brycarp Posted May 8, 2018 Share Posted May 8, 2018 (edited) Hi All, I'm getting into my son's 2002 Legacy GT with ordinary SOHC EJ25. It's been going through oil too quickly and the bottom of the oil pump is always wet so I'm in there to make sure the oil pump is sealed to the block properly, replace the pressure o-ring, and replace the front main seal to be sure. But there's a lot of oil around this plug in the picture, and I'm not sure what that is. I think the further-out plugs are for wrist pin access, but does this plug have oil pressure behind it? Any tips on what to do about oil seepage as seen here? Thanks! Bry Edited May 8, 2018 by brycarp Quote Link to comment Share on other sites More sharing options...
el_freddo Posted May 8, 2018 Share Posted May 8, 2018 I wouldn't call that oil seepage. Looks more to me like general engine dirtiness. As for oil consumption - what is too much? These engines were notorious for leaking oil an/or coolant externally through the head gasket. I would be looking for leaks on the engine if it's only losing a little bit of oil between changes. If you're having to top it up from the low mark several times between oil changes then there's most likely a bigger issue at play. I would start with replacing the PCV and see if there is any change in oil consumption. Cheers Bennie Quote Link to comment Share on other sites More sharing options...
montana tom Posted May 8, 2018 Share Posted May 8, 2018 That appears to be the wrist pin plug. Not oil pressure but oil vapor behind that. Tighten it up ! I find those to be loose from time to time . Quarter turn on an allen wrench should stop that seepage. Quote Link to comment Share on other sites More sharing options...
montana tom Posted May 8, 2018 Share Posted May 8, 2018 If that 2002 has high mileage I would replace that oil pump with a 10mm one. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted May 8, 2018 Share Posted May 8, 2018 Replace oil pump with a 10mm pump. That is the wrist pin access hole. We seal them with copper washers and Loctite 545. GD Quote Link to comment Share on other sites More sharing options...
Gloyale Posted May 8, 2018 Share Posted May 8, 2018 Replace oil pump with a 10mm pump. That is the wrist pin access hole. We seal them with copper washers and Loctite 545. GD Supposed to be aluminum crush washer. That is what Subaru uses. Quote Link to comment Share on other sites More sharing options...
Numbchux Posted May 8, 2018 Share Posted May 8, 2018 Yep, wrist pin plug. OE washer is 803928010, MSRP $2.05 Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted May 8, 2018 Share Posted May 8, 2018 Supposed to be aluminum crush washer. That is what Subaru uses. We replace all the aluminium crush washers with copper. Wurth supplies all our hardware and we have all sizes of copper on hand in bulk. They work excellent and are cheaper. GD Quote Link to comment Share on other sites More sharing options...
Gloyale Posted May 9, 2018 Share Posted May 9, 2018 We replace all the aluminium crush washers with copper. Wurth supplies all our hardware and we have all sizes of copper on hand in bulk. They work excellent and are cheaper. GD copper and aluminum react with each other. Could lead to a leak at some point. 1 Quote Link to comment Share on other sites More sharing options...
brycarp Posted May 9, 2018 Author Share Posted May 9, 2018 Following the community wisdom here, I bought a 15010AA300 10mm oil pump to put on. Thanks! Bry 1 Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted May 9, 2018 Share Posted May 9, 2018 (edited) copper and aluminum react with each other. Could lead to a leak at some point. Doesn't seem to be any issue with the factory banjo bolt crush washers for turbo and AVCS oil feed being copper against aluminium. Or the water banjo's for turbo coolant supply, etc. Or the brake banjo's on the 4 pot / 2 pot and Brembo aluminium calipers...... And we have never had one leak. Looks like a cost saving measure to me. Copper is expensive. GD Edited May 9, 2018 by GeneralDisorder 1 Quote Link to comment Share on other sites More sharing options...
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