Does your BMW exhibit any engine performance problems or odd sounds? If yes, then the problem might be from the crankcase ventilation valve. When this BMW component fails to work properly, it can transform your trip from being pleasant into an inconvenience. However, there is no need to fret because we will show you how to deal with this component. Let’s look at what a crankcase ventilation valve is, how it operates, and what to do when it malfunctions so that you can keep your BMW in good condition.

What Is Crankcase Ventilation Valve and How Does It Work?

The crankcase ventilation valve, also known by the abbreviation PCV (Positive Crankcase Ventilation) is a small but mighty part of your BMW’s engine. Its main function is to regulate the amount of gasses and vapors that are accumulating inside the engine’s crankcase.

When the engine of your car is running, the air, fuel, and combustion gasses get into the crankcase through the gaps and clearances in the components. These gasses, together with moisture and other byproducts of combustion, accumulate over time inside the crankcase, causing increased pressure that can damage engine components if not properly handled.

This is where the PCV valve comes in. This small but indispensable component functions as a vent, permitting the buildup of gasses and vapors inside the crankcase to be vented out and returned back into the engine’s intake system. The PCV valve performs the function of stopping the pressure drift, lowering emissions, and maintaining the normal operation of an engine and fuel consumption. Besides venting gasses and vapors, the PCV valve also stops oil from being drawn into the intake system of the engine which could possibly result in fouled spark plugs, a decrease in engine performance, and high emissions.

How Can You Tackle This Problem?

  • Diagnose the Problem: If you think your BMW’s crankcase ventilation system is not functioning properly, the first thing you have to do is to diagnose it to be sure. Pay attention to the most common indicators such as the check engine light turning on, mechanical issues, and excess oil consumption. These symptoms may be signs of a PCV valve problem, so it is a good idea to allow a qualified mechanic to carry out a diagnostic check first.
  • Inspect and Clean the Valve: Most times, a defective PCV valve can be due to the deposition of dirt, debris, or oil. Take off the valve and subject it to a thorough scan to find out if there is any contamination. The next thing is to clean it properly by using solvent and a soft brush to clear away the blockages and contaminations. Make sure there are no foreign objects and that all parts are secured correctly while reinstalling the valve.
  • Replace the Valve: If the valve is clean and the issue still persists, you might have to replace it with a new valve. Refer to your BMW’s owner’s manual, or work with a reliable mechanic to identify the right replacement part and installation procedure. Make sure that you use a genuine or high-quality aftermarket replacement valve to ensure proper fit and durability.
  • Seek Professional Help: Even if you have been a DIYer for years, it is better to consult a BMW specialist or well-trained mechanic for your PCV malfunction. They have the tools and skills to correctly diagnose the fault and then initiate the repairs to ensure that your BMW engine is at its best.

Visit Our Garage In Algonquin Now To Experience Our Quality Repairs

At Francen and Son Foreign Car, we BMW Crankcase Ventilation Valve Check are the leading auto repair shop serving BMW owners in and around Algonquin, IL. We have been consistent with offering exceptional customer service and top-notch repairs since 1989. Our mechanics will not only get your BMW working the way it should, but they’ll also ensure that you have a great overall experience.

Whether you drive a European luxury vehicle or an imported Japanese model, we have the knowledge and expertise to handle all your repair needs. If you need help with tackling BMW crankcase ventilation valve issues, we are here for you every step of the way. Book an appointment with us now and experience the difference firsthand.

* Black BMW M4 Car image credit goes to: Brandon Woyshnis.

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