Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

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 03-31-2012, 02:14 PM   #1
ManualOverAuto
Scooby Specialist
 
Member#: 304662
Join Date: Dec 2011
Chapter/Region: MAIC
Vehicle:
2001 Impreza L coupe
Sedona red Pearl

Default

Changed the air filter today (stock intake with black box, rectangular filter, ect). It was really dirty (should have changed it a while ago) and I noticed 2 or 3 oil burn spots on the filter. About the size of a bottle cap. Again I was told I needed a new one about 9,000 miles ago.

[b]Do you think those oil spots could have been caused by my recent valve cover gasket/tube seal leak and misfire?[b]
* Registered users of the site do not see these ads.

Last edited by ManualOverAuto; 03-31-2012 at 09:45 PM.
ManualOverAuto is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 03-31-2012, 07:31 PM   #2
ManualOverAuto
Scooby Specialist
 
Member#: 304662
Join Date: Dec 2011
Chapter/Region: MAIC
Vehicle:
2001 Impreza L coupe
Sedona red Pearl

Default

Also, I don't have the filter anymore and forgot to take a picture of it.
I tried to get a picture off google to show what it looked like but there's nothing.

So just imagine a dirty filter with some "bottle cap" sized oil spots.

Last edited by ManualOverAuto; 03-31-2012 at 09:23 PM.
ManualOverAuto is offline   Reply With Quote
Old 03-31-2012, 11:12 PM   #3
lolol
Scooby Newbie
 
Member#: 311801
Join Date: Feb 2012
Chapter/Region: NWIC
Location: Portland OR
Default

Sometimes oil gets spat out from valve cover vent
lolol is offline   Reply With Quote
Old 03-31-2012, 11:17 PM   #4
ManualOverAuto
Scooby Specialist
 
Member#: 304662
Join Date: Dec 2011
Chapter/Region: MAIC
Vehicle:
2001 Impreza L coupe
Sedona red Pearl

Default

Quote:
Originally Posted by lolol
Sometimes oil gets spat out from valve cover vent
So it could be regular venting over time or from the recent valve cover gasket failure. That's good to know because I really don't want a hg problem. Not ruling a bad hg out though, I know subi's are notorious for them -_-
ManualOverAuto is offline   Reply With Quote
Old 03-31-2012, 11:37 PM   #5
lolol
Scooby Newbie
 
Member#: 311801
Join Date: Feb 2012
Chapter/Region: NWIC
Location: Portland OR
Default

Quote:
Originally Posted by ManualOverAuto View Post
So it could be regular venting over time or from the recent valve cover gasket failure. That's good to know because I really don't want a hg problem. Not ruling a bad hg out though, I know subi's are notorious for them -_-
Cover gasket leaking won't spit oil into the intake.
lolol is offline   Reply With Quote
Old 04-01-2012, 12:25 AM   #6
ManualOverAuto
Scooby Specialist
 
Member#: 304662
Join Date: Dec 2011
Chapter/Region: MAIC
Vehicle:
2001 Impreza L coupe
Sedona red Pearl

Default

Quote:
Originally Posted by lolol
Cover gasket leaking won't spit oil into the intake.
So spark plug tube seals won't either?

Damn, you got my hopes up for nothing. So hopefully it is just from the filter being super old, and not a hg problem. I should know about a hg issue when I send out my oil to Blackstone here shortly.
ManualOverAuto is offline   Reply With Quote
Old 04-01-2012, 05:46 PM   #7
lolol
Scooby Newbie
 
Member#: 311801
Join Date: Feb 2012
Chapter/Region: NWIC
Location: Portland OR
Default

Quote:
Originally Posted by ManualOverAuto View Post
So spark plug tube seals won't either?
No, they won't.
Search the web for "oil in intake manifold"

Oil comes form crank case or valve cover and these connections are for emission control. Overfilled oil, normal oil splashing up the lines cause oil getting spit into intake.

Check to see that oil isn't overfilled. I read here that oil level is hard to read on some Subarus due to difficulty getting a stable reading on the dipstick.

Check that PCV hose and valve are in good order. Replace air filter and observe.
lolol is offline   Reply With Quote
Old 04-01-2012, 07:30 PM   #8
ManualOverAuto
Scooby Specialist
 
Member#: 304662
Join Date: Dec 2011
Chapter/Region: MAIC
Vehicle:
2001 Impreza L coupe
Sedona red Pearl

Default

Quote:
Originally Posted by lolol
No, they won't.
Search the web for "oil in intake manifold"

Oil comes form crank case or valve cover and these connections are for emission control. Overfilled oil, normal oil splashing up the lines cause oil getting spit into intake.

Check to see that oil isn't overfilled. I read here that oil level is hard to read on some Subarus due to difficulty getting a stable reading on the dipstick.

Check that PCV hose and valve are in good order. Replace air filter and observe.
That's where you confuse me lol. You said that oil can come from the crankcase or valve cover. If I had a valve cover gasket leak why wouldn't that explain the oil spots?

Anyway it's not from an overfill. When the old air filter was in, the oil level was fine.

Checking the pcv valve in the next few days. Whenever I get the chance really, cause it seems pretty easy from what I've seen/read.

Last edited by ManualOverAuto; 04-02-2012 at 12:30 AM.
ManualOverAuto is offline   Reply With Quote
Old 04-02-2012, 05:15 PM   #9
ManualOverAuto
Scooby Specialist
 
Member#: 304662
Join Date: Dec 2011
Chapter/Region: MAIC
Vehicle:
2001 Impreza L coupe
Sedona red Pearl

Default

Replaced the pcv valve today. Super easy, and $7. The old one was pretty gunked up, although it still rattled just a little. Put in a fresh one anyway, so during the next oil change I'll check the air filter and see how it looks.

While trying to screw it in I did drop it down into the engine, ha. That was the hardest part of the whole thing, trying to squeeze my hand down there to retrieve it.

So thanks for the tip.

Last edited by ManualOverAuto; 04-02-2012 at 10:58 PM.
ManualOverAuto is offline   Reply With Quote
Old 04-02-2012, 09:39 PM   #10
lolol
Scooby Newbie
 
Member#: 311801
Join Date: Feb 2012
Chapter/Region: NWIC
Location: Portland OR
Default

Quote:
Originally Posted by ManualOverAuto View Post
. If I had a valve cover gasket leak why wouldn't that explain the oil spots?
Valve cover vent connects the space under the cover into intake. Cover gasket seals between the cover and the cylinder head. If the gasket leaks, oil would leak along the side of the engine and drip on the ground, not into the intake.

As camshaft and valves dance around, oil splashes around inside the case. Some mist gets carried into the vent hose connected to intake.

Make sense?
lolol is offline   Reply With Quote
Old 04-02-2012, 10:57 PM   #11
ManualOverAuto
Scooby Specialist
 
Member#: 304662
Join Date: Dec 2011
Chapter/Region: MAIC
Vehicle:
2001 Impreza L coupe
Sedona red Pearl

Default

Quote:
Originally Posted by lolol

Valve cover vent connects the space under the cover into intake. Cover gasket seals between the cover and the cylinder head. If the gasket leaks, oil would leak along the side of the engine and drip on the ground, not into the intake.

As camshaft and valves dance around, oil splashes around inside the case. Some mist gets carried into the vent hose connected to intake.

Make sense?
Yea I see what you mean now.

So when the pcv valve gets sticky or clogged that mist is forced somewhere else causing potential problems?

Also, my valve cover gasket didn't leak to the outside. It was all inside, but there was also leaky plug seals.

Last edited by ManualOverAuto; 04-02-2012 at 11:21 PM.
ManualOverAuto 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil on air filter AND spark plug boots karst Normally Aspirated Powertrain 6 11-01-2008 12:46 AM
Is it normal to have large oil deposit on air filter @ 24K? atlblu Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 4 03-26-2008 10:39 AM
oil pump removal = air filter? sepharad 'Old School' Subaru Forum 12 09-18-2007 08:57 AM
burnt oil on air filter BlackoutWRX Newbies & FAQs 8 05-13-2005 09:54 PM
car wants to stall after oil change, new air filter DoinkMobb Normally Aspirated Powertrain 10 06-24-2001 06:32 PM

All times are GMT -4. The time now is 03:16 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.