What is the problem with the PCV valve on a Subaru?

The PCV (Positive Crankcase Ventilation) valve is an important component in a Subaru’s engine. It is part of the emissions control system and helps regulate the pressure and vapor being released from the crankcase. The PCV valve allows the engine to breathe and removes harmful oil vapors from being released into the atmosphere.
When the PCV valve is not functioning properly, it can cause a range of issues. Here are some common symptoms of a bad PCV valve on a Subaru:
1. Excessive oil consumption: A faulty PCV valve can lead to increased oil consumption in the engine.
2. Oil leaks: A blocked or malfunctioning PCV valve can cause oil leaks in the engine.
3. Smoke from the exhaust: If the PCV valve or the hoses connected to it are blocked, oil can be pushed up into the combustion chambers, resulting in smoke coming out of the exhaust pipe.
4. Rough acceleration: A bad PCV valve can disrupt the air and fuel mixture fed to the engine, leading to rough acceleration at high and low RPMs.
If the center of the PCV valve is missing, as mentioned in one of the search results, it is likely that the valve is not functioning properly. Replacing the PCV valve should help resolve the issue. However, it is important to note that a faulty PCV valve may have caused other problems in the engine. It is recommended to have further repairs and checks done to ensure that any potential issues caused by the faulty PCV valve are addressed.
Replacing a PCV valve on a Subaru should not be a difficult task. There are resources available, such as videos and guides, that provide instructions on how to replace the PCV valve yourself. It is always a good idea to consult the vehicle’s manual or seek professional assistance if you are unsure about the process .
In conclusion, a faulty PCV valve on a Subaru can lead to various issues such as excessive oil consumption, oil leaks, smoke from the exhaust, and rough acceleration. Replacing the PCV valve should help resolve these problems, but it is important to have further checks and repairs done to address any potential issues caused by the faulty valve.

What are the symptoms of a failing PCV valve?

Some of the most common signs of PCV valve failure include a rough engine idle, rich or lean fuel/air mixture, whining noises coming from the engine when accelerating, and poor fuel economy.

When should I replace my PCV valve Subaru?

Unlike changing your battery or oil, there is no particular time frame to replace your PCV valve. As long as a PCV valve is functioning properly, you do not need to replace it. However, they are subject to damage due to a lot of blow-by gases traveling through them which can sludge the valve up.

What is the lifespan of a PCV valve?

between 20,000 and 50,000
There isn’t a specific lifespan for a PCV valve but you can usually plan to replace it anywhere between 20,000 and 50,000 of driving. Similar to many other parts of your car, regular maintenance will extend the life of your PCV valve while neglecting regular oil changes and signs of trouble will shorten it.

How do I know if my Subaru PCV valve is bad?

One very common sign of a bad PCV valve is a whistling or hissing sound coming from the engine. This can indicate that there is a slight blockage in the PCV valve. A Check Engine warning light can be another sign that you need to replace a PCV valve because the PCV valve impacts vehicle performance and emissions.

What does the PCV valve do on a Subaru?

Your vehicle’s crankcase holds your engine’s motor oil and is located at the bottom of your vehicle’s engine. The PCV valve is a one-way valve attached to the crankcase of your car’s engine and removes unwanted gases from the crankcase. It produces gases when your engine burns fuel.

Can a bad PCV valve ruin an engine?

PCV stands for positive crankcase ventilation, and it’s a system that is crucial for the proper functioning of most modern engines, whether diesel or gas. A PCV valve that does not function properly can lead to decreased performance and even engine damage.

How much is a PCV valve for a Subaru?

The average cost for a PCV valve replacement is $186 to $220.

Can you still drive with a bad PCV valve?

You should not continue to drive with a bad PCV valve.
A faulty PCV valve can cause additional (potentially costly) problems, such as blown-out gaskets and increased oil consumption.

Can I drive with a bad PCV valve?

The PCV valve is easily one of the most important parts of your car, and although it is possible to continue to operate your car with a bad valve, it is not recommended as it can corrode your car’s engine over time.

Will a bad PCV valve throw a code?

If the device detects a problem with the PCV system, it will turn on the check engine light and store a corresponding diagnostic trouble code in memory. A stuck-open PCV valve can also disrupt the air-fuel mixture and cause misfires that trigger the check engine light.