How To Test and Replace the PCV Valve on Your Car. Story by Family Handyman • 9mo. Y ou take your car in for an oil change. The work is almost done when the technician comes out to talk to you.

How Do You Test a PCV Valve? Although many PCV valves cost less than $15 and thus might be worth replacing as a preventative measure, it’s usually fairly simple to check yours to see if it’s ...

If you’re replacing a faulty PCV valve in the 4.6-liter V8, you’ll find it in one of the valve covers, next to the oil filler cap. You can replace this part yourself even if you know little ...

The bottom line is this: Your service sales staff should understand that a neglected PCV system may cause oil leaks. It also can adversely affect engine performance and gas mileage, but that's another ...

Here's a step-by-step guide on how to replace the PCV valve. The engine used in this guide is a 4.9-liter inline-6 in a 1991 Ford F-150. This engine is also referred to as the Ford 300 .