If you're using a car made by BMW, it most definitely runs on the Vanos engine, popular for its valve timing system. BMW adopted the Vanos engine in 1993 to optimize the performance of their powerful engines. Since then, it has served BMW users for decades with how it positions intake and exhaust camshafts using oil pressure. However, should your Vanos engine start failing, how do you know where to look and what to do?
The Vanos system is also called the Vanos solenoid due to its design. The engine has a long coil of wire wrapped around it severally to control the amount of oil pressure applied. Unfortunately, this solenoid can become packed with dirt and debris, causing it to develop faults.
What Symptoms Are You to Look Out for in a Faulty BMW Vanos Solenoid?
No one will know your car better than you do as a driver. Therefore, you should always note the slightest change in what you deem normal for your car. With a Vanos engine, you want to watch out for the engine idling, fuel economy, engine codes, and hesitation, among others. When your Vanos engine starts developing faults, some symptoms you'll experience include the following:
- Poor/Rough Idling with Regular Hiccups
You should have your engine checked out when your car starts to idle poorly or loudly. Generally, you might encounter a rattling sound from loose Vanos gears. This symptom, also called the Vanos rattle, is common with Vanos engines.
- Engine Hesitation under Acceleration
When you start noticing your car does not want to accelerate as it formerly does, it's a symptom of a faulty Vanos solenoid. For example, you may get the feeling of stalling or that your engine wants to sputter. Another indicator is your car falling into limp mode under acceleration, the engine bogging under 3000rpm.
When you notice any of this, your engine is not getting the right amount of fuel, cannot disperse the exhaust, and should be checked out.
- Bad Fuel Economy
Generally, increased fuel consumption can be caused by many problems, and a failing Vanos solenoid is one of them. Keep track of your mileage and how often you're getting gas. If it's more than usual, it might be time to check your engine.
- Error Codes & Engine Light
Your engine light is a warning sign that should always be taken seriously, likewise an error code. So, when you observe an engine light on your dashboard or error codes starting with P1, P0, and 2A, get your engine checked.
How to Locate and Solve Vanos Problems?
Locating Vanos problems yourself should end with taking note of the symptoms. These symptoms are what you should report to a certified BMW specialist to help you check out the problems and fix them.
However, it is advisable to run regular maintenance by cleaning your solenoids before it runs into any problems. You can check for verified DIY videos and guides on the internet on how to clean your solenoids. Also, it's advisable to repair or change your Vanos solenoid at 70K mileage.
Conclusion
Pay attention to your BMW car engine, run regular maintenance, and consult a BMW specialist in the case of a problem.
About the authors
The CarAraC research team is composed of seasoned auto mechanics and automotive industry professionals, including individuals with advanced degrees and certifications in their field. Our team members boast prestigious credentials, reflecting their extensive knowledge and skills. These qualifications include: IMI: Institute of the Motor Industry, ASE-Certified Master Automobile Technicians; Coventry University, Graduate of MA in Automotive Journalism; Politecnico di Torino, Italy, MS Automotive Engineering; Ss. Cyril and Methodius University in Skopje, Mechanical University in Skopje; TOC Automotive College; DHA Suffa University, Department of Mechanical Engineering
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