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Old 08-13-2005, 03:08 PM   #1
BoardRider
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Member#: 32059
Join Date: Jan 2003
Location: Huntington Beach, CA
Vehicle:
1997 Legacy GT sedan
CBR600, WR400, Z50R

Unhappy Oil Leak...! (97 Legacy GT) - See picture...

My Legacy GT has 114k miles and I have never had an oil leak or a head gasket problem (yet???!). Just this week I noticed a little spot of oil where I park my car in the driveway, so I looked under the car today. This is what I saw:



If you can't see the image, try THIS LINK. (I always have problems with adding images to my posts!)

I read a lot about head gasket problems on here last year and have forgotten a lot of it, so I'm going to start doing some research now, but in the meanwhile, will someone who has experience with this oil leak please advise?!

I just bought supplies so I could change my oil today too, but I may hold off if I will need to have work done that will merit draining my oil anyway...

Thanks!!!
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Last edited by BoardRider; 08-14-2005 at 07:54 PM.
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Old 08-13-2005, 03:14 PM   #2
Dobes
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Join Date: Aug 1999
Location: Philly suburbs
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1997 Legacy GT-T

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Looks like a front main crank seal. Plan on doing a timing belt too since the existing one may be coated with oil. And maybe a water pump too while the front is apart.

IIRC, when I had my front main replaced on my RS (same motor) it was about $250.

JD
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Old 08-13-2005, 03:45 PM   #3
BoardRider
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1997 Legacy GT sedan
CBR600, WR400, Z50R

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Quote:
Originally Posted by Dobes
...Plan on doing a timing belt too since the existing one may be coated with oil....
I had the timing belt replaced at 85k miles when I bought the car. And I don't think there's any oil on the belt, but it may be a good idea to get it changed if they have to go in there anyway. I'm not sure what gets taken apart...
I'm going to have to take it to a mechanic since I don't know much about this area and don't have many tools...

Last edited by BoardRider; 08-13-2005 at 04:14 PM.
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Old 08-13-2005, 08:45 PM   #4
Subietonic
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Location: Low Country, SC
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Four Count 'em
GF5,BDA,BD5, BP5

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I've never known a Subaru front main crank seal to leak unless the engine was run without oil and then refilled, even then very little leak. Lot's of rear main leaks due to the rear cover plate, but not the front main.

I'd bet that it's the "O' ring/plate seal on the oil pump. It's about the right mileage and age so that's what I'd check out. Will need to pull the front and rear timing belt covers, pull the timing belt off and do some investigating. But, that's where I'd start. Might as well replace the water pump while you've got it pulled down unless you did that when you changed out your timing belt at 100K

OTOH - it could be a cam seal starting to leak too...but, again, you've got to pull the TB covers to see. My money is on it being an oil pump leak.

Dale
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Old 08-14-2005, 11:31 PM   #5
subysouth
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Grey 5-speed

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Quote:
Originally Posted by Subietonic
I've never known a Subaru front main crank seal to leak unless the engine was run without oil and then refilled, even then very little leak. Lot's of rear main leaks due to the rear cover plate, but not the front main.

I'd bet that it's the "O' ring/plate seal on the oil pump. It's about the right mileage and age so that's what I'd check out. Will need to pull the front and rear timing belt covers, pull the timing belt off and do some investigating. But, that's where I'd start. Might as well replace the water pump while you've got it pulled down unless you did that when you changed out your timing belt at 100K

OTOH - it could be a cam seal starting to leak too...but, again, you've got to pull the TB covers to see. My money is on it being an oil pump leak.

Dale

Dale, I seldom disagree with anything you say, but I have yet to have Legacy that didnt have a leaking front main seal. I replaced the one on the BF twice and the BG once. Subaru actually redesigned the seals because the old design failed a LOT. The older seals are black and the newer ones brown. Havent had a brown one leak yet but I havent put a ton of miles on them yet either.

I agree do the belt(if anywhere near time), oil pump o-ring, bolt re-tighten and re-seat(clean the port of any slag if it hasnt been done,) and the cam seals too. The cam seals seem to last a little longer than the front main seal in my experience.

ss

Last edited by subysouth; 08-15-2005 at 02:50 AM.
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Old 08-15-2005, 12:55 AM   #6
Subietonic
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Four Count 'em
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SS - I defer to your experience then - in 31 years of Subes, I've never had any problems with the front main seal. Have had a block halve separation issue once that caused a leak in the vicinity of the front main, but fortunately never the main itself. Knock on aluminum...

Dale
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Old 08-15-2005, 02:49 AM   #7
subysouth
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2007 Outback XT
Grey 5-speed

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Quote:
Originally Posted by Subietonic
SS - I defer to your experience then - in 31 years of Subes, I've never had any problems with the front main seal. Have had a block halve separation issue once that caused a leak in the vicinity of the front main, but fortunately never the main itself. Knock on aluminum...

Dale
I'll defer next time.

Just saw you have a BP GT 5-speed(sweet) and are a mod over on LegGT, congrats. I've got the Bilstein GT setup for the BP, just gotta source the car now.

ss
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