Welcome to the North American Subaru Impreza Owners Club Thursday September 18, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 11-18-2012, 12:49 AM   #1
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default Oil Consumption Under Boost?

Ok, So I have researched and looked and need an answer.

If I hammer on the car I get pretty bad oil consumption. I'm currently using Kandall 5W40 Synthetic (apparently highly regarded). Before the Catch Can I noticed my intercooler was caked with oil, as well as my turbo. All coming from blow by. So I added a Catch Can (no more oil in intercooler). Now that the can is in I'm still losing a lot of oil (1 quart) in about 1000km's or less. But here is the catch, it's not in the can, but to be frank I have put those metal scrubbing pad so Its probably gunked up in there).

So...Can the oil be crappy and deteriorating/burnt up (I have no clue)?

Anywho I'm going to switch to T6 5w40 tomorrow.

-My car fires up very fast on a cold start (0c, coldest so far)
-No Smoke from the Oil Cap
-No white smoke from the tail pipe after condensation disappears (no cats)
-If I don't go into boost, I don't consume.

I should do a compression/leak down test and possibly cry.

What do you guys think?
* Registered users of the site do not see these ads.
OC_Nooby is offline   Reply With Quote
Old 11-18-2012, 02:44 AM   #2
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

change the pcv valve
Uncle Scotty is offline   Reply With Quote
Old 11-18-2012, 09:21 AM   #3
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Quote:
Originally Posted by Uncle Scotty View Post
change the pcv valve
PCV has been removed from the motor.
OC_Nooby is offline   Reply With Quote
Old 11-18-2012, 06:46 PM   #4
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

Quote:
Originally Posted by OC_Nooby View Post
PCV has been removed from the motor.


well then...i guess you figured out the issue, then didnt ya
Uncle Scotty is offline   Reply With Quote
Old 11-18-2012, 09:03 PM   #5
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Quote:
Originally Posted by Uncle Scotty View Post


well then...i guess you figured out the issue, then didnt ya
What I ment to say was that from the vacuum/boost source from the manifold in which the PCV system hooked up to has been bolted shut. Then the PCV valve was removed and also bolted shut. I have a breather hose from the block routed near the radiator (needs a can seteup there) and have a hose coming from the collector of the heads going to a catch can. So my intake doesn't have any oil being routed back in incase of blow by.
OC_Nooby is offline   Reply With Quote
Old 11-18-2012, 09:18 PM   #6
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

Quote:
Originally Posted by OC_Nooby View Post
What I ment to say was that from the vacuum/boost source from the manifold in which the PCV system hooked up to has been bolted shut. Then the PCV valve was removed and also bolted shut. I have a breather hose from the block routed near the radiator (needs a can seteup there) and have a hose coming from the collector of the heads going to a catch can. So my intake doesn't have any oil being routed back in incase of blow by.

you are gonna blow something up doin that

really

ya dont know what you are doing
Uncle Scotty is offline   Reply With Quote
Old 11-18-2012, 09:23 PM   #7
eg33GC
Scooby Specialist
 
Member#: 206851
Join Date: Mar 2009
Chapter/Region: MWSOC
Vehicle:
99 V4
EJ20K RS

Default

Quote:
Originally Posted by OC_Nooby View Post
What I ment to say was that from the vacuum/boost source from the manifold in which the PCV system hooked up to has been bolted shut. Then the PCV valve was removed and also bolted shut. I have a breather hose from the block routed near the radiator (needs a can seteup there) and have a hose coming from the collector of the heads going to a catch can. So my intake doesn't have any oil being routed back in incase of blow by.
you really need to stop what youre doing and replace the system back to its config
eg33GC is offline   Reply With Quote
Old 11-18-2012, 10:36 PM   #8
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

I was told to do it this way. Whats wrong with this setup. I may not have worded it correctly.

Crankcase venting (eventually will go to catch can) and head breathers to catch can. At vacuum since the PCV valve has been removed the crankcase fumes are not being sucked back into the motor but venting.

Last edited by OC_Nooby; 11-18-2012 at 11:12 PM.
OC_Nooby is offline   Reply With Quote
Old 11-19-2012, 09:43 PM   #9
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Still wondering?
OC_Nooby is offline   Reply With Quote
Old 11-20-2012, 05:32 PM   #10
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Uncle Scotty? eg33GC? Can you explain why? You both seem to have the same opinions and id just like to hear why.
OC_Nooby is offline   Reply With Quote
Old 11-20-2012, 06:42 PM   #11
Ferris1977
Scooby Newbie
 
Member#: 311629
Join Date: Feb 2012
Default oil

Crawford would be the best to get?
Ferris1977 is offline   Reply With Quote
Old 11-20-2012, 07:31 PM   #12
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

My issue isn't with the catch can, I'm curious as to why its bad to just remove the pcv valve and keep everything else in tact.
OC_Nooby is offline   Reply With Quote
Old 12-06-2012, 06:43 PM   #13
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Well I ran the car for 400km's and would say I consumed about 100 ml - 200 ml. I was driving the car slowly but there where moments where it was under heavy loads going uphill but not going into boost. I've been driving the car now under boost for 50km's and I can't get a very accurate reading, I'm sure its down. Tomorrow I'll be doing the leak/compression test and get this over with.

eg33GC/Uncle Scotty if your going to say not to do something why not explain why not to do it? I've been reading around and I really don't know why the stock PCV system can't be routed the way I have it, minus the emissions...
OC_Nooby is offline   Reply With Quote
Old 12-06-2012, 06:51 PM   #14
Frank-i-e
Scooby Specialist
 
Member#: 316463
Join Date: Apr 2012
Location: Houston, Texas
Vehicle:
2005 STi
World Rally Blue

Default

It is bad because you're building pressure in the crank case and there is nothing the motor can do to release pressure because it's valve is missing!
Frank-i-e is offline   Reply With Quote
Old 12-06-2012, 07:10 PM   #15
bhinak
Scooby Newbie
 
Member#: 300026
Join Date: Nov 2011
Chapter/Region: AKIC
Location: Palmer/Wasilla, Alaska
Default

^wrong. He is venting it to atmosphere.
bhinak is offline   Reply With Quote
Old 12-06-2012, 07:11 PM   #16
bhinak
Scooby Newbie
 
Member#: 300026
Join Date: Nov 2011
Chapter/Region: AKIC
Location: Palmer/Wasilla, Alaska
Default

No valve means constantly relieving pressure. So no buildup.
bhinak is offline   Reply With Quote
Old 12-06-2012, 08:09 PM   #17
Frank-i-e
Scooby Specialist
 
Member#: 316463
Join Date: Apr 2012
Location: Houston, Texas
Vehicle:
2005 STi
World Rally Blue

Default

Quote:
Originally Posted by OC_Nooby View Post

What I ment to say was that from the vacuum/boost source from the manifold in which the PCV system hooked up to has been bolted shut. Then the PCV valve was removed and also bolted shut.
Quote:
Originally Posted by bhinak View Post
^wrong. He is venting it to atmosphere.
He said it was bolted shut...?
Frank-i-e is offline   Reply With Quote
Old 12-06-2012, 10:37 PM   #18
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

Quote:
Originally Posted by Frank-i-e View Post
He said it was bolted shut...?

yeppers

people dont know what they are doing and get it all wrong and blow their **** UP
Uncle Scotty is offline   Reply With Quote
Old 12-07-2012, 06:10 PM   #19
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Crankcase to atmosphere, heads to catch can. Crankcase is not bolted SHUT!, THE PCV hooks up to the manifold and the T in the crankcase. So the PCV is removed and the manifold has a bolt and the T has a bolt.
OC_Nooby is offline   Reply With Quote
Reply

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
Forum Jump


All times are GMT -4. The time now is 01:14 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.