Darth SpecB Posted December 9, 2018 Share Posted December 9, 2018 I am replacing the oil return hose at the bottom of the turbo. I cut it a little bit longer for easier installation. Now the hose is kinked. Will this be an issue causing excessive oil pressure? Should I take turbo back out and cut the hose, or will the oil pressure be able to blast through that kinked corner without a problem? Thoughts appreciated. Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
Darth SpecB Posted December 9, 2018 Author Share Posted December 9, 2018 Here's a visual Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
rhino6303 Posted December 10, 2018 Share Posted December 10, 2018 I would take it back out and shorten the hose. That kink is pretty drastic, unfortunately. Link to comment Share on other sites More sharing options...
Infosecdad Posted December 10, 2018 Share Posted December 10, 2018 Yeah, there is almost no pressure on the return, that would likely bad issues. Also, make sure that you are using a hose specific for oil. Regular hoses will swell and leak. Link to comment Share on other sites More sharing options...
apexi Posted December 10, 2018 Share Posted December 10, 2018 No way I would leave that... Link to comment Share on other sites More sharing options...
Darth SpecB Posted December 10, 2018 Author Share Posted December 10, 2018 I ended up pulling it out and cutting the hose. The hose still appears to be at a weird angle, as it was originally. Something is causing it to spread on the bottom sprouting a leak. Does anyone have a picture of how the return pipe should be bolted on? I have a feeling whoever replaced the turbo, bolted it on backwards. I may have to buy an OEM hose that is bent correctly. Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
JmP6889928 Posted December 10, 2018 Share Posted December 10, 2018 The return line on the bottom of the turbo has a slight bend in it. The slight bend should be pointed toward the compressor housing-not the exhaust housing. Link to comment Share on other sites More sharing options...
JmP6889928 Posted December 10, 2018 Share Posted December 10, 2018 Here's a better shot. Link to comment Share on other sites More sharing options...
Darth SpecB Posted December 24, 2018 Author Share Posted December 24, 2018 Does anyone have a rear photo of D25 heads from 08+?(no halfmoon seals)I read there is an extra oil port on passenger side that is under pressure, plugged with a bolt and washer. I have replaced every oil seal in that area, except for that crush washer and I'm still getting leaks. If there is indeed a bolt plugging an unused oil port, is removal of turbo needed? I have done it 4 times, but I'm not looking forward to a 5th. Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
Darth SpecB Posted December 26, 2018 Author Share Posted December 26, 2018 Pulled the turbo off again. Sanded down the return pipe flange as flat as possible. Added some permatex ultra black to both sides of gasket. Wiggled turbo on once again, this time with worm clamp on top of hose. Re used stock spring clamp for bottom of hose(pipe into head). Fired her up and leaking even worse than the past 2 times. This leak is killing me. Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
rhino6303 Posted December 26, 2018 Share Posted December 26, 2018 I went through this on my current turbo. I sanded my flange flat and reinstalled and it still leaked. I realized I installed the flange backward (180 degrees off) and it was pressing against the turbo support bracket. This bent the pipe just enough that it would always leak. I ended up buying a new oil return pipe (old one was bent just enough from installing backwards) and reinstalled the new one correctly. There are no longer any leaks. Link to comment Share on other sites More sharing options...
Darth SpecB Posted December 26, 2018 Author Share Posted December 26, 2018 Yeah I made sure the pipe was angled the correct way, so I'm slumped atm... Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
Max Capacity Posted December 26, 2018 Share Posted December 26, 2018 Did you use any red RTV sealant on the gasket at the flange ? 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...
Darth SpecB Posted December 26, 2018 Author Share Posted December 26, 2018 I used black rtv, I wonder is red is any better? Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
Darth SpecB Posted January 2, 2019 Author Share Posted January 2, 2019 After a year of dealing with this nasty leak, I have finally discovered the culprit. Its coming from the oil feed line coming off from the head. Just ordered an IAG line. This intake manifold business is not going to be fun. Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
lilredwagon Posted January 3, 2019 Share Posted January 3, 2019 Actually, I just replaced my turbo oil feed / AVCS line with the IAG line. I didn't have to remove my intake manifold, just the turbo. But I have a silicone turbo inlet so I was able to fold the turbo inlet back to gain access to the bolts. Link to comment Share on other sites More sharing options...
Darth SpecB Posted January 4, 2019 Author Share Posted January 4, 2019 That's good to know! Just as I was going to ask mods to take this down. I have silicone inlet as well. The turbo is still a pain but i can do that in about 1 hour after doing it 5 times. I have a metal bracket over the fuel injectors and wiring. It also covers the top of the avcs bolt partially. Sent from my SM-G950U using Tapatalk Link to comment Share on other sites More sharing options...
lilredwagon Posted January 4, 2019 Share Posted January 4, 2019 https://www.iagperformance.com/IAG-OEM-Location-Turbo-Oil-Feed-AVCS-Line-WRX-STI-p/iag-eng-2070.htm If you find the installation instructions from their order page, it talks about the different styles. You probably have the same as me - Style B, since yours is an 09, and mine is an 08. The bracket that covers the injectors is easy enough to take off to get access to the AVCS banjo. The complicated ones are the ones under the turbo inlet. If you can fold the inlet out of the way, you can get a combination wrench on that bolt. Once you get that out, you can plug that easily enough with the supplied bolt. The rest of the bolts are on the outside of the casing, so they're pretty easy to get to. The other bolt that I couldn't get to was the bracket that holds the line in place under the inlet. I just left that there, and cut both ends of the stock oil tube under the turbo inlet and just left it there. If it's not being fed by anything, it won't leak anything! Once that's out of the way, the IAG line just bolts up as part of the re-assembly. Not too bad. Link to comment Share on other sites More sharing options...
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