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Old 01-22-2009, 09:44 PM   #1
zcivic
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Default Oil Leak around filter 02 WRX

I am loosing oil and I do have oil on the filter itself. Is there anything I may want to check other then the oil cooler o-ring. Looked at some parts diagrams and I dont see anything just wanted to make sure nothing is open or possibly open above that area.
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Old 01-22-2009, 09:50 PM   #2
Newbuggy
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My best guess would be the oil filter gasket. Maybe the last filter left an O-ring. or the new filters o-ring got torn when you put it on. Did you oil up the new o-ring before you installed it?
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Old 01-22-2009, 09:57 PM   #3
claycron
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Im willing to bet the old gasket wasnt removed and you have two in there, almost happened to me last oil change
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Old 01-22-2009, 10:57 PM   #4
piecemealBHC
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Quote:
Originally Posted by claycron View Post
Im willing to bet the old gasket wasnt removed and you have two in there, almost happened to me last oil change
+1... if you still have the old filter, check to see if the rubber gasket came off with it, if not you might be able to tell by looking at the base area of the new one you installed.

Have you tried wiping the oil off of the new filter and around the base where it meets the block to see if more builds up? It is possible your problem could be elsewhere, and there was just some residual oil that found it's way onto the filter... but doing this could help rule that out.
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Old 01-23-2009, 12:46 AM   #5
Sean2.5Black
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Also, when you're putting the new filter on, dip your finger in the oil and wipe it around the gasket of your new filter... It helps seal... a lot
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Old 01-23-2009, 05:30 PM   #6
zcivic
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Well I know its coming from above the filter. I cleaned the oil cooler where the filter goes with a towel. I also oil the gasket on the new filter. I cleaned the filter case the other day and checked it again and new oil on it. Area around the oil pan is clean all the new wet oil is on the filter itself.
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Old 01-23-2009, 05:32 PM   #7
sledge_hammer
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Im going to say you didnt use a crush washer, or you got the wrong crush washer.
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Old 01-23-2009, 06:52 PM   #8
stiluv2xl8
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Crush washer on an oil filter? Kewl
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Old 01-29-2009, 04:21 PM   #9
zcivic
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Quote:
Originally Posted by stiluv2xl8 View Post
Crush washer on an oil filter? Kewl
Thats what I was thinking. Oh well next week we will find out. Have to change t-belt and waterpump and while its apart will replace that o-ring for s&g's
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Old 01-29-2009, 07:07 PM   #10
piecemealBHC
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Originally Posted by sledge_hammer View Post
Im going to say you didnt use a crush washer, or you got the wrong crush washer.
1st... I hope you're joking about a crush washer on the filter. If you're not; there is no crush washer on the filter nor should there be. But overfilling your headlight fluid could cause this issue.

2nd... The crush washer that you're talking about is on the drain plug. Unless the OP is doing backflips with his car, he's not getting oil on his filter because of the crush washer.
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Old 01-29-2009, 08:16 PM   #11
94'325is
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Just a shot in the dark but do you have an oil pressure gauge? If you're using a sandwich adapter those are known for leaking...
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Old 01-29-2009, 08:20 PM   #12
rollingindiana
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What kind of oil filter do you have?
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Old 01-29-2009, 09:04 PM   #13
msedly
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I used to think that mine was leaking too. It turned out that while screwing the new filter on, a little oil that was still dripping out would sit on the top of the filter and run down it after I drove it around for a little while.
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Old 01-30-2009, 01:22 AM   #14
RonJitsu
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Overtightened filter?
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Old 02-13-2012, 05:07 PM   #15
donaldsmrs
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my 02 wrx has the same problem. and it was like that when i bought it and i just changed the oil and checked it and still had oil leaking on the filter. then i cleaned it thinking maybe it was like you said, just spilled over when i tightened the filter but its still coming back. did you fix your leak?
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Old 02-13-2012, 08:29 PM   #16
AJW Performance
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We have seen this a number of times. It normally turns out to be the oil cooler ring. it only adds 10 extra mins during an oil change to swap it out.
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Old 02-23-2012, 11:41 AM   #17
passion4JC
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Quote:
Originally Posted by AJW Performance View Post
We have seen this a number of times. It normally turns out to be the oil cooler ring. it only adds 10 extra mins during an oil change to swap it out.
Which part is it that you are referring to?

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Old 04-06-2012, 02:06 PM   #18
Daddy_Digital
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im having the same problem. what a cliff hanger. tells what it is, but doesnt come back to tell ya where it is located. smh..
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Old 04-06-2012, 02:13 PM   #19
ever
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It the o-ring part #21370 I had the same issue with my 02 Wrx.
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Old 11-26-2012, 10:10 PM   #20
boss302beav
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I have the same issue of having to replace the engine oil cooler o-ring.

If it helps I have found out the following to hopefully save folks time and money.

The socket you will need to remove the oil connector ( the threaded shaft the oil filter screws onto) needs to be a long socket, and 24MM metric in size in order to unscrew it and safely remove it.

Once you finish the job and are putting everything back together - the torque on the oil connector shaft is 39.8 Ft-Lbs.( on a 2002 WRX Turbo 2.0L) ( *** Important note - in order to torque and not risk over doing it - you will need to clean the connector shaft and all the threads it goes into very good with a rag, and maybe little break cleaner, so that little to no oil is present. If the oil is on the threads you will have to bring down the torque a bit to compensate for the reduced friction on the connector due to the oil.

I hope this helps as this was a pesky problem for me as it made the driving cabin wreak of oil and I had to drive with windows down constantly to not get sick from the smell. Glad its a fairly easy fix.
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Old 02-22-2013, 10:59 PM   #21
04wagon@stg2
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haha i guess this guy still has the leak happening...no result?

noticed the oil residue on the oil cooler and some on the filter on my last oil change..cleaned it up, put the new oil filter on, no problems.. i check my oil every few 100 miles, noticed the one time it was back again on the cooler a bit and some streaks down the side of the filter... so safe to safe im picking up the oil cooler o-ring (part# 21370KA001) tomorrow and changing it out when doing my oil change.

i wanted to also do the crossover water/intercooler pipe with hoses that connect to the block and oil cooler, and sits just above the exhaust crossover pipe (what a screwey place to put that with all the heat dispersing from the exhaust manifold, heat shield on it or not) .. but i contacted my local subaru dealership a lil late and would of have to be ordered... just my luck they wouldnt have that in stock.

UPDATE: all better

Last edited by 04wagon@stg2; 02-23-2013 at 09:20 PM.
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Old 04-29-2013, 01:09 PM   #22
mikesh_21
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Default '04 wrx wagon - filter leak

Hey everyone,

I have been a member for a while but mostly just browsing and no posting. I have a 2004 Subaru Impreza WRX Wagon and I had the same filter leak. I am very thankful for the replies in this thread because it gave me the fix I was looking for. I am waiting on my brother-in-law's torque wrench to finish tightening everything back up but then I will put it back together and see how she does.

I will update shortly.

Thanks again!

p.s. note to those doing this, unless someone knows another way to do it, like use hose clamps or something, you end up draining all your coolant getting to this o-ring. Good hindsight for getting 2 jobs done at once, filter o-ring and fluid flush.

p.p.s. Just finished the o-ring swap. Quite a PITA to get it done with the radiator and everything installed and in the way but it worked beautifully. Just a few days ago I saw an oil bead accumulate on the bottom of the filter after only a few minutes of idling. This time, nothing! I am about to put some serious miles on her so we shall see how the o-ring swap, and new radiator hold up. I have high hopes.

Last edited by mikesh_21; 04-29-2013 at 04:41 PM.
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Old 05-04-2013, 01:56 AM   #23
BugeyedBandit
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I'm having this exact same issue, and two new oil cooler housing gaskets later, it's still not fixed. Is there a possibility that my oil cooler housing is warped? My mechanic insisted on tightening the 24mm bolt (the one that holds the housing on) till the whole car rocked on the lift
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Old 05-04-2013, 12:08 PM   #24
Daddy_Digital
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Some tips:
*Make sure you have a 24mm long socket so it can remove the nut that holds the oil cooler to the engine block
*If the hoses on the oil cooler aren't leaking, dont take them off. You are just making more work for yourself. Keep it simple.
*If you decide/need to replace the hoses for the oil cooler, taking the header off helps because it gives you more room to work with.
*Buy a spare gasket just in case you accidentally break the first one you put on. Saves you from a pain in the butt later. If you dont use the spare one, you can save it for later or get your money back.
*Use Subaru radiator coolant. IT cost a little more but its better for your Subaru. Doesn't eat away the hoses and seals as much. (at least that is what my mechanic told me)

These tips I wish I had before i did this a couple months back. Despite trail and error, I completed the task and no more oil leak.
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Old 05-04-2013, 12:34 PM   #25
DZXN
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Do you know the leak is coming from above the cooler? Is it the same mechanic who does your oil changes? Probably your gorilla mechanic over tightening your oil filter.
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