Do I need breathers on my valve covers?

09/05/2020 Off By admin

Do I need breathers on my valve covers?

Yes you do need something to vent the crankcase pressure or you’ll start noticing stuff like blown out intake end seals, leaky rear main seal, dipstick blown out of the tube, etc… A hi-performance engine has more crankcase pressure so more “breather” is needed.

Is a crankcase breather necessary?

The crankcase ventilation system works to relieve any pressure from the engine’s crankcase attributed to blow by gases by rerouting the gases back into the engine’s intake manifold to be consumed by the engine. This is necessary, as excessive crankcase pressures can cause oil leaks to form if allowed to build too high.

Why do some valve covers need breathers?

The thought behind the breather is that you are supposed to get more fresh air flow down into the crankcase from the valve cover. This increases the cycle of oil vapor flow out of the crankcase. The added fresh air displaces the oil vapors in the crankcase with the assistance from the IM vacuum sucking it out.

Do you need a PCV valve and a breather?

Whether it’s in the form of a simple breather, or a more effective PCV system, you need a way to vent blowby gases inherently generated by a running engine. It uses engine vacuum through a metered valve, the PCV valve, to draw crankcase vapors back into the intake manifold to be burned in the combustion process.

Do valve covers add horsepower?

As the name implies, a valve cover is just a cover; its function is to protect the innards from the outside elements. It has no direct impact on engine performance unless the original valve cover was damaged or cracked to begin with.

Do valve covers matter?

When it comes to engine parts, they don’t get much more basic than the valve covers. Valve covers are not under any stress so historically they’ve been made out of simple stamped steel. But like anything, the more serious the engine gets, the more design changes may be needed in the valve covers.

What happens if you drive without a PCV valve?

If you need to drive a couple miles to get the parts needed then plug the vacuum side of PCV line and it may be okay to drive a short distance since running longer than this may cause the pressure to build up in the crankcase and cause oil leaks and engine will run lean or rich without a properly functioning PCV system …

Does it matter which valve cover has the PCV valve?

The PCV system is going to pull vapors out no matter if it’s in the front, rear, or side. As long as your system is in good working order, baffle installed, it doesn’t make a difference.

Can a bad valve cover gasket cause loss of power?

When this occurs, the gasket can lose its integrity and leak, potentially causing cosmetic issues like leaking oil, or drivability problems and reduced engine performance. If not replaced by an ASE certified mechanic in time, a bad valve cover gasket can lead to complete engine failure.