Kia Forum banner
1 - 20 of 22 Posts

· Registered
1999 Kia Sportage 4x4
Joined
·
9 Posts
Discussion Starter · #1 ·
Hey guys!! I was replacing my valve cover gasket and broke a little part. I have no idea what it is called and was hoping for some help. This is a 99 Kia Sportage 4x4 with manual transmission. Thank you in advance. She is my daily driver so I need to get her "Mud" put back together asap!! ☺
Engine Auto part Vehicle Car Automotive engine part
 

· Registered
09 kia spectra ex,'11 Dodge Journey AWD,04 Chry. T&C, 08 Pontiac G6 gt
Joined
·
2,510 Posts
Your arrow is pointing to the PCV VALVE and the rubber hose is the hose that connects vacuum air from the intake manifold to the valve, Left cracked or unhooked, it will cause idle rpm problems.
 

· Registered
2013 Kia Rio Sedan Auto 1.6 Turbo // 2020 Sportage LX FWD
Joined
·
527 Posts
yes crank case ventilation. tap it, put a threaded barb on it, and reattach the vacuum line (if you broke the nipple off the valve cover)
 
  • Like
Reactions: justakiri

· Registered
1999 Kia Sportage 4x4
Joined
·
9 Posts
Discussion Starter · #6 ·
Your arrow is pointing to the PCV VALVE and the rubber hose is the hose that connects vacuum air from the intake manifold to the valve, Left cracked or unhooked, it will cause idle rpm problems.
thank you soo much!! where my PCV valve was located was my next question. i have a new one to put on it as well!!
 

· Administrator
Joined
·
12,633 Posts

· Registered
2013 Kia Rio Sedan Auto 1.6 Turbo // 2020 Sportage LX FWD
Joined
·
527 Posts
yea you need a vac line pcv that just goes on a vac line it's just a one way valve. Maybe ron can enlighten me as to why you need one on a non turbo car (because the intake manifold is always vaccum) (not a evap purge valve ron, but a pcv)
 

· Administrator
Joined
·
12,633 Posts
Your arrow is pointing to the PCV VALVE and the rubber hose is the hose that connects vacuum air from the intake manifold to the valve, Left cracked or unhooked, it will cause idle rpm problems.
yea you need a vac line pcv that just goes on a vac line it's just a one way valve. Maybe ron can enlighten me as to why you need one on a non turbo car (because the intake manifold is always vaccum) (not a evap purge valve ron, but a pcv)
What makes you think natural aspirated engines don't use a PCV check valve?

one way valve = check valve = PCV valve

Google is your friend.


 
  • Like
Reactions: justakiri

· Registered
09 kia spectra ex,'11 Dodge Journey AWD,04 Chry. T&C, 08 Pontiac G6 gt
Joined
·
2,510 Posts
i dunno guys, but what i broke was the pcv valve itself. i pulled the hose off and opened my new pcv valve and compared. just gotta get the new one in now. thank y'all!!
I understood that from your first post and responded correctly to you. I think member rio-t was on the same thought but was suggesting a cheap fix verses just replacing the PCV Valve itself. It is NOT "just a one way valve" but a metered opening also to not draw off too much vacuum of the running motor.
Yes replace the PCV Valve and all should be good to finish your maintenance task with your ride. :)
 

· Registered
2013 Kia Rio Sedan Auto 1.6 Turbo // 2020 Sportage LX FWD
Joined
·
527 Posts
That nipple (elbow) is the PCV
I understand what it dose friend, what I don't understand is why it would ever need to be closed. The need for a one way valve in a turbo car is because under boost the manifold is positive pressure, and you don't want to push that air into the crank case, so there is a NEED for a one way valve (one pull no push). That isn't the case on an NA car. I have seen plenty of people retap the pcv thread for a larger line and delete the valve alltogether. Why would that be an issue?
 

· Administrator
Joined
·
12,633 Posts
I understand what it dose friend, what I don't understand is why it would ever need to be closed. The need for a one way valve in a turbo car is because under boost the manifold is positive pressure, and you don't want to push that air into the crank case, so there is a NEED for a one way valve (one pull no push). That isn't the case on an NA car. I have seen plenty of people retap the pcv thread for a larger line and delete the valve alltogether. Why would that be an issue?
At idle, the manifold vacuum is high, which would draw in a large quantity of crankcase gases, causing the engine to run too lean. The PCV valve closes when the manifold vacuum is high, restricting the quantity of crankcase gases entering the intake system.[9]

 

· Registered
2013 Kia Rio Sedan Auto 1.6 Turbo // 2020 Sportage LX FWD
Joined
·
527 Posts
I understood that from your first post and responded correctly to you. I think member rio-t was on the same thought but was suggesting a cheap fix verses just replacing the PCV Valve itself. It is NOT "just a one way valve" but a metered opening also to not draw off too much vacuum of the running motor.
Yes replace the PCV Valve and all should be good to finish your maintenance task with your ride. :)
I was unaware too much vacuum could occur. But tbh the cars I've seen delete the valve are road race cars always running at high rpm (where you want as much evacuation as possible, hints the tapping to a larger diameter) I could see how you could suck too much oil for regular use tho, thank you for the reply as always
 

· Registered
09 kia spectra ex,'11 Dodge Journey AWD,04 Chry. T&C, 08 Pontiac G6 gt
Joined
·
2,510 Posts
I understand what it dose friend, what I don't understand is why it would ever need to be closed. The need for a one way valve in a turbo car is because under boost the manifold is positive pressure, and you don't want to push that air into the crank case, so there is a NEED for a one way valve (one pull no push). That isn't the case on an NA car. I have seen plenty of people retap the pcv thread for a larger line and delete the valve alltogether. Why would that be an issue?
I explained why in my last post. A straight line eliminating the valve will draw off too much vacuum and suck too much oil fume.
 

· Registered
2013 Kia Rio Sedan Auto 1.6 Turbo // 2020 Sportage LX FWD
Joined
·
527 Posts
At idle, the manifold vacuum is high, which would draw in a large quantity of crankcase gases, causing the engine to run too lean. The PCV valve closes when the manifold vacuum is high, restricting the quantity of crankcase gases entering the intake system.[9]

I don't think I understand how it would cause lean condition, because it is metered air. but hey, I thought vacuum increased with revs so maybe I'm just dumb. My thought was more revs = more vacuum = less crank case pressure. My understanding is ideally crank case pressure would always be under vacuum.
 

· Registered
1999 Kia Sportage 4x4
Joined
·
9 Posts
Discussion Starter · #18 ·
oh, ok. i understand fully now.
again, thank you soo much for the quick reply. i thought i was going to have to order parts and wait. you're a lifesaver!!

I understood that from your first post and responded correctly to you. I think member rio-t was on the same thought but was suggesting a cheap fix verses just replacing the PCV Valve itself. It is NOT "just a one way valve" but a metered opening also to not draw off too much vacuum of the running motor.
Yes replace the PCV Valve and all should be good to finish your maintenance task with your ride. :)
 

· Registered
09 kia spectra ex,'11 Dodge Journey AWD,04 Chry. T&C, 08 Pontiac G6 gt
Joined
·
2,510 Posts
I don't think I understand how it would cause lean condition, because it is metered air. but hey, I thought vacuum increased with revs so maybe I'm just dumb. My thought was more revs = more vacuum = less crank case pressure. My understanding is ideally crank case pressure would always be under vacuum.
Nothing like HIJACKING an already well taken care of thread. This is NOT helpful to the original poster or others that may come searching for the same original problem later. Take this theory debate to a new thread in the off topic page.
 

· Administrator
Joined
·
12,633 Posts
I don't think I understand how it would cause lean condition, because it is metered air.
Air entering the intake manifold through the PCV system is unmetered because its after the MAF, but on models that use MAP's it would not be an issue.
but hey, I thought vacuum increased with revs so maybe I'm just dumb. My thought was more revs = more vacuum = less crank case pressure. My understanding is ideally crank case pressure would always be under vacuum.
Visualize at idle the pistons on their intake stroke are sucking air against a closed throttle butterfly causing high vacuum in the intake manifold, and with wide open throttle the intake manifold will be at atmospheric pressure.

The intent is to keep just a slight vacuum on the crankcase.
 
  • Like
Reactions: rio-t
1 - 20 of 22 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top