Welcome to the North American Subaru Impreza Owners Club Wednesday July 23, 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 > Built Motor Discussion

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 02-20-2013, 10:44 PM   #1
ScoobieRex2.0
Scooby Newbie
 
Member#: 310009
Join Date: Feb 2012
Chapter/Region: Tri-State
Location: CT
Vehicle:
03 WRX
MBP

Default Pouring blue smoke at idle

As title states I have a ton of oil burning and blue smoke coming out the exhaust at idle. I don't notice it at any other time but idle. What cuases blue smoke at idle. Would like adobe first before compression test.
* Registered users of the site do not see these ads.
ScoobieRex2.0 is offline   Reply With Quote
Old 02-20-2013, 11:59 PM   #2
rymaggi
Scooby Specialist
 
Member#: 253442
Join Date: Jul 2010
Chapter/Region: BAIC
Location: El Dorado Hills / Folsom / Sac
Vehicle:
2006 V7 Sti 6speed
Built motor 20g // 446whp

Default

coolant blow by.
rymaggi is offline   Reply With Quote
Old 02-21-2013, 12:03 AM   #3
68Cadillac
Scooby Specialist
 
Member#: 95901
Join Date: Sep 2005
Chapter/Region: SWIC
Location: Las Vegas, USA
Default

Coolant burns white.

Oil burns bluish white.

Black smoke means you're running rich.

For you OP you're turbo oil seals may be going.
68Cadillac is offline   Reply With Quote
Old 02-21-2013, 12:43 AM   #4
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Check your downpipe and intercooler for oil. If the car only burns oil at start up/cold start it could be a valve seal. I couldn't see any situation where the car only burns oil at idle and only idle. It would/should get worse with revs/engine load.
OC_Nooby is offline   Reply With Quote
Old 02-21-2013, 01:12 AM   #5
Paul
Scooby Guru
 
Member#: 56203
Join Date: Feb 2004
Chapter/Region: Tri-State
Location: south nj
Vehicle:
00 RSTI Coupe
Twin Scroll 2.5XTR EJ207

Default

maybe turbo.. Take the oil cap off while idling if smoke comes pouring out its the motor
Paul is online now   Reply With Quote
Old 02-21-2013, 05:01 PM   #6
ScoobieRex2.0
Scooby Newbie
 
Member#: 310009
Join Date: Feb 2012
Chapter/Region: Tri-State
Location: CT
Vehicle:
03 WRX
MBP

Default

Note: Checked the oil the other day after it was sitting cold for quite some time and found it almost dry so I added about 3 quarts to it. Checked it again the day after and it's reading about an inch above the full line. I didn't understand it.

Also: broke the motor in with 10-30 oil with ZDDP additive. Changed the oil to rotella t6 @ 1k the day after I got a tune. Prior to the tune and oil change I did not notice the smoke. Not sure if this would provide any useful insight or not.
ScoobieRex2.0 is offline   Reply With Quote
Old 02-21-2013, 05:03 PM   #7
Junior2JZ
Scooby Guru
 
Member#: 64908
Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies @ P&L
Vehicle:
10.8 XT+10.0@143 GR+
9.0@170mph GTR

Default

stock motor or built?

Smoke at idle can be valve seals, but if it started after a tune.. I would consider possible short block damage
Junior2JZ is offline   Reply With Quote
Old 02-21-2013, 05:04 PM   #8
Junior2JZ
Scooby Guru
 
Member#: 64908
Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies @ P&L
Vehicle:
10.8 XT+10.0@143 GR+
9.0@170mph GTR

Default

http://forums.nasioc.com/forums/show....php?t=2468364

After reading your 117% IDC I would go with a melted piston, cracked ring.. Especially in the cold ass weather the NE has been seeing
Junior2JZ is offline   Reply With Quote
Old 02-21-2013, 08:58 PM   #9
Paul
Scooby Guru
 
Member#: 56203
Join Date: Feb 2004
Chapter/Region: Tri-State
Location: south nj
Vehicle:
00 RSTI Coupe
Twin Scroll 2.5XTR EJ207

Default

^ouch...that will do it.
Paul is online now   Reply With Quote
Old 02-21-2013, 11:03 PM   #10
ScoobieRex2.0
Scooby Newbie
 
Member#: 310009
Join Date: Feb 2012
Chapter/Region: Tri-State
Location: CT
Vehicle:
03 WRX
MBP

Default

Quote:
Originally Posted by Junior2JZ View Post
http://forums.nasioc.com/forums/show....php?t=2468364

After reading your 117% IDC I would go with a melted piston, cracked ring.. Especially in the cold ass weather the NE has been seeing
Would this cause smoke from the oil fill/cap as well? I hope it's a valve although either way, unless its just from an overfill, it's $$$$
ScoobieRex2.0 is offline   Reply With Quote
Old 02-21-2013, 11:22 PM   #11
Nuke209
Scooby Specialist
 
Member#: 108089
Join Date: Feb 2006
Chapter/Region: MWSOC
Location: Minnesota
Vehicle:
2003 WRX
NF Performance

Default

Sure it's not the turbo? j/w
Nuke209 is offline   Reply With Quote
Old 02-22-2013, 12:07 AM   #12
rymaggi
Scooby Specialist
 
Member#: 253442
Join Date: Jul 2010
Chapter/Region: BAIC
Location: El Dorado Hills / Folsom / Sac
Vehicle:
2006 V7 Sti 6speed
Built motor 20g // 446whp

Default

My valves are leaky, gonna need a rebuild in the next 15-25k. So I get blue ish white smoke on start up. Could be your rings giving out like mine.
rymaggi is offline   Reply With Quote
Old 02-22-2013, 05:04 PM   #13
Junior2JZ
Scooby Guru
 
Member#: 64908
Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies @ P&L
Vehicle:
10.8 XT+10.0@143 GR+
9.0@170mph GTR

Default

Quote:
Originally Posted by ScoobieRex2.0 View Post
Would this cause smoke from the oil fill/cap as well? I hope it's a valve although either way, unless its just from an overfill, it's $$$$
If you have the smoke from the fill cap, then yes.. you have more then likely collapased, cracked or melted a piston.
Junior2JZ is offline   Reply With Quote
Old 02-22-2013, 08:34 PM   #14
ScoobieRex2.0
Scooby Newbie
 
Member#: 310009
Join Date: Feb 2012
Chapter/Region: Tri-State
Location: CT
Vehicle:
03 WRX
MBP

Default

What about a floating intake valve? I lve been hearing a whining noise in boost around 4k rpm. Thought it was a boost leak so I redid all IC and intake hoses. Didn't see much oil in the process. I get a good amount if engine noise at idle but nothing crazy and definitely don't think it's not since its not heard throughout he band.
ScoobieRex2.0 is offline   Reply With Quote
Old 02-22-2013, 08:49 PM   #15
Paul
Scooby Guru
 
Member#: 56203
Join Date: Feb 2004
Chapter/Region: Tri-State
Location: south nj
Vehicle:
00 RSTI Coupe
Twin Scroll 2.5XTR EJ207

Default

Dude if you have a decent amount of smoke coming from the oil filler your motor is toast. Like Jr said most likly a piston. Its sucks but pull the motor and see what the damage is.
Paul is online now   Reply With Quote
Old 02-22-2013, 09:39 PM   #16
wrxsubiemod
Scooby Specialist
 
Member#: 165104
Join Date: Nov 2007
Chapter/Region: SCIC
Location: name where you like it
Vehicle:
E85 SoCalPorting
Phatron tuned

Default

Quote:
Originally Posted by ScoobieRex2.0 View Post
What about a floating intake valve? I lve been hearing a whining noise in boost around 4k rpm. Thought it was a boost leak so I redid all IC and intake hoses. Didn't see much oil in the process. I get a good amount if engine noise at idle but nothing crazy and definitely don' think it's not since its not heard throughout he band.
Sounds like a turbo if Its whining
wrxsubiemod is offline   Reply With Quote
Old 02-22-2013, 09:43 PM   #17
jaxscuby
Sammo Hung
Moderator
 
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: F L O R I D A
Vehicle:
2002 USDM WRX
WRB

Default

maybe both, blown turbo and melted piston.

you won't really know until you take it apart.

compression test will tell which piston is toast.

leak down test might also tell you which cylinder is toast.
jaxscuby is offline   Reply With Quote
Old 02-23-2013, 03:05 AM   #18
ScoobieRex2.0
Scooby Newbie
 
Member#: 310009
Join Date: Feb 2012
Chapter/Region: Tri-State
Location: CT
Vehicle:
03 WRX
MBP

Default

Quote:
Originally Posted by wrxsubiemod View Post
Sounds like a turbo if Its whining
Yea but its coming from the driver's side. Not the turbo. Sounds like TMIC noise.
ScoobieRex2.0 is offline   Reply With Quote
Old 02-23-2013, 01:01 PM   #19
rymaggi
Scooby Specialist
 
Member#: 253442
Join Date: Jul 2010
Chapter/Region: BAIC
Location: El Dorado Hills / Folsom / Sac
Vehicle:
2006 V7 Sti 6speed
Built motor 20g // 446whp

Default

Just take it to a reputable shop. Have a leak down and compression test. That will tell you
rymaggi is offline   Reply With Quote
Old 04-13-2013, 07:39 PM   #20
ScoobieRex2.0
Scooby Newbie
 
Member#: 310009
Join Date: Feb 2012
Chapter/Region: Tri-State
Location: CT
Vehicle:
03 WRX
MBP

Default

So no one has ever had or heard of blue smoke only at idle? There is NO smoke coming out of the oil filler. I am using rotella T6 5w40. Should I try a thicker oil? 5w50? I replaced the PCV valve and check the turbo (no shaft play whatsoever). I haven't gotten around to compression test yet. There is no oil in my coolant or vice versa. I have heard that these motor are NOT typically known for valve seal failure. I do however have a question about my heads (I know souls have gotten them inspected before the swap). One of the valves, not sure if on the intake side or exhaust side, had a bit of play to it. I noticed I while cleaning that it would rotate slightly (from left to right) with enough pressure. Would this or should this have been a cause of concern? If so would that indicate a bad guide/seal?
ScoobieRex2.0 is offline   Reply With Quote
Old 04-13-2013, 10:47 PM   #21
grandchrist
Scooby Newbie
 
Member#: 335037
Join Date: Oct 2012
Chapter/Region: E. Canada
Location: quebec, canada (speak french)
Vehicle:
1999 rs
white

Default

my car did exactly the same thing than your and it appear to be a bad valve seal
(take of the manifold and look in the head port if the valves shaft look oily cause mine was)
grandchrist is online now   Reply With Quote
Old 04-13-2013, 11:46 PM   #22
bswilmington
Scooby Specialist
 
Member#: 217563
Join Date: Jul 2009
Chapter/Region: South East
Location: Eden NC
Vehicle:
2006 Sti 12.68 @ 108
321WHP 422WTQ dynojet SAE

Default

Quote:
Originally Posted by ScoobieRex2.0 View Post
So no one has ever had or heard of blue smoke only at idle?
I did, cracked ringlanding. Car would only smoke at idle and the hotter I got the motor(racing it), the more it would smoke at idle. When sitting in staging area it would blow massive amounts of smoke. If I drove normal, the car would only have puff or 2 at idle and not really appear there was a problem.


Vacuum would also flutter at idle. It almost acted like bad valve stem seal, but it had massive amounts of blowby. Ran like a champ until it died
bswilmington is offline   Reply With Quote
Old 04-14-2013, 10:08 PM   #23
grandchrist
Scooby Newbie
 
Member#: 335037
Join Date: Oct 2012
Chapter/Region: E. Canada
Location: quebec, canada (speak french)
Vehicle:
1999 rs
white

Default

so have you found your trouble
grandchrist is online now   Reply With Quote
Old 04-15-2013, 05:23 PM   #24
ScoobieRex2.0
Scooby Newbie
 
Member#: 310009
Join Date: Feb 2012
Chapter/Region: Tri-State
Location: CT
Vehicle:
03 WRX
MBP

Default

Quote:
Originally Posted by bswilmington View Post
I did, cracked ringlanding. Car would only smoke at idle and the hotter I got the motor(racing it), the more it would smoke at idle. When sitting in staging area it would blow massive amounts of smoke. If I drove normal, the car would only have puff or 2 at idle and not really appear there was a problem.


Vacuum would also flutter at idle. It almost acted like bad valve stem seal, but it had massive amounts of blowby. Ran like a champ until it died
Did you experience smoke from the filler tube?

No I have not figure out the problem yet.
ScoobieRex2.0 is offline   Reply With Quote
Old 04-15-2013, 06:09 PM   #25
bswilmington
Scooby Specialist
 
Member#: 217563
Join Date: Jul 2009
Chapter/Region: South East
Location: Eden NC
Vehicle:
2006 Sti 12.68 @ 108
321WHP 422WTQ dynojet SAE

Default

Yes. I had a lot of ring blowby.
bswilmington 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 09:35 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.