19transam81 Posted September 17, 2020 Share Posted September 17, 2020 Ok for those that don’t know... 2012 legacy gt turbo. Wife smoked exhaust valves on cylinder number 4. Heads were done professionally, new guides, valves where needed, seats, they even set up the buckets for me. I put the engine back together, new gasket kit, reused head bolts following Subaru specs and torque. Didn’t need to stretch bolts because they already were. New timing belt and components. Catless down pipe (invidia) custom catback no resonator into sti spt axel back. Tgv was gutted, rods and sensor are still there. New plugs. New pcv and tube New oil light sensor Ok, so car ran fine for about 200 miles, doing an e tune from torqued performance. On the third run, spread out over two days the car felt a bit sluggish. Next morning it was a smoke machine. Turbo sounded weird, almost like the intake was on the other side. Puking oil out of both ends of the turbo. Mind you I did not take off any hard lines or banjo bolts on the turbo, just cleaned it when I had the engine out of the car. Figured I smoked the turbo, I ordered one from online, used from lqm, giant junk yard if you will. Now , the new one is smoking too, looks just as bad smoke wise, its also putting oil out of both ends however, not even half as much oil, sounds fine too, boosts properly were stock wouldn’t go past 8-9 psi on original turbo. I used the hard lines and banjo bolts from the stock turbo and hooked the new one up. I didn’t realize that the banjo bolts are different with different size holes. Can anyone help me with a picture of the proper banjo bolts location. There is a small pin hole and a larger one need to make sure I have them correct. Is there anything else I could have messed up? Maybe an oil line in a vacuum line? I took picture and videos but if anyone has any documents of where the oil, coolant and vacuum go maybe I could double check. Oil is in the throttle body opening, intercooler, the black pipe from the turbo to the intercooler, air intake tube, downpipe, oil is coming out of the mufflers. No codes, no external leaks, just a lot of smoke and the smell of burning oil. Link to comment Share on other sites More sharing options...
coco26 Posted September 17, 2020 Share Posted September 17, 2020 (edited) I put the engine back together, new gasket kit, reused head bolts following Subaru specs and torque. Didn’t need to stretch bolts because they already were. I'm no expert on the oil line arrangement so I can't help there, but that sounds like where your problem is given the recent problem someone else had. Can't remember what thread it was in. Keep a very close eye on your headgaskets though... Head bolts are typically one time use. Edited September 17, 2020 by coco26 Link to comment Share on other sites More sharing options...
dgoodhue Posted September 17, 2020 Share Posted September 17, 2020 Do you have a copy of service manual? The lubrication section in the HSO4 (2.5i section) shows a diagram of the scavenge pump and turbo oil pump lines. The scavenge pump banjo has no filter. The turbo oil line has a restrictor. Keep a very close eye on your headgaskets though... Head bolts are typically one time use. I bought ARP head studs when I did the heads, but I was surprised to see that factory head bolts can be reused. The bolts aren't torque to yield. The FSM has a tighten procedure, but the final tightening of the bolts is to an angle. Link to comment Share on other sites More sharing options...
19transam81 Posted September 17, 2020 Author Share Posted September 17, 2020 I don’t have a copy of the service manuel, wish I did. Doesn’t look like any of the lines either vacuum, coolant, or oil are mixed up? I could be wrong but I would think that it would have smoked like this from the rip if I had one of then crossed up somewhere. Now when I did the rebuilt turbo I may have mixed up the banjo bolts not thinking. I’m dropping the manifold now and checking them out. I know there are two in the turbo. Which bolt goes where? Is the bigger hole closer to the radiator, if I had the car buttoned you and I was standing in front of the car, or is the bigger banjo hole closer to the oil pan? Link to comment Share on other sites More sharing options...
19transam81 Posted September 17, 2020 Author Share Posted September 17, 2020 Yeah most tech reuse the head bolts, it’s pretty safe. All my rally buddies reuse them as well, no issues. Link to comment Share on other sites More sharing options...
19transam81 Posted September 17, 2020 Author Share Posted September 17, 2020 Ok the two 17 mm banjo bolts on the front of the turbo are the big hole banjo bolts. This carries coolant . The only banjo bolt for oil is the small one It’s a 14 mm and a pin hole banjo and I have that in the hard line that bolts up to the back of the head. Link to comment Share on other sites More sharing options...
19transam81 Posted September 18, 2020 Author Share Posted September 18, 2020 http://https//photos.app.goo.gl/2qkDEpAm6qs45bah7 This is cylinders 1-3 exhaust ports. They look wet, so that’s possible valve guide, seat issue. But the heads were just done, but that doesn’t mean that they didn’t mess it up. http://https//photos.app.goo.gl/L9v6Rvmh2fTVrWeE7 This is cylinders 2-4, little moist, but not as bad as the other one. So tomorrow I guess compression test? Anything else I can do to see if it’s valves or if the heads are messed up? Maybe an AOS is enough to take care of the oil? Any other ideas team? Link to comment Share on other sites More sharing options...
poconoracing Posted September 18, 2020 Share Posted September 18, 2020 (edited) Here is the 2012 service manual in .pdf format LMK when you download it so I can delete it off my google drive https://drive.google.com/drive/folders/1NX_IrpmCFzWoHVdxQKeP7qgrP5Pp4h2i?usp=sharing If anyone wants it here is 2010 ---> https://drive.google.com/drive/folders/1ytisEov3XIEU8tmuRj_89nIdaivEqEd3?usp=sharing I'll leave them up for a couple days Edited September 18, 2020 by poconoracing Link to comment Share on other sites More sharing options...
dgoodhue Posted September 18, 2020 Share Posted September 18, 2020 https://photos.app.goo.gl/2qkDEpAm6qs45bah7 This is cylinders 1-3 exhaust ports. They look wet, so that’s possible valve guide, seat issue. But the heads were just done, but that doesn’t mean that they didn’t mess it up. https://photos.app.goo.gl/L9v6Rvmh2fTVrWeE7 This is cylinders 2-4, little moist, but not as bad as the other one. So tomorrow I guess compression test? Anything else I can do to see if it’s valves or if the heads are messed up? Maybe an AOS is enough to take care of the oil? Any other ideas team? I don't think you can display google pictures to open in the forum. I just made them hyperlinks. AOS isn't going to help oil going through the exhaust. AOS is for crankcase. Link to comment Share on other sites More sharing options...
19transam81 Posted September 18, 2020 Author Share Posted September 18, 2020 (edited) Sorry about the google img . What app do you guys use to host photos? Edited September 18, 2020 by 19transam81 Link to comment Share on other sites More sharing options...
19transam81 Posted September 18, 2020 Author Share Posted September 18, 2020 Spark plugs are all covered in oil. Doing a compression leak down test now Link to comment Share on other sites More sharing options...
dgoodhue Posted September 18, 2020 Share Posted September 18, 2020 Is there any oil in the turbo inlet or the plastic tube mounts to it? Link to comment Share on other sites More sharing options...
19transam81 Posted September 18, 2020 Author Share Posted September 18, 2020 #1 is 119 #2 is 121 #3 is 120 #4 is 119 Link to comment Share on other sites More sharing options...
poconoracing Posted September 19, 2020 Share Posted September 19, 2020 (edited) Spec is 142 - 171 with no more than 7lbs difference between cylinders with he throttle plate open *by the way let me know if you downloaded the service manual above so I can take it off my google drive* The only thing i can think of is try a wet compression test and see if you get back into spec. It's possible the nice tight new heads are causing blowby on your rings. It's also possible your valve seals and guides are the issue, but I wouldn't think that would show up as low compression. Edited September 19, 2020 by poconoracing Link to comment Share on other sites More sharing options...
19transam81 Posted September 19, 2020 Author Share Posted September 19, 2020 Is it possible that I could have a vacuum hose and oil hose mixed up? I downloaded the file, thank you for that, very cool. It’s just the thing is consuming qts of oil, not a little Link to comment Share on other sites More sharing options...
19transam81 Posted September 19, 2020 Author Share Posted September 19, 2020 If I need rings.... what rings you guys recommend? Link to comment Share on other sites More sharing options...
19transam81 Posted September 19, 2020 Author Share Posted September 19, 2020 Dgoodhue, lots of oil in the plastic tube that Connects the cold air intake to the turbo inlet and the blow off valve. The blow off valve is absolutely soaked, when you manipulate the blowoff valve with your hand it sounds squishy like WAP Link to comment Share on other sites More sharing options...
19transam81 Posted September 19, 2020 Author Share Posted September 19, 2020 Oil in the intercooler, pooling in the TB, the black tube that connects the intercooler to the turbo, all oil filled Link to comment Share on other sites More sharing options...
FLlegacy Posted September 19, 2020 Share Posted September 19, 2020 You need to follow the oil lines, both hook back up to hardlines on the engine. I don't think there is anyway to get those mixed up with anything else. You really need someone that knows what they are doing to look at it, there are just too many things that could be causing oil issues. There is just no good way to diagnose it over a forum. Essentially you have an ej255 with a scavenge pump, anyone familiar with the platform should be able to help. Link to comment Share on other sites More sharing options...
dgoodhue Posted September 19, 2020 Share Posted September 19, 2020 #1 is 119 #2 is 121 #3 is 120 #4 is 119 I don't think compression is your issue. Did you have throttle open while doing the compression test? Do trust the accuracy of the compression gauge? Dgoodhue, lots of oil in the plastic tube that Connects the cold air intake to the turbo inlet and the blow off valve. The blow off valve is absolutely soaked, when you manipulate the blowoff valve with your hand it sounds squishy like WAP Oil in the intercooler, pooling in the TB, the black tube that connects the intercooler to the turbo, all oil filled I doubt it is compression or the cylinders valve guide causing that much oil pre-turbo. The lines going to the intake tube should all be vacuum/boost related, I don't see how they would get that misrouted to allow excessive oil into your intake. Even if the PCV valve was completely inoperable and the engine had blow-by, I wouldn't expect that much oil this soon in your intake. I wonder if your scavenge pump system is not functioning properly, the oil could be pumped into the turbo but turbo drain pan is not being pump back in the engine. It seems like you already have the exhaust manifolds down, I would double check to make sure nothing is blocked. Link to comment Share on other sites More sharing options...
19transam81 Posted September 19, 2020 Author Share Posted September 19, 2020 Does anyone run an AOS on this car or is there a write up on it? I know oil is coming in just fine. So yes I need to check the return , that’s a good idea. The used turbo I picked up could be bad too, it’s possible they both have blown seals I guess. I ran the car today with the vacuum disconnected from the air intake, I just had them venting to atmosphere. I also ran open downpipe to eliminate the idea that there was oil in the exhaust tubes. Still smoking like crazy and oil was in the turbo inlet, however it did not get into The intercooler or TB. I just let the car idle in the driveway, no boost. But I wonder if the BOV is pulling oil from the intake of the turbo and putting it into the intercooler and TB? You can see the oil spots in the garage where it’s actually leaking out the exhaust tubes https://imgur.com/gallery/zhO7HuG http://https//imgur.com/gallery/zhO7HuG Link to comment Share on other sites More sharing options...
FLlegacy Posted September 20, 2020 Share Posted September 20, 2020 Does anyone run an AOS on this car or is there a write up on it? I know oil is coming in just fine. So yes I need to check the return , that’s a good idea. The used turbo I picked up could be bad too, it’s possible they both have blown seals I guess. I ran the car today with the vacuum disconnected from the air intake, I just had them venting to atmosphere. I also ran open downpipe to eliminate the idea that there was oil in the exhaust tubes. Still smoking like crazy and oil was in the turbo inlet, however it did not get into The intercooler or TB. I just let the car idle in the driveway, no boost. But I wonder if the BOV is pulling oil from the intake of the turbo and putting it into the intercooler and TB? You can see the oil spots in the garage where it’s actually leaking out the exhaust tubes https://imgur.com/gallery/zhO7HuG http://https//imgur.com/gallery/zhO7HuGThe BPV doesn't directly connect to the turbo in that way. If the reference line was pulling oil it would fill the diaphragm not pass it along. The charge pipe to intake is the only other connection. Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
Brett_dub Posted September 21, 2020 Share Posted September 21, 2020 This sounds identical to my current issues. I swapped the banjo bolts, but a separate issue arose where the idle was going up and down on its own, and never got to run the car long enough to see if the oil issue was fixed. I dropped the car off to the tuner/mechanic yesterday, but they won’t open to begin working on it until tomorrow. If they figure it and manage to correct it, I’ll let you know what was done. Link to comment Share on other sites More sharing options...
ibr_adam09 Posted September 21, 2020 Share Posted September 21, 2020 Compression looks fine. You really should just look for the variances between the cylinders more so than what the gauge reads. Not all gauges are created equal. Link to comment Share on other sites More sharing options...
19transam81 Posted September 22, 2020 Author Share Posted September 22, 2020 I’ve got another used turbo coming . I’ll be putting that on as soon as it lands. I’m just out of options here. I drive it for like three days between the tuning and the normal drives around town to get grocery’s and stuff. Then she started puking oil like mad. Yeah I checked the banjo bolts. Large holes are in the coolant side, small pin hole is in the oil side. Washer are all in the correct spot ... Link to comment Share on other sites More sharing options...
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