Crankcase Breather - D-series.org

Go Back   D-series.org D-series Knowledge Factory General Tech

D-Series.org is the premier Honda All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 07-20-2017, 08:41 AM   #1 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Unhappy Crankcase Breather

So I yesterday I changed my PCV valve on my Civic EK3 (D15Z6) because my engine was consuming a lot of oil and I also noticed some smoke and I thought it would be the PCV valve that was blocked and the air was comming out by the Crankcase Breather Hose with some oil.

After changing the PCV valve I checked again the Breather Hose and it still blows some air out to the intake with a little of oil.

What should I do to fix it, because the Breather Hose is supposed to suck air into it and it's doing the opposite (blowing air to the intake).
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 07-20-2017, 10:02 AM   #2 (permalink)
\/Your Mom Was Here\/
 
BeerDrinkin's Avatar
 
iTrader: (11)
Join Date: Feb 2010
Location: South of Nashville
Posts: 4,825
Rep Power: 54 BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !
BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !
iTrader Score: 11 reviews
Default

It should be sucking air into the intake through that breather hose, the valve makes sure it's only one way. It sounds like you got a blow by from the piston rings, has the engine ever been overheated or run hot?
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2005 Civic EX Sedan (ES2)



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

You will be missed but not forgotten.

Quote:
I actually jerk off to my rep points, neg rep makes me thumb my bung, what now brown cow? I finished twice.
BeerDrinkin is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 10:17 AM   #3 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Well it overheated once because the fan fuse blew and the fan didn't work but I don't think it was enough to cause engine damage (not sure tho)

I can't post images because I haven't posted enough posts so i'll leave a link with a picture.

i.imgur.com/0j1TF8p.jpg
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 11:48 AM   #4 (permalink)
\/Your Mom Was Here\/
 
BeerDrinkin's Avatar
 
iTrader: (11)
Join Date: Feb 2010
Location: South of Nashville
Posts: 4,825
Rep Power: 54 BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !
BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !BeerDrinkin is on a level you can only DREAM about! ! !
iTrader Score: 11 reviews
Default

The image shows the correct direction of flow. You likely have some blowby form the rings after it got overheated.

__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2005 Civic EX Sedan (ES2)



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

You will be missed but not forgotten.

Quote:
I actually jerk off to my rep points, neg rep makes me thumb my bung, what now brown cow? I finished twice.
BeerDrinkin is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 11:58 AM   #5 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Shouldn't the air be sucked by that hose into the crankcase and exit via PCV valve hose to the intake, isn't that how it should work? That's why some people put those little air filters I guess, but then again, I'm not an engineer and I only know the basic about how engines work.

Is it normal air coming out of the Breather Hose with (a little) oil?
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 12:10 PM   #6 (permalink)
Meat Popsicle
 
Paterico's Avatar
 
iTrader: (14)
Join Date: Jan 2009
Location: San Antonio, TX
Posts: 2,887
Rep Power: 28 Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !
Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !
iTrader Score: 14 reviews
Default

The PCV system is completely stock with the cylinder head cover plumbed to the intake and the block breather/PCV is connected to the intake manifold?
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


R.I.P. Pat Primmer
Paterico is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 12:13 PM   #7 (permalink)
Meat Popsicle
 
Paterico's Avatar
 
iTrader: (14)
Join Date: Jan 2009
Location: San Antonio, TX
Posts: 2,887
Rep Power: 28 Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !
Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !Paterico is on a level you can only DREAM about! ! !
iTrader Score: 14 reviews
Default

Quote:
Originally Posted by BeerDrinkin View Post
The image shows the correct direction of flow. You likely have some blowby form the rings after it got overheated.


Think you've got it backwards mate.

The suction occurs through the vacuum of the intake manifold when the throttle plate is closed.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


R.I.P. Pat Primmer
Paterico is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 12:59 PM   #8 (permalink)
D-series G0D
 
xile6's Avatar
 
iTrader: (9)
Join Date: Apr 2007
Location: Tx
Posts: 6,365
Rep Power: 25 xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!
xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!
iTrader Score: 9 reviews
Default

The way it works is the pcv suck the blowby out the crank case.
The nipple on the valve cover is an inlet for fresh air.
If you look at the oem setup. There is a slash cut in the tube. This slash lets the in coming air be push into the valve cover.

Most people upgrade there tube and it doesnt have this slash on it.

So to recap.
The nipple on the valve cover is an inlet not an outlet.

If you have a ton of press coming from that hose then you have some blowby.
ideally that port should be free of oil and have very little to no pressure on it.

Might wanna clean or get a new pcv hose.
If its still alot then its just to much blow by
__________________
Rep when need.
I also have shopkey if you need diagrams PM me. I am a Wiring Master.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
. RIP

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
xile6 is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 02:34 PM   #9 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Quote:
Originally Posted by xile6 View Post
The way it works is the pcv suck the blowby out the crank case.
The nipple on the valve cover is an inlet for fresh air.
If you look at the oem setup. There is a slash cut in the tube. This slash lets the in coming air be push into the valve cover.

Most people upgrade there tube and it doesnt have this slash on it.

So to recap.
The nipple on the valve cover is an inlet not an outlet.

If you have a ton of press coming from that hose then you have some blowby.
ideally that port should be free of oil and have very little to no pressure on it.

Might wanna clean or get a new pcv hose.
If its still alot then its just to much blow by
Exactly that's what I said that "nipple" on the valve cover is for air entry! But mine is blowing air out, I thought that by changing the PCV valve it would work correctly but it still blowing air out by that breather!! Where might be the problem? Headgasket? or PCV valve HOSE blocked? (because the valve itself is brand new)
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 03:43 PM   #10 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Quote:
Originally Posted by transzex View Post
nipple is for air exit and the fumes get sucked in through the throttle body. Why putting a filter on there is stupid.
like xile6 said, it's a air inlet and not outlet, because it would be stupid to have 2 air outlets...

It's part of the Positive Crankcase Ventilation, air enters by that crankcase breather (that's why people put air filters there), and then exits by the PCV Valve Hose to the intake to be burnt in the cylinder to reduce the emissions to atmosphere.

My problem is that the breather is blowing air instead of sucking, I may have the PCV Valve blocked?
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 07-20-2017, 03:56 PM   #11 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Quote:
Originally Posted by FcoelhoEK3 View Post
My problem is that the breather is blowing air instead of sucking, I may have the PCV Valve blocked?

I meant, I may have the PCV Valve Hose* blocked

Because my PCV Valve is new.
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 07-22-2017, 07:03 PM   #12 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Okay, so I've fixed the problem, the PCV valve hose was blocked and air couldn't pass through it.
Now the PCV system is working how it should

Air enters by the Crankcase Breather and exits through the PCV Valve hose to be burned in the combustion, the oil consumption should now reduce (I hope )
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 07-24-2017, 05:57 AM   #13 (permalink)
DIY Guru
 
BogusSVO's Avatar
 
iTrader: (4)
Join Date: Dec 2014
Location: North Gulf coast Al/Fl
Posts: 637
Rep Power: 13 BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!
BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!BogusSVO is the fucking MAN!!!!
iTrader Score: 4 reviews
Send a message via Yahoo to BogusSVO
Default

Unless you gooped up the oil drain back holes in the pistons behind the oil scraper rings

or

when over heated you lost the tension in the rings


But a leak down test will let you know if you cooked the compression rings , but not if the oil drain holes are clogged
__________________
Quote:
this is probably the best noob weve ever had just pop in and actually be worth his weight
Quote:
BogusSVO nomination for newb of the year 2014, maybe lifetime honorary mention as well.
BogusSVO is offline   Reply With Quote Quick reply to this message
Old 08-20-2017, 04:48 AM   #14 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Okay so it has been a month after fixing the pcv valve problem and the oil change.
Before fixing the problem, doing 200km would reduce the oil level a lot and I've done 600-700km and the oil still on max level and I can't see any smoke coming from the exhaust anymore.

I also noticed a few months ago when I changed my exhaust muffler was small "black" dots on the rear of the car, what could it be? Fuel?
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 08-20-2017, 09:52 PM   #15 (permalink)
D-series soldier
 
iTrader: (0)
Join Date: Jun 2009
Location: IL
Posts: 921
Rep Power: 12 dirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatness
iTrader Score: 0 reviews
Send a message via AIM to dirty d Send a message via Yahoo to dirty d
Default

Unburnt fuel...

If you just route the line to a catch can it won't suck oil into the engine.
dirty d is offline   Reply With Quote Quick reply to this message
Old 08-21-2017, 04:47 AM   #16 (permalink)
n00b
 
FcoelhoEK3's Avatar
 
iTrader: (0)
Join Date: Jul 2017
Posts: 9
Rep Power: 0 FcoelhoEK3 is nobody
iTrader Score: 0 reviews
Default

Quote:
Originally Posted by dirty d View Post
Unburnt fuel...

If you just route the line to a catch can it won't suck oil into the engine.

It's a bit annoying having to clean the rear everytime because of those "black dots" of fuel ? is there any way to avoid that?

When I was searching for a fix for that Oil/PCV problem I thought about the catch can but I don't think there's a need to do that now that the problem is fixed
FcoelhoEK3 is offline   Reply With Quote Quick reply to this message
Old 08-21-2017, 01:02 PM   #17 (permalink)
D-series soldier
 
iTrader: (0)
Join Date: Jun 2009
Location: IL
Posts: 921
Rep Power: 12 dirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatnessdirty d is approaching greatness
iTrader Score: 0 reviews
Send a message via AIM to dirty d Send a message via Yahoo to dirty d
Default

You could make some kind of shroud that goes around the muffler exit to block the gases from going up onto the bumper and bolt it to the bumper. Or get rid of your aftermarket exhaust and put a cat on it.
dirty d is offline   Reply With Quote Quick reply to this message
Old 08-26-2017, 07:33 PM   #18 (permalink)
D-series G0D
 
xile6's Avatar
 
iTrader: (9)
Join Date: Apr 2007
Location: Tx
Posts: 6,365
Rep Power: 25 xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!
xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!xile6 is the fucking MAN!!!!
iTrader Score: 9 reviews
Default

Wax your rear bumper and it will wipe off.

But the reason your getting it is because your running rich.
Normally it happens when you add a header and intake to civics.
Had this happen to my del sol long time ago. Was 90k on the motor.
__________________
Rep when need.
I also have shopkey if you need diagrams PM me. I am a Wiring Master.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
. RIP

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
xile6 is offline   Reply With Quote Quick reply to this message
Old 08-27-2017, 04:59 PM   #19 (permalink)
D-Series cadet
 
Sailor's Avatar
 
iTrader: (0)
Join Date: Nov 2014
Location: Hampshire, England
Posts: 320
Rep Power: 14 Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!
Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!Sailor is the fucking MAN!!!!
iTrader Score: 0 reviews
Default

Quote:
Originally Posted by xile6 View Post
But the reason your getting it is because your running rich.
I agree, even though my experience with Ds is limited.

If the car feels like it's running properly, there's nothing too serious happening. Except that the tune's not right for part of the rev range. I wonder if you've perhaps done enough mods to confuse the ECU?
__________________
Four Hondas: two working


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Sailor is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Tags
d15z6, ek3, pcv

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the D-series.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Security Question
*Required, this field is not shown to others: While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State what kind of animal is mentioned in the sentence above.
Insurance
Please select your insurance company (Optional)

Log-in



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

Posting Rules
You may post new threads
You may 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


iconAll times are GMT -8. The time now is 01:23 AM. | Welcome to Forum, please register to access all of our features.