Mgozz Posted January 3, 2013 Share Posted January 3, 2013 Subaru feeds the turbo oil that has already been through the heads. The heads are known to give off contaminants. The filter is supposed to capture these and stop them from contaminating the turbo bearings. There is a method to the madness. This seems interesting (to me at least...). If the oil has already been through the head it would not be pressurized. I'd love to see a schematic of this to get it straight in my head. I looked through the digital FSM but it doesn't show oil galley routing or internal oil galleys in the head. I could see the turbo being fed off an oil galley that runs through and feeds miscellaneous parts of the head as it would need to be under some sort of pressure in order to make it to the turbo. Now depending on what it runs to and "through" there could be some drawback of the oil when the engine is not running and possible contamination. I guess I'm trying to satisfy my own curiosity here. If anyone has a schematic or can explain further feel free to PM me or post here if it adds content to this thread. Thanks. Link to comment Share on other sites More sharing options...
Oregon OBXT Posted January 3, 2013 Share Posted January 3, 2013 Subaru feeds the turbo oil that has already been through the heads. The heads are known to give off contaminants. The filter is supposed to capture these and stop them from contaminating the turbo bearings. There is a method to the madness. So rather than have head cheese get into the turbo bearing we starve it of oil? Talk about the lesser of two evils! That said, I'm happily running your bypass line on my 16G. Link to comment Share on other sites More sharing options...
ripemeat Posted January 3, 2013 Share Posted January 3, 2013 http://i49.photobucket.com/albums/f267/runurbumhere/oil_flow.jpg Link to comment Share on other sites More sharing options...
mustangendsley Posted January 3, 2013 Share Posted January 3, 2013 Never did mine with 102,750 miles on the car stage 2 all original engine stuff and runs fine. Link to comment Share on other sites More sharing options...
landark Posted January 4, 2013 Share Posted January 4, 2013 Subaru feeds the turbo oil that has already been through the heads. The heads are known to give off contaminants. The filter is supposed to capture these and stop them from contaminating the turbo bearings. There is a method to the madness. I have read on here that the 08s+ don't have the filters (and there also seems to be some doubt if the 07s have them). If true, do you know why that is or did they redesign the oil feed system? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 4, 2013 Author Share Posted January 4, 2013 I have read on here that the 08s+ don't have the filters (and there also seems to be some doubt if the 07s have them). If true, do you know why that is or did they redesign the oil feed system? also, i just realized you have an 07 not an 05-06. the banjo bolt is actually under the inlet and not on the back of the head. see this quote for 07 ^^. Link to comment Share on other sites More sharing options...
m sprank Posted January 4, 2013 Share Posted January 4, 2013 All 4th Gen LGT's have them. 07-09 the oil galley used to feed the turbo was moved by Subaru. Old galley still exists, but it is now plugged. No better feed though. REPEAT all 05-09 LGT's have screened banjo bolts. 1 on each side of the motor. Subaru has used even more in the past. Up to 4 in a single motor. Link to comment Share on other sites More sharing options...
Mgozz Posted January 4, 2013 Share Posted January 4, 2013 That said, I'm happily running your bypass line on my 16G. I've seen this mentioned a bit. Is there a detailed write up for the installation of the lines anywhere? I have used the longer Purlator filters in the past. Now both my cars are on Amsoil oil and filters. I think I use EA15k13 filters. For anyone interested in running them the longer/higher capacity Purolator Pure-One filters are part number PL14610. Where the standard Purolator Pure-One part number is PL14612. Link to comment Share on other sites More sharing options...
Max Capacity Posted January 4, 2013 Share Posted January 4, 2013 PL14612, yep now thats what I remember. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
m sprank Posted January 4, 2013 Share Posted January 4, 2013 Or just run these, like I do: http://www.infamousperformance.net/media/03/a20791513b6c025ef9b17d_m.jpg Subaru 2.0L Oil Filters & Crush Washers - 6 Pack for LGT/WRX/STi Basic oil line kit install instructions: http://legacygt.com/forums/showthread.php/filtered-turbo-oil-supply-line-kit-w-instructions-173373.html Link to comment Share on other sites More sharing options...
m sprank Posted January 4, 2013 Share Posted January 4, 2013 Sorry, could not resist. Link to comment Share on other sites More sharing options...
SBT Posted January 4, 2013 Share Posted January 4, 2013 OEM Tokyo Roki goodness FTW - yes! - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 4, 2013 Author Share Posted January 4, 2013 Why is the OEM oil filter for the OBXT/LGT so 'short'? or should I say so small? Link to comment Share on other sites More sharing options...
Mgozz Posted January 5, 2013 Share Posted January 5, 2013 Or just run these, like I do: http://www.infamousperformance.net/media/03/a20791513b6c025ef9b17d_m.jpg These look a bit longer than the recommended filters (for the 05 obxt at least). Are they a larger, higher capacity filter like the Purolator ones I'm looking at? For reference the PL14610s are 3.5" tall vs. the PL14612 (recommended for my application) at 2.5" tall. Both of these parts have the same mounting plates and diameter. You are essentially getting an extra inch of filtering medium with some 30% increase in capacity. Basic oil line kit install instructions: http://legacygt.com/forums/showthread.php/filtered-turbo-oil-supply-line-kit-w-instructions-173373.html Nice! Thanks! Link to comment Share on other sites More sharing options...
Chris GTO TT Posted January 5, 2013 Share Posted January 5, 2013 Or just run these, like I do: http://www.infamousperformance.net/media/03/a20791513b6c025ef9b17d_m.jpg Subaru 2.0L Oil Filters & Crush Washers - 6 Pack for LGT/WRX/STi I bought 6 of those too, rumor has it they are being super-seeded by the Honeywell blue filters. 2003 Baja 5MT 2016 Outback 2.5i Premium w/Eyesight Link to comment Share on other sites More sharing options...
m sprank Posted January 5, 2013 Share Posted January 5, 2013 Not yet. Honeywell blue are still the standard. Theses are technically listed for 2.0l applications. Yes they are taller. More total filter area. I still sell both, but we have switched over to the black Tokyo Roki unless a customer specifies. A side by side pic for reference. Link to comment Share on other sites More sharing options...
Chris GTO TT Posted January 5, 2013 Share Posted January 5, 2013 Interesting I went in to a subaru dealer where i know the parts guy and asked for a filter for the 2012 Impreza and he said they are all the same blue part number now, even showed me the screen. 2003 Baja 5MT 2016 Outback 2.5i Premium w/Eyesight Link to comment Share on other sites More sharing options...
m sprank Posted January 6, 2013 Share Posted January 6, 2013 I said nothing about Imprezas. I said 2.0l. BRZ is the car they are (officially) made for. Link to comment Share on other sites More sharing options...
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