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Old 08-10-2004, 06:02 PM   #1
Brian204
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Default Most common oil leak?

My EA82 leaks/burns maybe a quart every 2-3 weeks. The underside of my engine is kind of smeared with oil enough that I can't quite tell exactly where it's coming from. Is it more likely the valve cover gaskets, or dreadedly the head gaskets? It's not a turbo, and hasn't really been abused, either. Has 210k miles.
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Old 08-10-2004, 09:49 PM   #2
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Brian204 The list is big first cam case orings, then the cam case threebond then the valve covers the cam seals the oil pump kermit the frog gasket the front oil pump seal ( when that leaks it leaks air and causes valve taps ) the pan gasket the seperator plate gasket ,head gasket, You name it it leaks on that engine. Start by resealing the cam cases, thats probably the big leak.
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Old 08-11-2004, 06:22 PM   #3
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Yes cam seals are one of the 1st to go. Maybee try using some gunk cleaner to clean down there, then you would be able to locate the leak better
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Old 08-12-2004, 02:18 AM   #4
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an 86 I am about to take delivery of has a leaking problem. Turns out the oil seals in the head gaskets (there is an integrated o ring) is dried up. Loses like a quart every 200-300 miles. Solution in my case. Replace the head gaskets.

Total list of things that leak on these cars:

Head gasket O-rings
Cam case O-rings
Valve cover gaskets
PCV hoses (if cracked)
Oil pan gasket
rear main seal
front main seal
cam seals
oil pump seal
oil pump mickey mouse gasket (thats what it called, you will understand if you see it)
and drain plug (when you see one with no crush washer and only finger tight... they leak...)

Most common leaks are the valve covers and oil pan from my experiences. But generally these engines are greasy everywhere.
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Old 08-12-2004, 12:41 PM   #5
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My XT was leaking a half quart every week, until I replaced the cam seals. Now it doesn't leak a DROP!
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Old 08-12-2004, 10:15 PM   #6
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Upon closer inspection, it appears to be worst from the cam case, as you guys predicted. Now, am i correct that there is a fluid bond between it and the head? Is there also a gasket seal? Has anyone re-bonded the cam case before?
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Old 08-13-2004, 12:05 PM   #7
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oil will collect and drip off the lowest part where tha cam tower meets the head, and a leaky valve cover may appear to be a leking cam tower. i am debating that one on my own ride myself. i myself will fix the cam cover gasket and if that wont fix it then i will consider the cam tower o- ring

you can do the work with the motor in the car, but i recommend pulling the motor our for better access, and might as well do other engine seals as well

you will want to use permatex ULTRA GREY or any other anaerobic sealer "for import engines" there is also an 0-ring on the cam tower as well, replace that

http://www.warpthree.com/milesfox/su...ce/service.htm
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Old 08-14-2004, 01:34 AM   #8
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I agree with Fox, use the grey permatex. When you replace the O ring in the cam tower use a genuine subaru one... they are very well re-inforced. I think better than the original factory one even.

Just try to scrape all the old permatex outta the groove as best you can and clean all the surfaces before putting the fresh stuff on. It will take a while, but is still faster than chipping off cork chunks from the oil pan gasket
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Old 08-23-2004, 10:04 AM   #9
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Quote:
Originally Posted by Brian204
Upon closer inspection, it appears to be worst from the cam case, as you guys predicted. Now, am i correct that there is a fluid bond between it and the head? Is there also a gasket seal? Has anyone re-bonded the cam case before?
G'Day,
I have spent ALOT of years on these, building everything from 'Maude's supermarket runabout', to a Fully Worked 12.5 sec Racer.
If you want to do the Cam Cases/Housings ONCE ONLY. Buy some 1.6mm O ring in lengths, cut it to correct length by laying in the 'Groove' on the housings after THree-Bond removal with stiff wire brish, (not wire-wheel on grinder!), join with 'Superglue'at the top, Use only GENUINE Oil Gallery O Rings, (they are steel backed). Assemble with a MINIMUM if threebond, (Especially around the Oil galleries at the bottom), then Bolt up as normal.
If it leaks when you do this properly, I would be very interested to know,
I have recently serviced one I have done over 250,000kms Ago!!!

Cheers,

Sixpack Subaru
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Old 03-25-2008, 09:36 PM   #10
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I have a 2.5 4 cammer with a 5 speed manual. I have a leak where the engine and trans meet. What do you gys think is the most likley culprit rear main, trans input seal or that oil seperator thing?
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Old 03-26-2008, 01:54 AM   #11
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wow old post. well since i am here might as well update my link(old domain)

http://www.economysuperstar.com/mile...aru/subaru.htm

i am not at all familiar with 2.5, but i can tell you that rear main seals rarely if never at all fail. ther eis an oil separator chember on the back of the motor that is part of the pcv system. its just a plate the bolts onto the back of the engine block behind the flywheel. i guess the o.e. ones are plastic and crack or distort, and a metal replacement one is available as a fix.

like i said i have no experience with 2.5, but with my experience in subars all around i would bet this is your problem
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Old 03-26-2008, 02:20 AM   #12
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Quote:
Originally Posted by jimsaco View Post
I have a 2.5 4 cammer with a 5 speed manual. I have a leak where the engine and trans meet. What do you gys think is the most likley culprit rear main, trans input seal or that oil seperator thing?
You need a new engine

What would any one here in the "Old Gen" forum know about a New Gen 2.5?
I think you posted this in the wrong forum


Btw, you wont know until you seperate the tranny from the engine.
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Old 03-27-2008, 06:21 PM   #13
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thanks, sorry I hadn't in my haste to post I didn't see the old school thing. I was leaning towards the oil separator but I hate to pull it apart to see. I am glad to hear that the rear seals are pretty tough. Thanks again!
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Old 03-29-2008, 01:05 AM   #14
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I just bought an 88 with 170k for $350 because it was leaking a lot of oil and the guy didn’t want to pay to get it fixed. When I got under it I could see the oil filter dripping, it was hardly on. With that tight it still leeks a very small amount out of the cam housing. Other than that the car is perfect.
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Old 03-29-2008, 02:37 AM   #15
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I just did a small reseal on my '87 and here's what I did since I had the motor out...
oil pan gasket
valve cover gaskets WITH grommets
front and rear main seals

then I also did the following
lower radiator hose (had a small pinhole in it)
timing belts with tensioners and idler
clutch
PCV valve

Now my car is much happier and I don't lose any oil. Also noticed the pressure line on the power steering pump was loose as well so I tightened it up while I was at it.
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Old 04-12-2008, 01:46 PM   #16
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Hello. First post here. Please excuse any mistakes in protocol - if committed, they were unintentional.

I've been told my 99 Outback needs the camshaft cover gaskets replaced. They tell me there are 4 cams on this version 2.5 engine, and it'll cost about $1,500 to $1,800. This seemes like a lot to me.

Does this price sound correct to you?
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Old 04-13-2008, 01:14 AM   #17
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Quote:
Originally Posted by thruhike98 View Post
Hello. First post here. Please excuse any mistakes in protocol - if committed, they were unintentional.

I've been told my 99 Outback needs the camshaft cover gaskets replaced. They tell me there are 4 cams on this version 2.5 engine, and it'll cost about $1,500 to $1,800. This seemes like a lot to me.

Does this price sound correct to you?
er, ive never heard the term "camshaft cover", but i would definitely get a second opinion. who gave you that quote?
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Old 04-14-2008, 10:55 AM   #18
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Thanks for the reply nkx. I may have used the wrong term. Maybe "cam seals" (four of them on a DOHC engine)?
It was an independent service station. I got some quotes from dealers and called them back this am. It's going to be about 1/3 of that price, around $600. They said the amount of oil that had leaked all over the engine made it difficult for him to tell whether there were additional leaks, and he was quoting with that being a possibility. Hummm...
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Old 04-14-2008, 01:21 PM   #19
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Its possible there could be more leaks. Normally when replacing any seal on the front of our engines, its a good idea to do a complete reseal on the front. Cam seals
Crank seal
Water pump
Oil pump seal ( if this engine has them)
Timing belt change
Might even consider if you have high mileage, changing the valve cover gaskets and oil pan gasket.
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Old 04-14-2008, 01:56 PM   #20
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Turbone4x4: This is good to know. They will replace the cam seals and timing belt with this job. I had the water pump, timing belt, and valve cover gasket done last Fall. So I will have at least the majority of these covered. Thanks for the list!
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Old 04-15-2008, 02:52 AM   #21
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"camshaft cover" would be referencing the "valve covers"

if you had the timing belts done this would assume the front cam seals(the selas behind the pulleys) have been done. but if the "valve covers" are leaking they can make a mess, and probably werent changed last time around.

its called a cam cover because the cams sit over the valves and rockers, in a 'tower' mounted above the head, and ov course when you take off this cover you see the cams instead of rockers and valves like in typical pushrod engines.

its just modern terminology with the design of motors these days
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Old 04-21-2008, 10:56 AM   #22
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My most common oil leak has been the valve cover gaskets. When I bought the car, I had to replace one. Now the other side has gone.
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Old 01-06-2009, 10:29 PM   #23
eppoh
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Quote:
Originally Posted by Flowmastered87GL View Post
an 86 I am about to take delivery of has a leaking problem. Turns out the oil seals in the head gaskets (there is an integrated o ring) is dried up. Loses like a quart every 200-300 miles. Solution in my case. Replace the head gaskets.

Total list of things that leak on these cars:

Head gasket O-rings
Cam case O-rings
Valve cover gaskets
PCV hoses (if cracked)
Oil pan gasket
rear main seal
front main seal
cam seals
oil pump seal
oil pump mickey mouse gasket (thats what it called, you will understand if you see it)
and drain plug (when you see one with no crush washer and only finger tight... they leak...)

Most common leaks are the valve covers and oil pan from my experiences. But generally these engines are greasy everywhere.
Where are these head gasket O rings located. I have a major oil leak from the lower corner of a head at the gasket. Good compression, no coolant leak.

New on this list. Thanks, oh, it is a 93 Loyale, EA82
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Old 01-07-2009, 07:33 PM   #24
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Uhhh been a while.... I THINK the head gasket o-ring is just like a little neoprene or rubber o-ring thats integrated into the actual head gasket.
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Old 06-05-2011, 04:42 PM   #25
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The cylinder head to block o-ring are usually just part of the head gasket themselves, kind of stamped into place. They can be a weak spot, as in the exhaust blowing into coolant leaks from the EJ25 phase I's. As far as Subaru oil leak common causes, they are usually the cam seals, oil pump crank seal, valve cover gaskets, and sometimes even the engine oil pressure switch can leak.
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