Do you know that there are so many small components in your BMW’s engine that… The post The Impact of a Faulty Crankcase Vent Valve on Your BMW’s Engine appeared first on Tanner Motors.
Do you know that there are so many small components in your BMW’s engine that may cause issues like poor performance or even issues with oil consumption or potentially severe engine damage? A crankcase ventilation valve, or CCV or PCV valve as it is commonly referred to, is an important item that maintains the smooth working of your engine. Its primary task is to control the return of gases from the engine’s crankcase to the intake manifold. These gases are produced during combustion and may contain undesirable emissions such as oil vapor and unburned fuel. If not regulated by the CCV, the gases can build up pressure in the crankcase or be vented out, which is both dangerous and uneconomical.
How a Defective CCV Can Damage Your Engine
- Increased Engine Wear: A faulty CCV lets undesirable gases build up in the crankcase and raises pressure, polluting the engine oil. The impure oil cannot provide smooth lubrication between the rubbing surfaces in the engine, such as pistons, bearings, and cylinders.
- Vacuum Leaks and Air-Fuel Imbalance: A damaged CCV can cause the formation of vacuum leaks that affect the delicate mix of air and fuel needed for efficient engine operation. Such imbalance can cause engine misfire, low fuel economy, rough running, and low output power, which will impact your driving style.
- Oil Contamination and Sludge Buildup: When the CCV fails, combustion gases and debris combine with the engine oil, contaminating it. In the long run, this sludge tends to block oil passages and reduce lubricant circulation. This not only increases friction but also potentially causes engine damage and failure.
- Increased Harmful Emissions: A bad CCV will discharge unburned fuel and oil vapor into the environment through the exhaust system. As a result, more emissions are produced, and if your car fails emission tests during inspection, it could mean some penalties or restrictions.
Preventing PCV Valve Issues
While every auto part is not designed to provide lifelong service, proper care can help your BMW’s Positive Crankcase Ventilation (PCV) valve last longer than most cars on the road. By following these preventative measures, you can reduce the risk of PCV valve failure and avoid costly repairs:
- Regular Maintenance: It is important to practice routine oil changes and check-ups, as sludge buildup is the main reason for PCV valve problems. Clean oil also assists in guaranteeing that the valve is running appropriately with not much chance of clogging or failure. A BMW should be serviced as recommended, and while doing so, have a mechanic check the PCV valve.
- Use High-Quality Engine Oil: The type and quality of oil you use are critical determinants of your engine’s performance and the lifespan of parts such as the PCV valve. They also have the potential to create a residue when not of high enough quality or incorrectly specified for the valve. Only use engine oil that is BMW recommended and according to the owner’s manual, and for even better oil protection, go for synthetic oils.
- Monitor for Symptoms of PCV Valve Issues: Some of the most common signs to look out for include cases where the car consumes a lot of oil, rough running, or any unusual noises that the engine might produce. It should be checked early enough to prevent them from becoming major problems. A faulty PCV valve may give certain signals that should not be overlooked. This means that you should notice any change in your car’s performance and seek a professional’s opinion on the matter.
Why You Should Seek Our Services for BMW Repair In Phoenix
At Tanner Motors, located in Phoenix, AZ, 
we fully understand the requirements for BMWs and other European cars. We staff the best mechanics who will diagnose crankcase ventilation valve problems and ensure that the engine is performing as it should. If you are experiencing any of the symptoms pointed out above, do not wait until the situation worsens. Contact Tanner Motors today to book an appointment for an inspection or for your car to be repaired. Let us help you maintain your BMW on the road for miles ahead.
* Black BMW M4 Car image credit goes to: Brandon Woyshnis.
The post The Impact of a Faulty Crankcase Vent Valve on Your BMW’s Engine appeared first on Tanner Motors.
