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Old 02-20-2011, 12:42 PM   #1
ant00h
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Default burnt oil smell through air vents?

I have an 02 wrx when the car is sitting and idleing i get a burnt oil smell coming through the vents. other then idleing i can't smell it. Wondering if anyone has any suggestions? i know its not leaking out of the oil filter, i checked that.
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Old 02-20-2011, 12:44 PM   #2
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Cam seals could be leaking on the header . Common leak
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Old 02-20-2011, 01:46 PM   #3
XanRules
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Or valve covers.
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Old 02-20-2011, 04:45 PM   #4
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mine was the right valve cover and seperator valve gasket.
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Old 02-20-2011, 06:59 PM   #5
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Maybe the front or rear main seal? I love Subarus but the sure are leaky SOBs.
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Old 02-21-2011, 10:01 AM   #6
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Quote:
Originally Posted by davhul View Post
mine was the right valve cover and seperator valve gasket.
A lot of people don't know about the oil/air separator gaskets. I bumped into a couple of subaru experts (mechanics actually) who needed to be told to check out an engine diagram to locate them.
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Old 02-21-2011, 10:09 AM   #7
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Quote:
Originally Posted by z&cobb View Post
A lot of people don't know about the oil/air separator gaskets. I bumped into a couple of subaru experts (mechanics actually) who needed to be told to check out an engine diagram to locate them.
Are those the ones with the 4 10mm (I think) bolts on them that are in the way when removing the GBOD for an injector install? One one either side of the engine that feed through to the black hard lines in front of the intercooler?I had them both off during my injector install and cleaned the gunk out, but didn't replace the gaskets ( ..yeah..I know). I've cleaned out the PCV valve as well.I periodically get this same smell. I have no oil leaks what-so-ever. Engine is clean, sides, front back, top and bottom.I was thinking it could be a bit of grease seeping from the front CV axles and being flung onto the DP, but there really isn't any residue of burnt grease on the DP.
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Old 02-21-2011, 10:21 AM   #8
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question.

did you install a down pipe recently? When I installed mine, it was somewhat close to the AC drip and was causing the hose to burn a little. It produced an unpleasant smell through the vents until I moved it.
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Old 02-21-2011, 11:57 AM   #9
Brock31
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Mine is secured away from the DP. The DP has been on for several years, but this does happen fairly frequently
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Old 02-21-2011, 10:19 PM   #10
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definitely check the passenger side valve cover - when it leaks, it drips onto the up-pipe...
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Old 02-21-2011, 11:35 PM   #11
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Quote:
Originally Posted by Brock31 View Post
Are those the ones with the 4 10mm (I think) bolts on them that are in the way when removing the GBOD for an injector install? One one either side of the engine that feed through to the black hard lines in front of the intercooler?I had them both off during my injector install and cleaned the gunk out, but didn't replace the gaskets ( ..yeah..I know). I've cleaned out the PCV valve as well.I periodically get this same smell. I have no oil leaks what-so-ever. Engine is clean, sides, front back, top and bottom.I was thinking it could be a bit of grease seeping from the front CV axles and being flung onto the DP, but there really isn't any residue of burnt grease on the DP.
I remember 3 bolts holding a thin stamped metal cover down. Its near the lower radiator hose and above a heat shield. It is also close to the oil pump pressure relief valve, which has nothing to with this except interfere with easy access as does the hose and the bottom of the radiator.

The gaskets are the same part number for the right front and the left rear. The part number is 11832AA031. Cost me about 12 bucks for two. Check where they are on an engine diagram. Like on Subaruparts.com. There are other covers as well which is what the two Mechanics were focused on. The ones I am writing about are not those covers.

I have also had a right side inner cv boot tear a little, that will cause smoke too, but its a different grease like odor. On my wrx it hit the 4 tapering to 3 inch TXS downpipe.
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Old 02-21-2011, 11:49 PM   #12
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Any other downside to not fixing something like this or just discomfort?
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Old 02-22-2011, 12:29 AM   #13
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Quote:
Originally Posted by Fighter4Hire
Any other downside to not fixing something like this or just discomfort?
Oil starvation, low compression, etc
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Old 02-26-2011, 08:18 AM   #14
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I checked it out the other day and found pass. valve cover leak, it was drippin on U pipe. Thanks for the input. now the task comes changing it. Do u half to jack that side of the motor up or will it clear?
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Old 02-26-2011, 09:20 AM   #15
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Before going to the trouble of replacing the valve cover gasket, get in there with a 10mm wrench or ratchet and try tightening the bolts holding the cover down. You may find they are loose, especially the lower ones. That was the case for me, snugging up all the bolts and cleaning up the oil residue put a stop to the minor leak and occasional smell when it dripped on the exhaust. Been over a year and still good.
The additional heat and thermal cycling from the turbo in that area over time tends to make the bolts loosen. Of course the same conditions will also cause the gaskets to dry out and fail, so if bolt tightening doesn't fix the drip then it will be time for a gasket repair.
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