• Share:
Shake Your PCV Valve

Perform the world's easiest diagnostic test: Shake your PCV valve to make sure it's working. It takes only 5 minutes to replace a bad one.

By the DIY experts of The Family Handyman Magazine

Shake your PCV valve

This sounds complex, but it's not. Pull out your PCV valve every other oil change. In most cases, you'll find the valve on the top of the engine, connected to a vacuum hose. Some late-model cars don't have PCV valves, so don't beat yourself up trying to find it. Slide the vacuum hose off the valve and unscrew the valve. Then perform the world's easiest diagnostic test: Shake it. If it makes a metallic clicking sound, it's good. If it doesn't make noise or sounds mushy, replace it. But don't replace it on appearance alone—all used PCV valves look dirty.

Need help locating your PCV valve? Buy a short subscription to an online factory service manual (oem1stop.com); rates start at about $10 a day. Non-factory manuals are cheaper, but they're skimpy on instructions and diagrams for these kinds of repairs.

Back to Top

Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

    • Adjustable wrench

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

    • New PCV valve

Comments from DIY Community Members

No comments on the article have been posted yet. Be the first to add your comment!

You will be required to log in or create an account to post a comment.

closeX

Add Your Comment

Shake Your PCV Valve

Please add your comment
closeX

Log in to My Account

Log in to enjoy membership benefits from The Family Handyman.

  • Forgot your password?
Don’t have an account yet?

Sign up today for FREE and become part of The Family Handyman community of DIYers.

Member benefits:

  • Get a FREE Traditional Bookcase Project Plan
  • Sign up for FREE DIY newsletters
  • Save projects to your project binder
  • Ask and answer questions in our DIY Forums
  • Share comments on DIY Projects and more!
Join Us Today
closeX

Report Abuse

Subject
Reasons for reporting post

Free OnSite Newsletter

Get timely DIY projects for your home and yard, plus a dream project for your wish list!

Follow Us