Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

Rear Seal Leak?


  • Please log in to reply
5 replies to this topic

#1 Aubrey

Aubrey

    New User

  • Members
  • PipPip
  • 13 posts
  • BC

Posted 17 September 2004 - 03:51 PM

Hi,

My 91 Legacy Turbo has sprung a nasty little oil leak of late. Somewhere oil is leaking from the engine, either underneath or near the firewall as far as I can tell, and hits something hot and burns up. This produces a horrible petrolum smell when I'm idling at a stop since the smoke gets sucked right into the HVAC intake. I haven't had a chance to crawl around down there and get a better look yet. At my last oil change the report mentioned a "possible rear seal leak". Could this be my problem? Where is the rear seal? And how much am I looking at in parts and especially labour to get it changed?

Thanks for you help!

#2 Adnan

Adnan

    USMB Regular

  • Members
  • PipPipPip
  • 117 posts
  • Fremont

Posted 17 September 2004 - 07:13 PM

Hi,

This does sound like a real main seal problem. The rear main seal is an oil seal, much like the ones on the front of the engine (crank and cams) that seals the exit point of the crankshaft from the back of the engine. Just as the front seals fail, rears can too.

Unlike the front seals, however, replacing the rear seal requires that the transmission be removed from the engine. If you think about the way the parts are connected, the driveline has to be separated to get the thing out.

You don't mention whether the car is a manual or an automatic but my philosophy is to always replace the rear main anytime I need to drop the gearbox, such as for a clutch replacement. If you do have a manual transmission, you might opt to hang in there till you need a new clutch. That's a personal decision as the leak is not likely to damage anything (except your olfactory glands).

As for cost, think of it as the cost of labor for a clutch replacement as the main seal itself costs almost nothing. Your spelling of "labour" suggests that you are outside the US somewhere, so I can't even begin to speculate on the costs.

Regards,
Adnan

#3 Aubrey

Aubrey

    New User

  • Members
  • PipPip
  • 13 posts
  • BC

Posted 18 September 2004 - 12:14 AM

Thanks, very observant with the spelling :) I'm Canadian.
It's an auto tranny, so I won't be waiting for a clutch replacement.
I have a feeling this is going to cost me :(
I'm almost due for a tranny fluid change though so at least I can get both done at once, if that's any savings at all...


Hi,

This does sound like a real main seal problem. The rear main seal is an oil seal, much like the ones on the front of the engine (crank and cams) that seals the exit point of the crankshaft from the back of the engine. Just as the front seals fail, rears can too.

Unlike the front seals, however, replacing the rear seal requires that the transmission be removed from the engine. If you think about the way the parts are connected, the driveline has to be separated to get the thing out.

You don't mention whether the car is a manual or an automatic but my philosophy is to always replace the rear main anytime I need to drop the gearbox, such as for a clutch replacement. If you do have a manual transmission, you might opt to hang in there till you need a new clutch. That's a personal decision as the leak is not likely to damage anything (except your olfactory glands).

As for cost, think of it as the cost of labor for a clutch replacement as the main seal itself costs almost nothing. Your spelling of "labour" suggests that you are outside the US somewhere, so I can't even begin to speculate on the costs.

Regards,
Adnan



#4 cookie

cookie

    Elite Master of the Subaru

  • Members
  • 3,058 posts
  • SFO

Posted 18 September 2004 - 02:49 PM

if that is the proper term on a Subaru.A lot of them are plastic and prone to leak. I had mine changed when I had the clutch and rear seal done. It is very easy and cheap when the engine is out and the plastic ones have a high failure rate. The new one is metal.

#5 boilerman

boilerman

    New User

  • Members
  • PipPip
  • 10 posts
  • Auckland

Posted 19 September 2004 - 05:01 PM

Before yoy have the gearbox removed to do the seal.......clean the suspect area well......go for a test drive to warm everything up.....get underneath the vehicle with eng running...have a good look around immediatly below the turbo..Sometimes the oil leak is from the oil line that goes to the top of the turbo from the rear of the right head....if so the oil drps onto the exhaust up pipe..giving smoke and smells etc....good luck

#6 tcspeer

tcspeer

    1000+ Super USER!

  • Members
  • 1,444 posts
  • Walnut Springs

Posted 19 September 2004 - 08:18 PM

I had a rear engine seal go out on my Subaru at around 100,000 miles. I put some of the Gold Eagle stop leak in it and it stopped. It was still not leaking at 288,000 miles when my idle pully came apart and the valves got into pistons. Many people here dont like to use these products, but I dont know of one person that has ever had a problem from using them. You can go to their web site for more details on their products.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users