VANOS is an acronym for VAriable NOckenwellen Steuerung, which is German for variable camshaft control. The VANOS system is a critical component of BMW engines that allows for variable valve timing, which enhances the engine’s power, efficiency, and overall performance. Unfortunately, the VANOS system can develop issues over time that can negatively affect the engine’s performance.
How Does the VANOS System Work?
The VANOS system works by using solenoid valves to control oil pressure to a hydraulic actuator, which adjusts the position of the camshaft. The system uses sensors to determine the engine’s current operating conditions and adjusts the camshaft’s position accordingly. The VANOS system can adjust the intake & exhaust valve timing separately, which allows for greater flexibility in optimizing engine performance.
Common Issues with the VANOS System
The VANOS system can develop issues that can negatively affect the engine’s performance. Some common issues with the VANOS system include the following:
One of the most common issues with the VANOS system is complete failure. If the VANOS system fails, the engine may experience a loss of power, reduced fuel efficiency, or difficulty starting. This can be caused by a number of factors, such as;
- Faulty solenoid valve: this can cause the VANOS system to fail because it controls the oil flow to the hydraulic actuator. If the solenoid valve is faulty, it may not open or close properly, which can cause a loss of oil pressure and VANOS failure.
- Clogged oil passage: The oil passages in the VANOS system are small and can become clogged over time, which can cause a loss of oil pressure and VANOS failure.
- Worn actuator piston: The actuator piston is a critical component of the VANOS system and can wear over time, causing the system to fail.
Another common issue with the VANOS system is noise. If you hear a ticking or rattling noise from the engine, it could be a sign of a problem with the VANOS system.
VANOS Oil Leaks
Oil leaks are another common issue with the VANOS system. If you notice oil leaking from the VANOS system, it could be a sign of a faulty gasket or seal. The gaskets and seals in the VANOS system are exposed to high temperatures and can wear over time, causing leaks.
A cracked or damaged VANOS cover can also cause oil leaks in the system. The VANOS cover is a critical component of the system and can crack or become damaged over time. In addition, oil leaks can be caused by a damaged oil line in the VANOS system. If the oil line is damaged, oil can leak out and cause issues.
VANOS Sensor Issues
Finally, VANOS sensor issues can cause various problems with the system, and the engine may experience a loss of power or reduced fuel efficiency. This issue is usually caused by a faulty sensor or a wiring issue.
Faulty sensors can make the VANOS system begin to operate in an improper manner, and if the sensors are not working correctly, they may not be able to accurately measure the engine’s conditions, which can cause the system to make incorrect adjustments. If the wiring is damaged or not connected properly, the sensors may not work correctly, which can cause unpleasant issues with the system.
When you begin to encounter any of the issues listed above in your BMW, such as oil leaks, loss of power, reduced fuel efficiency, or difficulty starting. It is important to seek the help of a professional to assist you in diagnosing and fixing the issue in order to avoid any further damage to your car or SUV.
JCL Automotive Will Fix Any Issues In Your BMW
If you’re experiencing issues with your BMW’s VANOS system or any other car problems, JCL Automotive is here to help you fix the issue. Our team of experienced technicians is dedicated to providing high-quality repairs and maintenance services to residents in Hellertown, PA, and the surrounding areas. We use the latest diagnostic equipment and technology to accurately diagnose and fix any issues in your car. Don’t hesitate to book an appointment with us today to get your car back on the road in top condition.
* Grey BMW M5 Car image credit goes to: Brandon Woyshnis.