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Old 03-25-2005, 05:54 AM   #1
Seeing StaRS
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Default Change your PCV valve

I just wanted to post a suggestion to the N/A folks to think about changing your PCV valve if you haven't done so recently. I did mine today and (call me crazy) but the car did seem to run better. A fresh PCV valve is supposed to help improve idle, reduce oil consumption and improve gas mileage a tick or so.

I dunno I just thought it would be worthy of suggesting to everyone since it made my car run a little better.

2000 RS brp coupe 65k miles

joe

For those who need assistance:
http://www.northursalia.com/m...n/pcv/pcv.html
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Old 03-25-2005, 09:43 AM   #2
Impreza_RX
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What exactly is a PCV Valve?

Last edited by advanrs; 03-25-2005 at 09:44 AM. Reason: Typed Valva instead of Valve
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Old 03-25-2005, 10:31 AM   #3
RS_to_WRX_swap
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How many miles did you have on yours?
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Old 03-25-2005, 11:11 AM   #4
Lavery
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2nd this...What does the valve regulate?
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Old 03-25-2005, 02:41 PM   #5
Tim Sanderson
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P ositive.C rankcase.V entilation.

"This system reduces HC emissions by drawing fuel and oil vapors from the crankcase and sending them into the intake manifold, where they are delivered to and burned in the cylinders. This system prevents the pressurized vapors from escaping the engine and entering the atmosphere."

source:Automotive technology: a systems approach. 3rd edition.
author: Jack Erjavic.
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Old 03-25-2005, 04:24 PM   #6
OneOBS
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I don't believe the newer models (like my 04) have a PCV. I think its just a metered port.
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Old 03-25-2005, 05:14 PM   #7
Lavery
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Good info Tim, thanks
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Old 03-25-2005, 06:52 PM   #8
Seeing StaRS
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Quote:
Originally Posted by RS_to_WRX_swap
How many miles did you have on yours?

Unless it had been done under the previous owner of my car, I'm assuming it had never been done. (65k miles)

joe
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Old 03-25-2005, 11:13 PM   #9
Crash477
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I changed mine on my 2002 RS with 32000 miles. Its part of the 30k service. Its a good thing to do. I noticed the car felt better, better fuel mileage too.
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Old 03-25-2005, 11:25 PM   #10
cmsrally
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is it easy to swap out?
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Old 03-25-2005, 11:32 PM   #11
Crash477
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yeah it was for me because we had the engine out, and the intake manifold off. but it shouldnt be hard.
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Old 03-25-2005, 11:41 PM   #12
bongchild
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Quote:
Originally Posted by cmsrally
is it easy to swap out?

Yes. Very. I did it in 5 mins with an open-ended wrench.
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Old 03-26-2005, 04:54 AM   #13
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I did the one on my Legacy last week and it seemed to smooth out the idle a little.
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Old 03-26-2005, 08:26 PM   #14
t3hWIT
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another plus. the valve's like 2$ and takes that many minutes to change.
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Old 03-26-2005, 08:37 PM   #15
keirnna
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Dang, I should have ordered one from Subaruparts.com when I ordered all of my other tune up parts. I didn't know what it was for so I held off. Hopefully the dealer has one.
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Old 03-27-2005, 02:54 AM   #16
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This is by far the eaiset thing to do to your car. It only takes like 3 min. Note that it is actually recomended that you change your PCV valve every 15k miles along with your fuel filter.
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Old 03-27-2005, 09:58 AM   #17
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i believe u are wrong x4. fuel filter & pcv valve are 30k mile maintenance items...
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Old 03-27-2005, 11:23 AM   #18
feelthebreak
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i`m going to change mine at 15,000.
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Old 03-27-2005, 04:19 PM   #19
Seeing StaRS
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well regardless of when you change it, the thing that matters is that it actually gets done right guys?

joe
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Old 03-28-2005, 04:15 AM   #20
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Yep. I'm wrong. Recomended interval between fuel filter replacement is 30k miles.
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Old 04-04-2005, 09:26 PM   #21
Evan_Ng
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Are the 04RS Pcv valves different?
cuz of the intake manifold?
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Old 04-04-2005, 09:59 PM   #22
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I believe that Brian at www.subaruwrxparts.com recommends every 15k or so for changing this thing. Which really is ridiculously easy, it's like a 17mm socket and two minutes of your time.

I've only changed mine once, several months ago, but before that honestly I'm not sure how often mine was swapped. I had dealerships do my services back then.
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Old 04-05-2005, 03:19 PM   #23
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btw just to let you guys who drive the 04RS with the plastic intake manifold. The pcv valve is NOT located on the intake manifold. It's actually located on the block. If the car is facing towards you, the valve is located on the left side of the block. Happy finding.
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Old 04-05-2005, 03:25 PM   #24
skunkfifty
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take note anyone whos motor is using oil. a faulty PCV valve will cause some oil consumption.
replace your old one and your consumption may go down, if thats the case anyway. mine did. ymmv.
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Old 04-05-2005, 08:04 PM   #25
RS_to_WRX_swap
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I'm having trouble finding the right PCV valve for my 2003 RS. Autozone gave me the one for previous years. Anyone else have the same problem?
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