Welcome to the North American Subaru Impreza Owners Club Thursday November 27, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Vancouver Impreza Club
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 Chapters > Vancouver Impreza Club Forum -- VIC

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 06-23-2014, 09:11 AM   #1
deadhero15
Scooby Newbie
 
Member#: 385146
Join Date: Mar 2014
Question REAR Differential LEAKS Question for 2011 STI PLEASE i need some Advice.

Hi guys, yesterday i just noticed theres a oil build up around my REAR diffs

anyone have this issue? i read some other forum that theres a Air/ oil VENT on top of the REAR diff case. and the car just had rear diff oil change @ HPL Autosport. 53,000kms and im at 60,000kms and i just notice oil build up just now. im just worried. can it be because it was overfilled??

thnx guys --hero
* Registered users of the site do not see these ads.
deadhero15 is offline   Reply With Quote
Old 06-23-2014, 02:10 PM   #2
mrjason
Scooby Newbie
 
Member#: 110929
Join Date: Mar 2006
Chapter/Region: VIC
Location: Burnaby
Vehicle:
2004 STI
WRB

Default

If it was over filled during filling, it would have leaked out while they put the bolt back in.
There is a vent on the top, but normally that's accompanied by a hose that will terminate some where and allow air in and out - not fluid and it wont be at the diff its self.

If its cracked. That would be my only concern. Maybe they didnt torque the bolt down enough and its seeping.

Take a picture of it and try to get it off the ground.

Beauty of a rear diff is they are easy to re-seal if in fact that's what happened.
mrjason is offline   Reply With Quote
Old 06-23-2014, 04:26 PM   #3
yap
Scooby Newbie
 
Member#: 209685
Join Date: Apr 2009
Location: Vancouver
Vehicle:
2004 STI

Default

the vent is actually right on top of the dif with no hose at all. if the vent is plugged it could cause a leak. also if the drain plug was over tightened it could have cracked the cover and cause a slow leak. seen that one happen before
yap is offline   Reply With Quote
Old 06-23-2014, 06:06 PM   #4
Zefy
Scooby Specialist
 
Member#: 105104
Join Date: Jan 2006
Chapter/Region: VIC
Location: Coquitlam, BC, Canada
Vehicle:
1979 BRAT / 01 RSTI
99 2.5TS (DEAD) / 87 GL

Default

a diff is pretty well impossible to overfill. However when you drain it, the oil does spill onto the case. Because the oil wasn't changed very long ago, I would wipe down the case nice and clean (checking for any obvious cracks or something) and monitor it over a decent amount of time. It may be that the oil from draining has coated the case and now it has gotten dirty making it really obvious.

If it is cracked, talk to hpl. I'm sure they stand behind their work repair it.

If it is the gasket, then i would say that it is a warranty item and subaru would cover it. Pretty sure you're still in the powertrain warranty period...?
Zefy is offline   Reply With Quote
Old 06-23-2014, 06:11 PM   #5
DampedSubaru
Scooby Newbie
 
Member#: 381937
Join Date: Feb 2014
Default

I think what you're seeing is the residue of the oil that was drained. Like suggested above, clean your differential. After a couple days look at it and see if it's still leaking.

When I changed my Differential fluid I used a bit of liquid gasket on the threads of the drain plug to make sure it's sealed good. Maybe they skipped that part/also didn't torque it enough.
DampedSubaru is offline   Reply With Quote
Old 06-25-2014, 09:13 PM   #6
deadhero15
Scooby Newbie
 
Member#: 385146
Join Date: Mar 2014
Default

Hi guys thnx for the reply. I went to shop who did the oil diff change. They cleaned around it. But then after a day of driving i can see oil creeping down again and its really coming from the vent. And i have a major power train warranty until 2016. And i have service sched this friday at subaru dealer. I can see some drips at my parking lot. I assuming the vent breather is broken or something. I dont see it any cracks or from the gasket. If it was ill be seeing alot more oil leaks. Ill update u guys on friday. I hope they will warranty it.
deadhero15 is offline   Reply With Quote
Old 06-25-2014, 09:15 PM   #7
deadhero15
Scooby Newbie
 
Member#: 385146
Join Date: Mar 2014
Default

Btw my oil level on the diff is pretty level on the filler hole. The shop said.
deadhero15 is offline   Reply With Quote
Old 06-26-2014, 01:35 AM   #8
trillcertified
Scooby Newbie
 
Member#: 378403
Join Date: Jan 2014
Chapter/Region: VIC
Location: North Vancouver
Vehicle:
2004 wrx

Default

Definetely sounds like they over filled it a bit at the shop. Nothing to worry about. Im a mechanic for Ford and honestly about 60% of escapes come from the factory with to much rear diff fluid in them.
trillcertified is offline   Reply With Quote
Old 06-26-2014, 03:55 AM   #9
5 Zigen
Scooby Guru
 
Member#: 769
Join Date: Jan 2000
Chapter/Region: VIC
Location: Burnaby, BC, Canada
Vehicle:
04 SoBaLo EsTea-ai
ZERO/SPORTS/99 GM6/05 BP6

Default

Quote:
Originally Posted by trillcertified View Post
Definetely sounds like they over filled it a bit at the shop. Nothing to worry about. Im a mechanic for Ford and honestly about 60% of escapes come from the factory with to much rear diff fluid in them.
we have taken out the filler plug (in this case, the rear differential temp sensor) to check the level when he brought it back for his concern, there is no point to just clean it even tho he didn't make any appointment. There was only a tiny little bit is coming out just like normal.

I would assume, when you said "they over filled it a bit", is at least .3L on top of the standard 1L to 1.1L capacity on the STi; If it does, it should be leaking since 53k but not until very recently (owner claims that it was dry when he installed / adjusted his coilovers a week ago, then after some hard driving during the week he noticed oil leak ~ I do track my STi so I know it's not normal.

Eric from HBL Autosports.

ps: he came in when shop was very busy, so we were only checking it on the level ground outside the shop. He is supposed to bring it back on Thur for inspection (which is today) but I guess if he wants to try warranty now (as far as I know major powertrain only covers if differential breaks, but not when it leaks; who knows, maybe he gets a very nice mechanic + service advisor to do all the paper work

Last edited by 5 Zigen; 06-26-2014 at 12:01 PM.
5 Zigen is offline   Reply With Quote
Old 06-26-2014, 05:02 PM   #10
alcoolaid
Scooby Guru
 
Member#: 134949
Join Date: Dec 2006
Chapter/Region: VIC
Location: Vancouver, BC
Vehicle:
'07 SWP STi
Instagram | arthurlam89

Default

Can happen if you drive car hard and the rear diff fluid is too thin. Basically mists out at higher speeds (160kph+)

Mine leaked out a lot from the vent tube when I was using motylgear. Switched to extra-s and it's not as bad but still leaks
alcoolaid is offline   Reply With Quote
Old 06-27-2014, 04:20 AM   #11
5 Zigen
Scooby Guru
 
Member#: 769
Join Date: Jan 2000
Chapter/Region: VIC
Location: Burnaby, BC, Canada
Vehicle:
04 SoBaLo EsTea-ai
ZERO/SPORTS/99 GM6/05 BP6

Default

Have you tried thicker fluid Arthur? For the power you are putting down, everything might be a little bit different :P
5 Zigen is offline   Reply With Quote
Old 06-27-2014, 07:49 AM   #12
deadhero15
Scooby Newbie
 
Member#: 385146
Join Date: Mar 2014
Default

thanks to ERic from HBL autosport tried helping me out. anyways today is my appointment in Subaru dealership @ 1pm. lets see how it goes.
deadhero15 is offline   Reply With Quote
Old 06-28-2014, 06:10 PM   #13
deadhero15
Scooby Newbie
 
Member#: 385146
Join Date: Mar 2014
Default

Replacing faulty vent breather $3
deadhero15 is offline   Reply With Quote
Old 06-30-2014, 07:23 AM   #14
ALBfee
Scooby Newbie
 
Member#: 385779
Join Date: Mar 2014
Chapter/Region: VIC
Vehicle:
2012 WRX STI
silver

Default

$3? fixed?
ALBfee 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 01:44 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.