Do you observe some smoke or oil stains on the exhaust of your BMW? Could the crankcase ventilation valve be responsible for this issue? Every BMW owner desires their car to remain as reliable and efficient as it was when it was brand new, but the fact is that no matter how well a car is constructed, it can always develop some problems as it ages. One of the most neglected but highly important systems is the crankcase ventilation valve, or the CCV for short. This part is very important as it is responsible for controlling pressure within the crankcase and keeping oil fumes out of your engine.
If you have a faulty CCV, you are likely to encounter various problems in terms of performance. But here is the flip side: a failing CCV doesn’t necessarily translate to having to spend a lot of money and time to fix it. Below is a detailed explanation of what makes CCV fail and some possible remedies that will assist you in restoring your BMW to its best form.
What Causes a BMW’s Crankcase Ventilation Valve to Fail?
- Carbon and Oil Accumulation: In the long run, oil fumes, carbon, and sludge may accumulate in the ventilation valve and the hoses, restricting the free flow of air. This results in pressure build up in the crankcase, which leads to leakages and other problems that affect the engine.
- Aging and Wear: Like any other mechanical part, the CCV is prone to wearing out with time. If your BMW has high mileage, the rubber diaphragms inside the valve can become brittle and crack, causing vacuum leaks.
- Cold Weather Concerns: BMW drivers in snowy regions of the world are likely to encounter CCV failure. During winter, moisture in the system can freeze and cause the valve to become blocked, leading to oil leakage or an engine that will not start.
- Using the Wrong Oil: BMW engines are designed to operate on high-quality synthetic oil, and using the wrong oil is one of the blunders that some drivers make. If you decide to use low-grade oil, it will result in the formation of excessive sludge that will clog the CCV and consequently reduce its durability.
Quick Fixes For A Faulty BMW Crankcase Ventilation Valve
- Check the Ventilation System: If the CCV is only partially blocked, then you may be able to solve the problem by cleaning the ventilation system. Take off the valve and hoses and clean them with a carbon cleaner or a degreaser so that you can get rid of the deposits. This may help to temporarily fix the issues with the airflow.
- Check and Replace Hoses: The hoses that are connected to the CCV may degrade and develop cracks that cause vacuum leaks. If you observe that hoses have become rigid or cracked, then you should change them as soon as possible so they can work correctly.
- Replace the Valve: If the CCV is fully blocked or damaged, then the only solution is to replace it. The good news is that this is not a very complex repair, and many BMW owners who are into DIY will be able to handle it on their own. It is always best, however, to find a BMW specialist who can replace it without complications.
- Use High Quality Synthetic Oil: To avoid future CCV issues, you should always use the recommended synthetic oil. This helps in minimizing the amount of sludge that accumulates and ensures that your ventilation system is always in good shape.
- Warm Up Your Engine in Cold Weather: If you reside in a chilly climate, it is wise to warm your engine for a few minutes before you start moving. This reduces the chances of moisture formation within the CCV system that can cause a restriction in airflow.
Come To Ultimate Bimmer Services If You Need Quick and Efficient CCV Repairs
Ultimate Bimmer Services is the best BMW repair service provider for car owners in Merrimack, NH and neighboring Amherst, Bedford, Manchester, and Hollis. If you notice a problem with the crankcase ventilation valve, our professional mechanics will determine whether it is necessary to clean or replace the CCV so that you can have a high performing engine. You should not neglect a faulty CCV because it can result in even more extensive problems in the engine and costly repair. Call us today to set up an appointment.
* BMW X3 Car image credit goes to: Different_Brian.
