wear.
2. Insufficient lubrication: Inferior lubricating oil or blocked oil circuit can result in poor lubrication.
3. Overloaded operation: The vehicle is operated in overloaded conditions or beyond its designed load.
4. Manufacturing defects: Material issues or design defects in initial production can lead to failures.
5. Improper maintenance: Improper repairs can damage components.
Advantages of vika eccentric shaft repair kit:
1. The top cylinder motor is a product from Johnson Electric. The worm is subject to hardness treatment that leads to higher hardness and wear resistance.
2. Forged steel materials are used to ensure uniform hardness of vika eccentric shaft.
