Notices
Scion tC 1G Drivetrain & Power Engine and transmission discussions...

Anyone knowledgeble about the pcv system?

Thread Tools
 
Search this Thread
 
Old May 2, 2006 | 10:25 PM
  #1  
Typhoon's Avatar
Thread Starter
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Oct 2005
Posts: 507
Default Anyone knowledgeble about the pcv system?

Alrighty well I ve been doing research and found out this: The pcv system has two hoses one is for sucking air in and the other to suck the blow by gases out and goes into the intake manifold.

The setup I used was what I found on the internet a while ago saying how itll clean up your intake manifold from those vapors. What I did is simply take both the hoses out and put filters on both of them. Now what I recently also is that the part that is sucking good air is the hose on the drivers side that goes to the intake tube, and the one where the bad gases is the one in the back going to the intake manifold was what was said as a general rule on pcv systems on cars similar to ours. Now I check my filters quite often and found that the filter on the drivers side (the filter thats suppose to suck air in) is the one that lets out the most fumes and the filter is slowly becoming pretty disgusting. but the other filter (which has been replaced recently due to brakeage) is pretty clean exept for one spot, maybe its because its new or maybe its because by taking the hose out going into the intake manifold it has no more vacume and the pcv valve cant open anymore so the gases comeout of the wrong end.

Now my key questions are is my theory here acurate at all? If this is really happening this cant exactly be good for the engine? Is my setup in general bad for the engine? Id really hate to let all thaqt sludge go back to the intake manifold so if this works id rather leave it like this plus considering that the summer is close and I plan on turboing then i would def like to leave it like this BUT not at the cost of this being worse for the engine.

Anyone? I researched a lot and mostly people have diff opinions weather what I did is good or bad for the engine. Also what most do agree on is that for turbo engines having a catch can or routing the the pcv to the exhaust is pretty much a must.
Old May 3, 2006 | 01:50 AM
  #2  
flintmicamike's Avatar
Member
5 Year Member
SL Member
 
Joined: Nov 2005
Posts: 65
From: libertyville , il
Default

hey thier is no pcv on our car. most toyota cars dont use them. what the hoses are their for is to dull hot gases and air from the valve area and use it to worm the incoming air to help the engine rum more efficent
Old May 3, 2006 | 02:33 AM
  #3  
ZEROmotorsports's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Dec 2004
Posts: 112
Default

uh there is a pcv on the back of the valve cover, passenger side under the plastic cover
Old May 3, 2006 | 02:35 AM
  #4  
ZEROmotorsports's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Dec 2004
Posts: 112
Default

as for putting a filter on the intake manifold port, u are creating a vacuum leak and would be better off just putting a vacuum cap on it
Old May 3, 2006 | 03:04 AM
  #5  
Typhoon's Avatar
Thread Starter
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Oct 2005
Posts: 507
Default

nono not on the intake manifold that i have vacume cap on iamn talking about where the hoses use to start at from the engine itself i took them both off and put filters on instead of the hoses.
Old May 3, 2006 | 03:47 AM
  #6  
Typhoon's Avatar
Thread Starter
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Oct 2005
Posts: 507
Default

ok well I finally found some more info on this in the least place i thought possible. Mustang forums. To my understanding as long as both of the sides are done you are ok, it converts the system from a positive crank case ventilation to a passive crankcase ventilation and successfully keeps oil out of the intake and manifold while still venting the gases out of the crankcase.

If anyone knows this to be unsafe please post here or pm me and I will appreciate it. Wouldnt want to do anything to damage the engine
Old May 3, 2006 | 09:33 PM
  #7  
flintmicamike's Avatar
Member
5 Year Member
SL Member
 
Joined: Nov 2005
Posts: 65
From: libertyville , il
Default

um no their is not a pvc on it trust me i would know, i work for libertyville toyota as a tech. it is a little metal hose connector that is built into the valve cover. if their was a pcv valve it would say it on the vacume diagram.
Old May 3, 2006 | 09:42 PM
  #8  
Typhoon's Avatar
Thread Starter
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Oct 2005
Posts: 507
Default

^ You might be right Iam not a mechanic but you cant just say it lets hear an explanation. What are the two hoses then that we have that go to the intake manifold and intake tube. If there is no pcv system on our car how does the crankcase pressure get released. You might have a point about the no pcv valve though I looked inside there they seem to use something else.
Old May 3, 2006 | 09:51 PM
  #9  
flintmicamike's Avatar
Member
5 Year Member
SL Member
 
Joined: Nov 2005
Posts: 65
From: libertyville , il
Default

it works by using the vacume made by the intake manifold to pull the gas throught the hose coming from the intake tube through the valve cover and out the other one on the top of the intake manifold.thats why if oyu disconnect the one off the back of the engine your motor should stall out from sucking in to much un metered air.
Old May 3, 2006 | 09:57 PM
  #10  
ScionBandit's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
sIcKsCiOnS
Team ScioNRG
DelMarVa
Scion Evolution
Scion Tuners
 
Joined: Nov 2003
Posts: 4,888
From: SuperiorWash (MD)
Default

Originally Posted by flintmicamike
um no their is not a pvc on it trust me i would know, i work for libertyville toyota as a tech. it is a little metal hose connector that is built into the valve cover. if their was a pcv valve it would say it on the vacume diagram.
2azfe 2.4L has pcv valve, seein as how i replaced one today in a tC

not calling you stupid or anything, just saying
Old May 3, 2006 | 10:13 PM
  #11  
flintmicamike's Avatar
Member
5 Year Member
SL Member
 
Joined: Nov 2005
Posts: 65
From: libertyville , il
Default

well lets compramise. it is noty know as a pcv in our car. it looks more like a check valve to kee gass from going back into the cover
Old May 3, 2006 | 10:31 PM
  #12  
ScionBandit's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
sIcKsCiOnS
Team ScioNRG
DelMarVa
Scion Evolution
Scion Tuners
 
Joined: Nov 2003
Posts: 4,888
From: SuperiorWash (MD)
Default

Originally Posted by flintmicamike
well lets compramise. it is noty know as a pcv in our car. it looks more like a check valve to kee gass from going back into the cover
sounds good
wasn't calling you out or anything, just puttin that info out for others info
Old May 3, 2006 | 10:31 PM
  #13  
Typhoon's Avatar
Thread Starter
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Oct 2005
Posts: 507
Default

i took it out yes, ofcourse youd stall from the hole in the intake manifold thats why its covered on my setup. A pcv valve is a check valve isnt it?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
WRX1316_TcVicent
Scion tC 1G Drivetrain & Power
5
Jul 22, 2021 06:06 PM
yhwhdesign
Scion tC 1G Drivetrain & Power
7
Jun 11, 2021 03:34 PM
Hydryman
Scion tC 1G Owners Lounge
9
Feb 23, 2016 03:35 PM
brett561tc
PPC: Engine / Drivetrain
13
Sep 15, 2015 06:33 AM
Subaru86
Scion FR-S Suspension & Handling
0
Jul 31, 2015 04:33 AM




All times are GMT. The time now is 05:51 AM.