PCV Valve Question?

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Old Jun 25, 2009 | 09:30 PM
  #41  
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Originally Posted by t0talacuratl
To be honest, I don't know. Far as I can tell, it takes the oil out of the air that gets sucked into the intake manifold.
your right, but had my motor running to check out my install when i heard a suction noise so i put my finger over the release valve and sure enought it is sucking air into the filter just wondering if thats normal
thank
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Old Jul 20, 2009 | 06:57 PM
  #42  
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can you rehost the pictures?
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Old Jul 20, 2009 | 07:58 PM
  #43  
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Originally Posted by csmeance
can you rehost the pictures?
As requested.

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Old Jul 20, 2009 | 10:23 PM
  #44  
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How long did it take to accumulate this amount ? I am trying to get a feel of how often the little canister would need to be emptied.

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Old Jul 21, 2009 | 05:35 AM
  #45  
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Originally Posted by Inaccurate
How long did it take to accumulate this amount ? I am trying to get a feel of how often the little canister would need to be emptied.


That was 500 miles of driving after the initial install. It has be over 1000 now, and really no change from that. I will take updated pics soon.
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Old Jul 21, 2009 | 04:51 PM
  #46  
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Is it just me or dose your belt look like it needs to be changed??
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Old Jul 21, 2009 | 05:06 PM
  #47  
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Originally Posted by BAM1369
Is it just me or dose your belt look like it needs to be changed??
Did it last month; thanks for playing! lol!!! I did the timing belt and water pump as well.
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Old Jul 29, 2009 | 06:30 PM
  #48  
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Originally Posted by Joey tl
your right, but had my motor running to check out my install when i heard a suction noise so i put my finger over the release valve and sure enought it is sucking air into the filter just wondering if thats normal
thank
Ok I got the suction noise as well. So I got a rubber vacuum cap (part # 715-1803) from Napa to place on the end. Fits perfect!
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Old Jul 29, 2009 | 08:51 PM
  #49  
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what vacuum port was open? did you lose a plug somewhere?
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Old Jul 29, 2009 | 09:18 PM
  #50  
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From: Chesapeake, Va
Originally Posted by NedShneebly
what vacuum port was open? did you lose a plug somewhere?
No; on the bottom of the container it has some kind of release valve that is stuck open. I guess it had some sort of function, but not for this purpose.

I notice the separator in the TSX thread did not have this valve. They had a rubber plug/cap on the end. I could not find that type and had to settle, but I thought the valve was closable. No biggy; problem solved.
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Old Aug 8, 2009 | 06:06 PM
  #51  
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I just did this install today. Here are my tips in addition to all the great information shared earlier:

- I wound up using two 90 degree elbows instead of the one. The hoses just seemed to route better this way. Also to work around the clearance issue with the PCV input hose, I wound up braiding the two new hoses around the other major hose in the area- just one twist is all you need. I just cut the new hoses a little longer support the braiding idea. There is no clearance issue at all now.

- I have a closable valve on the bottom, but it looked too easy to open since it's a 360 degree twist valve. I bought a 14 pack of ClosetMaid shelf caps to plug that nipple (found in Home Depot where the wire shelfs are sold as a 14 pack for $1.25). The package comes with two sizes and the small cap fits the bottom of the Husky nipple very well.

- I used some Heavy Duty velco to attach the filter assembly to the car. I mostly did this to prevent the filter top from scratching the paint. The Velcro keeps the unit in place very well.

I just did a test start of the car and it doesn't seem to stumble as much as I'm used to when it idles that first minute cold- perhaps coincidental but I want to think this mod helped. I guess I'll do my Wifes car next weekend since I used the extra elbow on my car and don't want to brave another Home Depo trip today.

Last edited by LaCostaRacer; Aug 8, 2009 at 06:08 PM.
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Old Aug 8, 2009 | 08:36 PM
  #52  
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From: Chesapeake, Va
Originally Posted by LaCostaRacer
I just did this install today. Here are my tips in addition to all the great information shared earlier:

- I wound up using two 90 degree elbows instead of the one. The hoses just seemed to route better this way. Also to work around the clearance issue with the PCV input hose, I wound up braiding the two new hoses around the other major hose in the area- just one twist is all you need. I just cut the new hoses a little longer support the braiding idea. There is no clearance issue at all now.

- I have a closable valve on the bottom, but it looked too easy to open since it's a 360 degree twist valve. I bought a 14 pack of ClosetMaid shelf caps to plug that nipple (found in Home Depot where the wire shelfs are sold as a 14 pack for $1.25). The package comes with two sizes and the small cap fits the bottom of the Husky nipple very well.

- I used some Heavy Duty velco to attach the filter assembly to the car. I mostly did this to prevent the filter top from scratching the paint. The Velcro keeps the unit in place very well.

I just did a test start of the car and it doesn't seem to stumble as much as I'm used to when it idles that first minute cold- perhaps coincidental but I want to think this mod helped. I guess I'll do my Wifes car next weekend since I used the extra elbow on my car and don't want to brave another Home Depo trip today.
Good deal! I thought my car felt and sounded smoother after the mod; in my head or not. Did you change your PCV Valve as well? Also please post some pictures.
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Old Aug 9, 2009 | 11:03 PM
  #53  
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Here are some pictures of my install. My car has just 24K miles so I skipped replacing the PCV valve- hopefully this modification will preserve the PCV's life so I won't have to change it for a long time.

This should show the braided lines and the two elbow connectors:
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These are the closet caps:
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Old Aug 10, 2009 | 05:41 AM
  #54  
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^^Nice!!!!!
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Old Jan 28, 2010 | 04:29 PM
  #55  
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ok i did this, how come on another thread, the catch can is at the rear, close to the throttle body?

https://acurazine.com/forums/showthr...=diy+oil+catch
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Old Jan 28, 2010 | 10:25 PM
  #56  
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Using an oil with a super low NOACK number like Redline will nearly eliminate oily residue in the intake tract but the separator is nice.
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Old Jan 30, 2010 | 12:36 AM
  #57  
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Originally Posted by I hate cars
Using an oil with a super low NOACK number like Redline will nearly eliminate oily residue in the intake tract but the separator is nice.
IHC, do you think this is good mod to do for us guys going turbo?

I dont think my pcv valve has ever been replaced after 110k miles
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Old Jan 30, 2010 | 06:50 AM
  #58  
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Originally Posted by libert69
IHC, do you think this is good mod to do for us guys going turbo?

I dont think my pcv valve has ever been replaced after 110k miles
I replaced mine and added the oil separator mod after 100k. I get a good amount of oil in the collector after a few hundred miles on a N/A. It couldn't hurt.
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Old Jan 30, 2010 | 12:16 PM
  #59  
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Originally Posted by libert69
IHC, do you think this is good mod to do for us guys going turbo?

I dont think my pcv valve has ever been replaced after 110k miles
The separator is an excellent mod for a turbo car for several reasons.

You'll be running higher oil temps so more evaporation into the intake tract.

More blowby past the rings.

You don't want the oil and blowby gasses getting into the inlet of the turbo and coating the intercooler from the inside. Over time it knocks down the cooling efficiency of the intercooler.

With the intake manifold now under pressure, the PCV valve is non functional under boost. In a wost case scenario the PCV can fail causing boost to pressurize the crankcase. I'm not sure if the kit addresses this potential problem or not. But either way you have no PCV under boost and there's more blowby at the same time. The gasses have to exit the engine somehow and that would be through the fresh air intake pre-turbo. This is why it's a very good idea to put a breather filter on this hose and leave it disconnected from the intake.

Or to summarize, on a turbo application, use the separator on the PCV and a breather filter on the fresh air intake for the crankcase. A good oil with a low NOACK will minimize oil vapors but not blowby gasses.
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Old Jan 30, 2010 | 04:15 PM
  #60  
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Originally Posted by I hate cars
The separator is an excellent mod for a turbo car for several reasons.

You'll be running higher oil temps so more evaporation into the intake tract.

More blowby past the rings.

You don't want the oil and blowby gasses getting into the inlet of the turbo and coating the intercooler from the inside. Over time it knocks down the cooling efficiency of the intercooler.

With the intake manifold now under pressure, the PCV valve is non functional under boost. In a wost case scenario the PCV can fail causing boost to pressurize the crankcase. I'm not sure if the kit addresses this potential problem or not. But either way you have no PCV under boost and there's more blowby at the same time. The gasses have to exit the engine somehow and that would be through the fresh air intake pre-turbo. This is why it's a very good idea to put a breather filter on this hose and leave it disconnected from the intake.

Or to summarize, on a turbo application, use the separator on the PCV and a breather filter on the fresh air intake for the crankcase. A good oil with a low NOACK will minimize oil vapors but not blowby gasses.
im gonna bang this mod out on monday. ill probably use the same parts the the OP listed earlier from homedepot and the left over hose from my transmission cooler. would you use anything different or change anything?
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Old Jan 31, 2010 | 07:30 PM
  #61  
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LaCostaRacer and t0talacuratl

I just purchased all the items needed for this install. It seems like valve on the bottom of the air filter is so flimsy that It will probably leak.

t0talacuratl - does your unit leak at all from the valve on the bottom?

LaCostaRacer - i bought those little caps that you mentioned and they fit very good. do you have any leaks?

I actually bought 2 air filters so I could take apart the first one and try to seal valve shut. The valve is a tiny screw that works in 360 degree open/close method. I took off the little rubber o-ring that sits between the stopper on top (that allows the fluid to drain) and the screw, and sealed the area up so It wont drain anymore. I think this method might be better but thats assuming that the filter will leak since it says to avoid oils in the bowl. When I need to drain the bowl I can just unscrew the whole bowl and dump it.

Do you guys get any leaks?
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Old Jan 31, 2010 | 08:12 PM
  #62  
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Originally Posted by libert69
I just purchased all the items needed for this install. It seems like valve on the bottom of the air filter is so flimsy that It will probably leak.

t0talacuratl - does your unit leak at all from the valve on the bottom?

LaCostaRacer - i bought those little caps that you mentioned and they fit very good. do you have any leaks?

I actually bought 2 air filters so I could take apart the first one and try to seal valve shut. The valve is a tiny screw that works in 360 degree open/close method. I took off the little rubber o-ring that sits between the stopper on top (that allows the fluid to drain) and the screw, and sealed the area up so It wont drain anymore. I think this method might be better but thats assuming that the filter will leak since it says to avoid oils in the bowl. When I need to drain the bowl I can just unscrew the whole bowl and dump it.

Do you guys get any leaks?
Yeah it started leaking soon after the install. I had to get a little cap as well. I did not take out the o-ring, and it still collects oil.
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Old Jan 31, 2010 | 08:36 PM
  #63  
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Originally Posted by t0talacuratl
Yeah it started leaking soon after the install. I had to get a little cap as well. I did not take out the o-ring, and it still collects oil.
I figured it would but I hoped it didnt. So that little cap stops the leaks?
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Old Feb 1, 2010 | 10:57 PM
  #64  
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my version







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Old Feb 2, 2010 | 04:37 AM
  #65  
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^Nice set up! Very clean!

Originally Posted by libert69
I figured it would but I hoped it didnt. So that little cap stops the leaks?
It's ok; mine is starting to soak through the cap alittle. I think I broke the screw when I was making sure it was close.....
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Old Feb 2, 2010 | 10:47 AM
  #66  
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^ Can't the entire nipple get epoxied before use? If the oil in the filter isn't too hot, then this might be the best way to seal it, or even glue the cap onto nipple..

Good write-up btw, I'll be doing this mod on a nice day.
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Old Feb 2, 2010 | 12:43 PM
  #67  
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Originally Posted by t0talacuratl
^Nice set up! Very clean!



It's ok; mine is starting to soak through the cap alittle. I think I broke the screw when I was making sure it was close.....
then do what I did and seal the valve shut with some epoxy. the only way to drain it now is to remove the hole bowl but it will not leak this way.

Originally Posted by HQTL6SPD
^ Can't the entire nipple get epoxied before use? If the oil in the filter isn't too hot, then this might be the best way to seal it, or even glue the cap onto nipple..

Good write-up btw, I'll be doing this mod on a nice day.
remove the little o-ring and seal everything shut. it will not leak this way
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Old Feb 6, 2010 | 12:19 AM
  #68  
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this is after 200 miles
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Old Mar 11, 2010 | 11:08 PM
  #69  
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^ Great work! It's been a while since I have seen this thread. Anyway, both my cars have the catch cans and they are working well with no leaks. I had to glue the nipples a while back because one came off. I'll be emptying our Pilot's this weekend when I change the oil. The capacity is ample so there are no worries on that end.
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Old May 3, 2010 | 01:10 PM
  #70  
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Did this mod over a month ago. About 400 miles later, and just noticed a few drops this week.

Swapped the PCV valve, cleaned the intake and manifold at the same time, and it was pretty clean since all I use are RP and redline oil.

I guess the oil really makes a difference!
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Old Apr 2, 2011 | 07:05 PM
  #71  
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FYI: for California drivers- make sure you take this off before taking your car in for a smog test because it will fail because the emissions system has been 'altered'. I had to take this off my Wife's Pilot so she could pass the smog test. I'll do this on the TL next year when it's do for a smog test. So if you do the mod- make sure you save the original tubing because you will need it.
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Old Apr 2, 2011 | 08:14 PM
  #72  
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I am going to get the parts for this mod tonight. Going FI this is a must from my civic and 240sx days. IHC was right, with FI you have alot high temps and alot more blow by. I am glad I am bored and stumbled on this!
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Old Sep 15, 2013 | 10:23 PM
  #73  
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Disregard answered my own question, one side is for 'fresh air' in and the opposite is for the blow-by the breathe into the intake tract.

Last edited by mzilvar; Sep 15, 2013 at 10:32 PM.
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Old Sep 16, 2013 | 05:10 AM
  #74  
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Ok so maybe I didn't answer my own question lol..

From the looks of it to me, both cylinder covers are under vacuum unless I'm missing something.

One side has the PCV valve on it, venting into the intake manifold behind the throttle body.

The other cover vents directly into the air intake, before the throttle body.

So my question, why only one filter separator?

Should I use two?

Few different options, curious, pros/cons? Diagrams attached.
Attached Thumbnails PCV Valve Question?-dual-filter-seps.jpg   PCV Valve Question?-filter-sep.jpg   PCV Valve Question?-oil-catchrb.jpg  
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Old Sep 16, 2013 | 05:31 AM
  #75  
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lol .. sorry for triple post.

Found another diagram, disregard did answer my question.

So the catch can would go on the PCV side.
Attached Thumbnails PCV Valve Question?-pcv.jpg  

Last edited by mzilvar; Sep 16, 2013 at 05:33 AM.
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Old Sep 16, 2013 | 09:38 AM
  #76  
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The catch can traditionally goes on the PCV side but some put it on the fresh air side too. The fresh air side is not needed except during full throttle where flow can reverse due to the PCV having no vacuum and the additional crank case pressure. I would only do the PCV side unless you're boosted where the fresh air side will reverse flow often.
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