Back to all

PCV Valve: What Is It?

September 23, 2018

Most Grand Haven drivers know something about preventive maintenance on a vehicle. We know we should routinely replace the oil and wiper blades and other fluids. But have you heard of a PCV valve ? This little car part needs to be replaced regularly or it can cause some serious problems in your vehicle engine.

PCV stands for Positive Crankcase Ventilation. The crankcase holds your motor oil and is located at the bottom of your engine.

When fuel is burned in your engine, it produces waste gases that are mostly vented out through your exhaust system. But some of these gases push their way past the pistons and into the crankcase. There, these gases can mix with motor oil to produce oil sludge, which can damage vehicle engine parts through corrosion and by clogging engine passages. Grand Haven vehicle owners should be advised that if the engine is running at high speeds, these gases can also cause pressure inside the crankcase to build up. This pressure, in turn, can blow gaskets and damage seals, leading to oil leaks.

The waste gases that leave the engine are comprised of about 70% unburned fuel. They used to be vented off the crankcase into the atmosphere. But starting in 1964, laws mandated that these gases be recaptured. Manufacturers began installing PCV systems, which recycled the gases into the air intake system where they could be mixed with fuel and sent to the engine to be burned.

The PCV valve is a one-way valve attached to the crankcase. Waste gases exit the crankcase through the valve but cannot enter.

Over time, the waste gases leave deposits on the PCV valve that can gum it up. So it needs to be replaced occasionally. This is an inexpensive part of preventive maintenance that is often overlooked, but which can have very expensive consequences. It's good auto advice to keep this little valve clean and working well.

In order to maintain efficient circulation, the PCV system also has a breather tube that allows clean air to enter the crankcase. This air is usually filtered through the engine air filter. But some vehicles have a separate air filter for the breather tube called the breather element. If this is the case with your vehicle, proper maintenance of the PCV will include replacing this element. To find out whether your vehicle has this type of PCV system, check your owner's manual or ask your service advisor at Tuffy Grand Haven.

The PCV system reduces harmful vehicle emissions. The maintenance it requires is simple and inexpensive at Tuffy Grand Haven. A fouled or damaged PCV system can lead to serious engine damage for Grand Haven drivers.

Let's all learn to practice good car care. It's good for our wallets, and it's good for our Michigan environment.

Tuffy Grand Haven
435 N. Beacon Blvd.
Grand Haven , Michigan 49417
616.844.5557

More articles from Tuffy Grand Haven

A Bumpy Ride (Strut Assembly Replacement)

November 17, 2024

If youve noticed your vehicles ride has lately been bumpy or youre hearing strange noises when you drive over bumps, you may need new struts. The strut assembly is part of your vehicles suspension system thats used to absorb the irregularities on the surfaces you drive on. You have probably hea... More

Fuel for Thought

November 10, 2024

If you're like most people and drive a gasoline-powered vehicle, you need to be up to speed on its fuel-related components. They're pretty basic: the fuel, the fuel filter and the fuel pump. The fuel's the easy part. You probably gas up your vehicle yourself and, if you're like most drivers, pr... More

I Can See Clearly (Wiper Blade Replacement)

November 3, 2024

Warm weather can bring severe storms, and when the rain is coming down hard, that's one time you really need to be able to see as clearly as possible out your windshield. Having wiper blades that are fit for the job are important to maintain that safe view. Maybe you live in a climate where you ... More