PT Cruiser Forum  
Advertisements
       

Go Back   PT Cruiser Forum > General Forums > Tech & Performance Forum

PT Cruiser Forum

Advertisements
Explain the 01's PCV hose to me...please.

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 27 Jan 2013, 03:43 pm
JenneK's Avatar
Cool Cruiser
 
Join Date: Jun 2012
Location: Island of Maui
Posts: 275
Default Explain the 01's PCV hose to me...please.

My 01 NA has two hoses coming from the valve cover. The one on the front right is the PCV and seems to have the valve that screws into the cover.

There is one on the back side with no such valve that connects straight to the flexible intake tube. What's up with that one? Why no check valve or anything? It's oily in there. It gets my throttle body oily and screws up my idle. It also makes a puff of smoke come from my exhaust at start up under certain condition. Me no likey. I've read where that's "common" on the 01's.

Can I plug it and the intake tube? Is there a better "fix"? Is that tube there on subsequent models?
__________________
Ken posting about his Jenny's car.

01 w/JBA headers, Borla catback, Airaid intake, lowered, purple with shiny wheels.

Last edited by JenneK; 27 Jan 2013 at 03:45 pm.
Reply With Quote
  #2 (permalink)  
Old 27 Jan 2013, 05:24 pm
Obsessed Cruiser
 
Join Date: Sep 2001
Posts: 27,744
Default Re: Explain the 01's PCV hose to me...please.

I'm not sure why the second tube/vacuum line that's connected to the flexible intake is oily? Mine is dry as a bone. Not a drop of oil inside the line or at either end. I'm not sure of it's purpose except it might be taking some of the gases/fumes from under the valve cover and it's being sucked into the intake where it's burned. Maybe something to do with the emissions.

If yours is oily and making your throttle body oily, you have something wrong. Have you changed your PCV valve lately?
__________________
Rules of the forum have been updated as of *07/07/2019* Please read them over.

- All decisions by the Moderator are semi-permanent, can and may be changed at his discretion but definitely will be the final word. Any action performed by the Administrator or Moderators are not to be discussed on the forum.
Reply With Quote
  #3 (permalink)  
Old 27 Jan 2013, 05:39 pm
NitroPT's Avatar
Obsessed Cruiser
 
Join Date: Jun 2012
Location: USA kalyfornia
Posts: 15,755
Default Re: Explain the 01's PCV hose to me...please.

I can't find where I already gave a technical response pertaining to PCV system. maybe CREWZIN can find it?

In short, No you can not plug the valve side of the PCV system or air filter hose because of crankcase pressure. Yes you can bypass the complete system running without a PCV valve. but this must be done correctly and it will not meet emission regulations. If oil is on present in either hoses but seen mostly on the air filter side you it is a sign of engine wear either rings or valve guides.
__________________
To view larger pictures simply "click " on the picture!

Dalai Lama
"Share you knowledge. It's the best way to achieve immortality."
ASE MASTER TECHNICIAN
Reply With Quote
  #4 (permalink)  
Old 27 Jan 2013, 07:43 pm
Busted_PT's Avatar
Obsessed Cruiser
 
Join Date: Jan 2012
Location: Beckley, W.V.
Posts: 13,886
Default Re: Explain the 01's PCV hose to me...please.

Quote:
Originally Posted by JenneK View Post
My 01 NA has two hoses coming from the valve cover. The one on the front right is the PCV and seems to have the valve that screws into the cover.

There is one on the back side with no such valve that connects straight to the flexible intake tube. What's up with that one? Why no check valve or anything? It's oily in there. It gets my throttle body oily and screws up my idle. It also makes a puff of smoke come from my exhaust at start up under certain condition. Me no likey. I've read where that's "common" on the 01's.

Can I plug it and the intake tube? Is there a better "fix"? Is that tube there on subsequent models?
Somewhere on here they speak of a catch can mod that caught the oil. Hose runs into it and out to the intake hose or air box.
__________________

03 Dream stock___________________________ 04 Touring turbo lite stock_________ 02 Touring stock_____________________ The "Three Amigos"
__________________________________________________ __________________________________________________ ___________Performance, Body and Service, OEM

This Is my project page.
http://www.ptcruiserlinks.com/forum/...oject-1-a.html

This is a great read from one of our own! Badglas
badglas.blogspot.com
Reply With Quote
  #5 (permalink)  
Old 27 Jan 2013, 08:52 pm
Senior Cruiser
 
Join Date: May 2012
Posts: 1,354
Default Re: Explain the 01's PCV hose to me...please.

Theres really only 3 ways for oil to get into the upper manifold.

1 through the air cleaner, up into the throttle body *a dirty throttle body can spit oil into the upper intake easily*

2. The PVC valve being stuck in the open position *remove it and shake it, if you cant hear the bearing bounce around, its time to replace*

And through the lower intake *sometimes the seals around this have oil, but if theres a LOT of oil near these seals, you have bigger issues*

I would start by removing the upper manifold, and looking inside with a flashlight

There is a TON of air being moved through this so any oil residue inside should leave a visible grease mark either from the throttle body, from the other end of the PVC hose or from the lower manifold upwards. Take a look inside and see what you can see, if that doesnt pan out, check your PVC valve, check the throttle body and check around the lower seals on the upper manifold :-D should get a pretty good idea of whats going on :-)

My guess is its the PVC if that is clogged the motor will blow oil out of the weakest point in the motor so, a $6 part may fix this :-D

Last edited by pluminator; 27 Jan 2013 at 08:54 pm.
Reply With Quote
  #6 (permalink)  
Old 28 Jan 2013, 02:03 pm
UptownSport's Avatar
Veteran Cruiser
 
Join Date: Jan 2011
Location: 55403
Posts: 3,912
Default Re: Explain the 01's PCV hose to me...please.

There's an interval for replacing PCV-
I worry that spring corrodes or valve accumulates sediment- making calibration off-

in short, replace PCV!!!!!

Valvecovers separate (as best they can) liquid from crankcase air thru labyrinths under an aluminum plate (on PT). Labyrinths have needed to be resealed (early 2.2).

Valve cover MAY be improved for a better labyrinth. PT did have a valve cover change early on.
Why?
Cosmetics?
Added boss?
Labyrinth improvement?

I don't know

Most liquid that PCV passes is water, a separator will collect lots of it.

Oil in intake isn't unusual in an old/high mileage vehicle, or even newer ones- If ring seal is lacking in one spot, you'll get blow-by.
It doesn't look good, but doesn't hurt anything.

in short here, don't try to fix what isn't broken!!!

You can see spectacular blow-by when dudes put on the nifty turbo kit an a Neon (or any) engine and don't add enough fuel- engine cracks piston and adds pressure beyond PCV design
Reply With Quote
  #7 (permalink)  
Old 02 Feb 2013, 12:46 am
JenneK's Avatar
Cool Cruiser
 
Join Date: Jun 2012
Location: Island of Maui
Posts: 275
Default Re: Explain the 01's PCV hose to me...please.

Thanks for all the responses.

As usual I went off all half cocked. My brain just wasn't working... The PCV was in need of a cleaning...or at least that's what fixed the issue. Here I was ready to rework the entire emission system just to fix a simple issue.

Thanks for pointing me on the straight path.
__________________
Ken posting about his Jenny's car.

01 w/JBA headers, Borla catback, Airaid intake, lowered, purple with shiny wheels.
Reply With Quote
  #8 (permalink)  
Old 02 Feb 2013, 11:13 am
2step's Avatar
Senior Cruiser
 
Join Date: Oct 2004
Location: New Braunfels, Texas.
Posts: 1,672
Default Re: Explain the 01's PCV hose to me...please.

Here's a cut-away drawing that shows how a PCV valve works. (Notice the size of the "arrows" and the flow direction)



Different driving styles cause more or less crankcase vapors to escape through the second hose to the intake pipe/air box.

Last edited by 2step; 02 Feb 2013 at 11:18 am.
Reply With Quote
  #9 (permalink)  
Old 02 Feb 2013, 01:58 pm
UptownSport's Avatar
Veteran Cruiser
 
Join Date: Jan 2011
Location: 55403
Posts: 3,912
Default Re: Explain the 01's PCV hose to me...please.

Where do these arrows come from, and do they hurt my engine?

Quote:
Originally Posted by JenneK View Post
Thanks for all the responses.

As usual I went off all half cocked. My brain just wasn't working... The PCV was in need of a cleaning...or at least that's what fixed the issue. Here I was ready to rework the entire emission system just to fix a simple issue.
been done before
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Someone explain the warranty situation! alexatanes General PT Cruiser Discussions 6 14 Nov 2008 10:39 pm
Trying to explain "the sound"... blucrsr Wheels, Tires, Suspension 12 10 Aug 2005 07:31 am
Buy now explain later policy? stirfry General PT Cruiser Discussions 24 28 Apr 2004 04:51 pm
Explain tire sizing cruisergeo Turbo Wheels/Suspension/Handling 13 28 May 2003 07:40 pm


All times are GMT -5. The time now is 02:02 am.




Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors