Welcome to the North American Subaru Impreza Owners Club Friday January 27, 2023
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 11-03-2022, 08:55 PM   #1
cproo12
Scooby Newbie
 
Member#: 520219
Join Date: Nov 2020
Chapter/Region: MWSOC
Location: Michigan, USA
Vehicle:
2006 Forester XT 5mt
Crystal Grey Metallic

Question Leaking oil- PCV related?

Hello, it has been almost a year since I rebuilt my heads (fully rebuilt valvetrain, all new valves, etc) and I just noticed an oil leak!


Pictures: (may have to fiddle with link since the forums image hosting is STILL broken...)
https://imgur.com/a/CAaddd2


Ignore all the other garbage wrong with this Subaru like the ****ty exhaust, rust, dirt, etc. I drive this daily and it has 205,000 miles.


I noticed leaking from the timing cover (cam seals) AND valve covers, so welp, must be that my PCV valve (who knows when last replaced) is stuck open and I'm boosting the crankcase, so I pulled the PCV and blew into it- passed the test fine. Shaking it can hear it easily moving back and forth. I replaced it anyways but I don't think that was the problem.


Anyways, is there anything else that would cause all my gaskets to leak like this???


I figure it could just be me being braindead when I rebuilt (it was my first ever rebuild) but I 3d printed a tool for the cam seals, and I followed factory service manual on valve covers. The leak is slow, but it is still there.


Any direction helps!
* Registered users of the site do not see these ads.
cproo12 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-04-2022, 07:32 AM   #2
KillerBMotorsport
NASIOC Vendor
 
Member#: 198281
Join Date: Dec 2008
Chapter/Region: MAIC
Location: Virginia
Vehicle:
2005 WRX/STi
WRB of course

Default

Quote:
Originally Posted by cproo12 View Post
it has 205,000 miles.
^ this might be your answer.

I'd start with a compression and leak-down test. Let's know if you have any excessive blow-by or valves not sealing correctly before chasing your tail down every seal and gasket rabbit hole.
KillerBMotorsport is offline   Reply With Quote
Old 11-04-2022, 09:34 AM   #3
cproo12
Scooby Newbie
 
Member#: 520219
Join Date: Nov 2020
Chapter/Region: MWSOC
Location: Michigan, USA
Vehicle:
2006 Forester XT 5mt
Crystal Grey Metallic

Default

Yeah that's what I'm worried about

You're saying it could be rings wearing down, right? I don't have my compression tester with me but is there another good way to check? There is a pretty good amount of air coming out of the oil fill at idle- but I don't know what is "normal".

I do have an extra ej25 complete shortblock from an 06 STi, but definitely needs some machine shop love. Would be easier to rebuild that then drop it in on a weekend since I daily drive this forester and I work out of a parking lot
cproo12 is offline   Reply With Quote
Old 11-04-2022, 09:39 AM   #4
rtv900
Scooby Guru
 
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:
2016 STI

Default

Why are you worried about that? Is it leaving a puddle, or even a drop under the car or it just kind of oil soaked underneath?
It's a daily with 200k plus miles and I'm guessing it still runs fine right? since you didn't say you are having operating problems
rtv900 is offline   Reply With Quote
Old 11-04-2022, 10:57 AM   #5
cproo12
Scooby Newbie
 
Member#: 520219
Join Date: Nov 2020
Chapter/Region: MWSOC
Location: Michigan, USA
Vehicle:
2006 Forester XT 5mt
Crystal Grey Metallic

Default

Hard to say as if it is dripping it would just burn on the manifold.

Worried about it because I don't want my car to leak oil? I don't think I'm being a perfectionist by worrying about all my oil seals leaking haha. Especially since I just rebuilt it a year ago.

I've driven much worse- just don't want this leak to get any bigger.
cproo12 is offline   Reply With Quote
Old 11-04-2022, 10:58 AM   #6
cproo12
Scooby Newbie
 
Member#: 520219
Join Date: Nov 2020
Chapter/Region: MWSOC
Location: Michigan, USA
Vehicle:
2006 Forester XT 5mt
Crystal Grey Metallic

Default

Hard to say as if it is dripping it would just burn on the manifold.

Worried about it because I don't want my car to leak oil? I don't think I'm being a perfectionist by worrying about all my oil seals leaking haha. Especially since I just rebuilt it a year ago.

I've driven much worse- just don't want this leak to get any bigger.
cproo12 is offline   Reply With Quote
Old 11-04-2022, 11:55 AM   #7
rtv900
Scooby Guru
 
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:
2016 STI

Default

Quote:
Originally Posted by cproo12 View Post
Hard to say as if it is dripping it would just burn on the manifold.

Worried about it because I don't want my car to leak oil? I don't think I'm being a perfectionist by worrying about all my oil seals leaking haha. Especially since I just rebuilt it a year ago.

I've driven much worse- just don't want this leak to get any bigger.
no I get that. I have a 1950 truck leaking from the rear main crank seal and it's annoying to me.
BUUUUUUUT, there's no way in hell I'm doing the amount of disassembly to pull that engine and separate the trans to get to that seal.
Not annoying enough for that.

But if it's worth a lot of work to you sure.
was just curious
rtv900 is offline   Reply With Quote
Old 11-05-2022, 03:44 PM   #8
Max Capacity
Scooby Specialist
 
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
Vehicle:
05 LGT ,09 SpecB
Black/silver

Default

Throw a piece of cardboard under where you park the car and see if your getting oil dripping onto it. If not, at this age I would not worry about it, just keep the oil level topped off.
Max Capacity 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 03:37 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2023 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.