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.

Supplies Needed for This Job:

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.

[Meekmillan]

I did not expect an auto parts store video to actually be helpful lol
Godbless you glasses man

[Platano_macho]

This is the most useful video scotty Kilmer didn't even explain it as well as this video

[LewisAraujo]

This is the kind of video I like....well explained, straight information and quality video. Tks.

[davidblois]

$8 part and probably 5 minutes most to replace it? And my local dealership wanted to charge $300? Yeah no thank you.

[Horsewoman-ptku]

Thank you. I have oil burning and every time I take my car in for oil change I tell them and they have never mentioned pcv valve. I figured it out when I changed my air flow sensor.

[esgarza]

I have a bad oil valve gasket I'm about to replace it and the spark plugs what could be causing white smoke coming out of the oil fill thank you

[fx_johan_G]

More contets like this teaching our
Community

[drifta]

I bought a new fuelmeiser pcv valve and was wondering if you blow in it should it be completely sealed, the valve I bought very slowly leaks air as I blow into it is this ok or should I send it back?

[fullspectrumalchemist]

I inherited the truck from my father and I the oil change place said I’ve been burning massive amounts of oil and have my PCV check due to its never been replaced. No smoke and have great power still just massive oil consumption

[marcsan]

NICE MAN !! PERFECT VIDEO WITHOUT ADS :-)

[Abu_al-rrub]

Can this valve cause the vehicle to hesitate and idle roughly?

[BlitzenSpeaks]

I wish mine was that easy to change. Ford put it on the back of the block; close to the firewall. With my bear paw hands, it's tough to get back there! And it's in a blind spot, so you have to work by touch.🙄

[titanharper]

I have blue smoke coming out of my cars exhaust when taking off any idea?

[MrMsMexican]

Dude sounds like Rick from pawn stars wtf 💀😂😂

[zhthgec]

If my plugs are oily, once i stop burning oil will they clean up soon after or do they HAVE to be swapped? I just got new ones and dont wanna spend extra.

[raymondo]

If your pcv is deleted could this cause oil consumption issues?

[j-kane]

Thanks for the video. Is part of the symptoms strong exhaust fumes? Not in the cab, but outside?

[stevej]

Sx4 2013 pcv is 190k old. Oil is disappearing 2 qts every 5k miles. Is it worth trying to clean it?

[mariuszritt]

Where is the PCV Valve located in a 2014 Toyota Camry? Pic would be helpful... thanks!

[barbellsandwindmills]

Would a bad PCV Valve cause air suction when taking out the oil dipstick?