Your PCV (Positive Crankcase Ventilation) valve plays an imperative role in the functioning of your vehicle’s PCV system. This is what works within your engine to prevent unwanted gases, known as blow by, (hailing from the combustion chambers) from building up in the crankcase. The crankcase is not designed to accommodate for the high pressure caused by the accumulation of these gases. Luckily, the PCV system is able to filter excess gas through the PCV valve and out into the engine’s intake manifold, in order to be recycled.
The PCV valve is vital towards ensuring that your engine is kept running smoothly. That said, a failed PCV valve can have a number of negative effects upon your vehicle. In this article, we’ll be going through some of the most common symptoms of a bad PCV valve. What’s more, we’ll be explaining how you can avoid having to deal with any high costs or complicated repair work that may result from neglecting PCV valve issues.
What Are the Symptoms?
Check Engine Light
Your check engine light may turn on for a variety of reasons regarding your engine, but you shouldn’t rule out the possibility of a failed PCV valve either. A diagnostic trouble code is produced in response to the issue, which is stored within the engine control unit. This is only able to be read by specific technology that your auto technician possesses. So, if your check engine light does come on, be sure to bring your vehicle to your local mechanic to have the problem diagnosed and rectified as soon as possible.
No Rattling Noise
Another way to check the state of your PCV valve is by checking the spring-loaded device within the valve. If you carefully remove the PCV valve from your vehicle and shake it, it should produce a rattling noise. If it doesn’t, then this could be a possible indicator that you need to have your valve replaced. Keep in mind that this simple test may not be enough to disclose the whole picture. So, if you’re experiencing any other symptoms but your PCV continues to rattle when shaken, you should still bring your vehicle to a mechanic for inspection.
Increased Fuel Consumption
Issues with your PCV valve may also result in decreased fuel economy, as the vacuum that controls the valve’s ability to suction out the blow by may be unable to accurately gauge the amount of fuel that the engine requires. An engine requires a mixture of fuel and air that is very precise. Having leaky or broken PCV valves can result in there being too much fuel in the mixture in relation to air, or too much air in relation to fuel. This is what results in the increase in fuel consumption.
When a PCV valve becomes clogged or stuck, it will be unable to serve its purpose and henceforth, pressure will be allowed to build up in the crankcase. As a result of this pressure, oil consumption will also increase as oil leaks occur through the seals. This can also cause lack of air flow in the engine, which results in the buildup of damaging sludge.
When you have a fuel mixture that is either too high in fuel or too high in air, it can clog the fuel pumps or injectors, which can subsequently result in an engine misfire. Signs of a misfire include rough acceleration or idling, vibrations or strange noises coming from your engine.
How Can I Avoid Engine Damage?
If you’ve experienced any of the aforementioned symptoms, it’s important for you to seek out an experienced auto technician right away. Faults with your PCV valve may start out as merely minor issues, however when left unchecked, they have the potential to cause serious damage to your engine. Of course, an engine is a highly expensive component to repair, let alone replace. As such, it’s vital for you to address any concerns right away by bringing your vehicle in for a check-up as soon as you notice the issue. Moreover, it’s recommended for you to stick to your vehicle’s scheduled servicing, as this is what will allow your mechanic to assess your vehicle and diagnose any minor problems before they get the chance to develop into major ones.
German Auto Meisters are the auto mechanic Perth drivers trust when they’re wanting only the best servicing for their luxury vehicle. Our skillful mechanics are well-versed in the maintenance and repair of prestigious European vehicle brands such as BMW, Mercedes-Benz, Alfa Romeo, Audi and more. What’s more, we always strive for 100% customer satisfaction, whilst keeping you informed every step of the way.