Q:

What happens when a PCV valve goes bad?

A:

Quick Answer

When a positive crankcase ventilation, or PCV, valve goes bad, the valve may be plugged and can cause sludge to build in the engine, as well as oil leaks. A PCV valve can also go bad when there is water inside of it caused by moisture contamination. In this instance, the PCV valve needs to be replaced.

  Know More

Full Answer

One way to tell that the PCV valve has gone bad is if the vehicle's check engine light turns on. It can also cause noise, such as a whistle or whining sound. In some cars, a bad PCV valve will cause oil to blow into the air filter.

PCV valves do age, and as they get older, sludge may cause them to stick in the open position. Fortunately, they are easy to replace once the location of attachment is found. They usually last about 50,000 to 80,000 miles before they need to be replaced, but a series of short trips can cause the valve to need replacement before the 50,000 to 80,000 mile mark is reached.

The PCV valve reduces blowby emissions from the engine of a vehicle. Their condition can easily be checked by shaking them to see if there is a rattling sound, or using a flow tester to test valve performance.

Learn more about Plumbing

Related Questions

  • Q:

    How do you determine what's causing your Volvo engine problems?

    A:

    To determine what is causing Volvo engine problems, check for presence of any sludge, look for leaks in the engine, examine the color of the oil and analyze the engine light. Other points to consider include strange sounds, a blocked air filter and the oil level.

    Full Answer >
    Filed Under:
  • Q:

    What is a sluice valve?

    A:

    According to Reference.com, a sluice valve is a type of gate that is designed to control the flow of a fluid passing through it. It works by lifting a round or rectangular wedge out of the path of the fluid.

    Full Answer >
    Filed Under:
  • Q:

    What is a Studor valve?

    A:

    A Studor valve is an air admittance valve used to replace complex and expensive open pipe vent systems that penetrate roofs in buildings. These vents are used to allow air to enter the vent and plumbing drainage waste system and equalize the pressure as water drains out, notes IPS Corporation.

    Full Answer >
    Filed Under:
  • Q:

    What is a water shut off valve?

    A:

    A water shutoff valve refers to a small local valve that is used to control the water flow to a plumbing fixture. This type of valve is commonly found under the sink or under the toilet tank.

    Full Answer >
    Filed Under:

Explore