How To: Diagnose and Replace a PCV Valve

PCV stands for positive crankcase ventilation. The PCV system removes harmful oil vapors from the engine and prevents them from being released into the atmosphere and control the flow of the vapor from the crankcase to the intake manifold. Replacement is considered a maintenance item, so it’s important to replace the valve regularly. Some manufacturers recommend replacement as often as every thirty thousand miles.

View the full job and shop supplies here: https://www.oreillyauto.com/diy-diagnose-and-replace-a-pcv-valve

Supplies Needed for This Job:
1. Safety Glasses: https://urlzs.com/hbwc
2. Gloves: https://bit.ly/2GvfwAm
3. PCV Valve: http://bit.ly/2ZvPuod

0:00 Welcome Back
0:11 PCV Valve Basics
0:47 Symptoms
2:01 Locate the PCV Valve
2:08 Disconnect the Old Sensor
2:24 Install the New Sensor

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If you’re having severe symptoms or aren’t completely sure about diagnosing this yourself, we’d be happy to recommend a professional technician in your area… But here are a few of the symptoms you might be noticing if your PCV valve is failing:

The most obvious warning signs are: smoke coming out of the tailpipe or excessive oil consumption.
If the PCV valve is stuck in the open position, it will draw excess vapors from the crankcase and burn more oil than expected.

Another clue is an engine that’s running roughly due to oil-contaminated spark plugs.
This may also be due to excessive flow from the PCV valve.

Even if your car isn’t running roughly, your oil can provide clues that the PCV valve is failing.
Check for oil spots on your garage floor… a leak could be caused by excess crankcase pressure from a clogged valve.
It’s possible this could cause gasket failure.
And when you change your oil, keep an eye out for sludge draining from the tank… it could be caused by a faulty valve allowing combustion gasses to blend with your oil.

Keep an eye out for any or all of these symptoms.
If you have a faulty PCV valve, it’s important to replace it before any other damage occurs.
For most vehicles, this is a project you can do yourself.

Видео How To: Diagnose and Replace a PCV Valve канала O'Reilly Auto Parts