PCV valve question

[window_lee]

Do we need to replace PCV value???
if we do, when??????

[jambo101]

Every once in a while its a good idea to clean it or replace it,its just a ball bearing/rod in a tube that prevents the ventilation of crankcase fumes going back in the crankcase.Every 50k should do it.

http://media.photobucket.com/image/pcv%20valve/RevXtreme1/pcv_function.gif

[mikenacarato]

funny this thread popped up, i went the the dealer an hour ago to ask the same question. they said at the time you change the spark plugs..which they said was 100k... i call bs on that time frame.

[AlexNet0]

50k miles? how expensive is it and can I do it myself? im a bit over that.

[mikenacarato]

under $10 and if you follow the vacuum line from the manifold to the side of the valve cover (the back line) then you found the pcv valve.

[Tamago]

i purchased a replacement PCV valve and it leaked worse than the OE one. i'd say it does NOT need replacing. it's a steel check valve, not plastic, there's no parts to wear out.

[mikenacarato]

it gets gunked up with blowby oil and will stick the valve up and possibly blow other seals (the vacuum has to come from somewhere else if the tube is blocked up)....it does need replacing...ESPECIALLY for you tamago as you pull more vacuum than normal.

[Tamago]

it gets gunked up with blowby oil and will stick the valve up and possibly blow other seals (the vacuum has to come from somewhere else if the tube is blocked up)....it does need replacing.

it's a metal ball in a metal casing.

if it gets gunked up, spray some brake parts cleaner in it and some compressed air, re-install.

:iono:

if it was plastic i'd agree with you that it should be replaced, but it's not.

[mikenacarato]

its called preventive maintanence for a reason. also, as hot air gets taken into the valve or just the valve heating up in general will wear that spring out and make it brittle and break, which is also another cause of a stuck pcv valve. a good way to check it is to remove the valve, shake it, if the ball clicks, put it back in.

[Tamago]

its called preventive maintanence for a reason. also, as hot air gets taken into the valve or just the valve heating up in general will wear that spring out and make it brittle and break, which is also another cause of a stuck pcv valve. a good way to check it is to remove the valve, shake it, if the ball clicks, put it back in.

160F air will make metal brittle?

i'm not saying it should NEVER be replaced, but it's definitely not a feeble piece of plastic like most cars (domestic especially).

[mikenacarato]

do what you will but a few bucks every now and then wont hurt to protect your investment.

[Tamago]

do what you will but a few bucks every now and then wont hurt to protect your investment.

i'm getting ready to be on engine number 3.

PCV's are the least of my concern :D

but thank you for yours!

[mikenacarato]

eh anytime ;)

when i upped the turbo on my last car i had a sticking pcv valve causing the car not to run 3-4 times. but i was running 25 psi

[Lafiro]

Can there be a DIY on how to find this, how to remove it, what to use to clean it, and how to reinstall please.

I just hit a little over 50k miles, and I will be replacing shocks/drum shoes/spark plugs soon.
Thanks.

[Tamago]

Can there be a DIY on how to find this, how to remove it, what to use to clean it, and how to reinstall please.

I just hit a little over 50k miles, and I will be replacing shocks/drum shoes/spark plugs soon.
Thanks.

you'll need a left handed metric adjustable wrench and a 10mm socket to remove your plastic engine cover.

the drivers side of the engine, on the cam cover closest to the engine, you'll see a hose coming out and going to the intake area. use the metric left handed adjustable wrench to remove the pcv.

if you choose to clean it, use carb cleaner and a short blast of air to ensure there is no gunk inside.

if you choose to replace it, buy a toyota part. the aftermarket ones are junk.

[1stToyota]

http://i264.photobucket.com/albums/ii173/KinskiGTO/Graphic.png

http://i264.photobucket.com/albums/ii173/KinskiGTO/Graphic1.png

You'll see it for sure when you replace cyl #4 spark plug (owner's manual states iridium plugs only)

[GeneW]

There are probably symptoms that go along with a stuck PCV valve. One I do know is excessive oil consumption, up to a quart of oil every 100 miles for V8s.

Don't know if there are reliable checks besides shaking it and listening to for that little ping as the check valve slaps back and forth.

Considering how cheap they are it's probably not a bad idea to replace them every 50K or so. Cheaper than a catalytic perverter or other emissions gear.

Gene

[mikenacarato]

+1, a guy at work blew a crank pressure sensor ($200) out of his maxima because the pcv valve didnt relieve the pressure and overloaded it, he had 150k on it though

[Tamago]

+1, a guy at work blew a crank pressure sensor ($200) out of his maxima because the pcv valve didnt relieve the pressure and overloaded it, he had 150k on it though

sounds about right for a nissan.

[GeneW]

+1, a guy at work blew a crank pressure sensor ($200) out of his maxima because the pcv valve didnt relieve the pressure and overloaded it, he had 150k on it though

Did he drive it with a "Check Engine" light on? Sounds like it.

Gene

[mikenacarato]

idk. but an ignored pcv valve can cause issues is the bottom line lol

[Tamago]

idk. but an ignored pcv valve can cause issues is the bottom line lol

so the importance of changing the PCV is overshadowed by the importance of not being an idiot?

[GeneW]

idk. but an ignored pcv valve can cause issues is the bottom line lol

Had a 86 Pontiac that consumed a quart of oil every 90 miles. Meant that I added a quart of oil PER DAY.

Once I discovered that the PCV valve was hopelessly sludged up - I'd checked it six months before and it seemed fine - I was able to cut consumption from a quart per 90 miles to a quart every three or four hundred miles when I replaced it.

Gene

[Shroomster]

lol...I changed the pcv in my wife's corolla (pre-yaris) and the damn thing hand't been changed since the car was new....165k I grabbed it after removing the vac line....and it fell apart into the chamber in the valve cover...pissed me off...

[N9QGS]

question I just replaced mine, but Im questioning i thought the one I took out was not all the way screwed into the block. I thought there was like two threads you could see between the nut portion of the PCV and the block it screws into. So I put the new on in to about the same point but now i'm questioning if that is what I saw or not..... Anyone recall who have have services this if it should be all the way to the block or if there is a gap. Ron

[Yaris Hilton]

The picture above looks like a tapered pipe thread. If so, I wouldn't expect it to screw all the way in. Just till it's properly tightened.

[SweetRS]

funny this thread popped up, i went the the dealer an hour ago to ask the same question. they said at the time you change the spark plugs..which they said was 100k... i call bs on that time frame.

Iridium plugs only need to be changed every 100k....

[Yaris Hilton]

Yep. RTFM.

[mikenacarato]

Iridium plugs only need to be changed every 100k....

i wasnt referring to the spark plug change interval being bs...i was referring to the pcv valve being replaced at 100k, i believe it needs to be more like 50k

[danielastro28@yahoo.com]

Hi guys,does someone has a pic of pcv valve location on yaris 2006.1.4 diesel.

[CTScott]

Hi guys,does someone has a pic of pcv valve location on yaris 2006.1.4 diesel.

The 1ND-TV Diesel engine does not have a PCV valve.