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Old 03-26-2021, 12:55 PM   #1
a5m
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Join Date: Nov 2020
Location: Chicago
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2010 Impreza WRX
Satin White Pearl

Default Only Replace PCV or Hoses Too?

Need some quick advice as I'm planning to change the PCV Valve on my 2010 WRX which I'm sure is still the original one. Car has 114k on it.

As much as I want to change just the valve I get the feeling it would be easier/better to change all the hoses in that area as well. Can anyone share their experience?

Thanks in advance.

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Old 03-30-2021, 12:21 PM   #2
a5m
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Satin White Pearl

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Replaced the PCV Valve yesterday. Not as hard as it looked. Once the TMIC is removed itís all there in plain view. Definitely need long narrow flat head screw driver to release and long needle nose pliers to close those stupid clamps.

The ĎFí shaped hose with the two outlets that sits on the block broke into 3 pieces as soon as we maneuvered it around. Clearly sees the most heat and was quite brittle. Other hoses were surprisingly perfectly fine.

Pretty sure it was the original PCV Valve in there. It made the slightest hint of noise but was basically clogged up and needed to be changed.

Here are the Part #ís in case anyone is interested:

PCV Valve 11810AA120
Connector PCV ĎFí Hose 11821AA640
Large Clamp for above 14877AA010


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Old 03-30-2021, 12:39 PM   #3
Stretch18
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pandiculation

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I had essentially the same experience when I pulled mine a few years back. The F hose was hard and brittle and cracked easily. Those locking ear clamps are also a PITA if you don't have the tool.

I was in there last week installing a Verus AOS, which necessitated moving to an STi PCV that mounts directly to the unit, rather than close to the block. The hose was in good condition this time around. I'd post a picture, but NASIOC photo hosting won't upload photos taken from my new phone, even if I upload from my computer...
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Old 03-30-2021, 01:06 PM   #4
a5m
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Satin White Pearl

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Quote:
Originally Posted by Stretch18 View Post
I had essentially the same experience when I pulled mine a few years back. The F hose was hard and brittle and cracked easily. Those locking ear clamps are also a PITA if you don't have the tool.

I was in there last week installing a Verus AOS, which necessitated moving to an STi PCV that mounts directly to the unit, rather than close to the block. The hose was in good condition this time around. I'd post a picture, but NASIOC photo hosting won't upload photos taken from my new phone, even if I upload from my computer...
Yea I mentioned to my buddy that Subaru makes a specific tool for those clamps. He was curious to know what it is. Iím pretty sure he wants one now haha.

Thatís good to know. We were talking about replacing the PCV every year as preventative maintenance. Itís like $30 for that hose so rather not replace it if I donít have to. Interestingly itís made in China, the PCV Valve Vietnam, and the Clamp France lol.

I resize images before uploading them. Perhaps thatís the issue since new phones have high MP cameras which must produce larger files.
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Old 03-30-2021, 01:10 PM   #5
Stretch18
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Quote:
Originally Posted by a5m View Post
Yea I mentioned to my buddy that Subaru makes a specific tool for those clamps. He was curious to know what it is. Iím pretty sure he wants one now haha.

Thatís good to know. We were talking about replacing the PCV every year as preventative maintenance. Itís like $30 for that hose so rather not replace it if I donít have to. Interestingly itís made in China, the PCV Valve Vietnam, and the Clamp France lol.

I resize images before uploading them. Perhaps thatís the issue since new phones have high MP cameras which must produce larger files.
The clamps are 'oetiker clamps.' You can get the install tool on amazon or elsewhere for about $20.
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Old 03-30-2021, 01:14 PM   #6
a5m
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Satin White Pearl

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Quote:
Originally Posted by Stretch18 View Post
The clamps are 'oetiker clamps.' You can get the install tool on amazon or elsewhere for about $20.
Thank you! Heís gonna love this. Hopefully this will help anyone else too looking to take on this task
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Old 03-30-2021, 01:15 PM   #7
Stretch18
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Quote:
Originally Posted by a5m View Post
I resize images before uploading them. Perhaps thatís the issue since new phones have high MP cameras which must produce larger files.
Ok, that's actually annoying, since the image was only 2mb to begin with...

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Old 03-30-2021, 01:17 PM   #8
a5m
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Quote:
Originally Posted by Stretch18 View Post
Ok, that's actually annoying, since the image was only 2mb to begin with...

Then itís a dimension issue. Too many pixels. Thanks for the image too btw. Definitely looks to be in good shape.
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Old 04-04-2021, 01:15 PM   #9
CaptainSlowbaru
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The last time I replaced one of those hoses, I used a pair of hose pliers on that clamp.


FWIW, at our dealer we replace PCV valves every 30K miles.
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Old 04-04-2021, 01:57 PM   #10
a5m
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Satin White Pearl

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Quote:
Originally Posted by CaptainSlowbaru View Post
The last time I replaced one of those hoses, I used a pair of hose pliers on that clamp.


FWIW, at our dealer we replace PCV valves every 30K miles.
Thanks so much for the tip on pliers and the replacement interval. Me and friend were saying yearly but 30k makes more sense and thatís what Iíll do.
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