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Oil Return Fitting, what and where

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Old 10-04-03, 10:16 AM
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Oil Return Fitting, what and where

Well, I keep getting closer and closer to starting this project. I have read to put the hole in the front cover for the oil return line. What fittings are used? Also any pictures of this. That seems to be a negleted picture spot.

My last turbo car had the return in the oil pan. could I put it there instead of the front cover.

Thanks Guys.
Old 10-04-03, 01:03 PM
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Personally, I can't see why not. If you have a turbo bearing failure, at least the metal flakes will go to the pan where the filter has a chance to prevent the stuff from going anywhere else...
Old 10-04-03, 02:42 PM
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Don't put it in the pan, everywhere on the oil pan is under the oil level. You need to return the oil above the oil level. You can use any kind of fitting you want. I drilled taped the front cover 1/2npt and used a 5/8-1/2npt hose barb on the front cover and made my own adapter for the turbo to 5/8" hose barb.
Old 10-04-03, 05:30 PM
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oil from the front cover oil turbo drain goes directly into the oil pan there is even a baffel so it doesnt spray all over oil pump chain so I guess if you had bearing faliure your screwed any way you look at it
Old 10-04-03, 06:15 PM
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You need to drill and tap the front cover right below where the OMP sits. Theres and impression there from where the Japanese 12A turbo return line goes.



~T.J.
Old 10-04-03, 06:23 PM
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Originally posted by setzep
Don't put it in the pan, everywhere on the oil pan is under the oil level. You need to return the oil above the oil level. You can use any kind of fitting you want. I drilled taped the front cover 1/2npt and used a 5/8-1/2npt hose barb on the front cover and made my own adapter for the turbo to 5/8" hose barb.
i am going to put the return line in the oil pan. I have seen it done on other turbo cars. The other people i have seen do this have had NO issues with the mount location and when the car is running is the oil return line still below the oil level?
Old 10-05-03, 10:12 PM
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Originally posted by knight1976
i am going to put the return line in the oil pan. I have seen it done on other turbo cars. The other people i have seen do this have had NO issues with the mount location and when the car is running is the oil return line still below the oil level?
What other turbo cars are you speaking of? Rotary or piston?? Oil pans on piston engines are deep and have room to plumb a return into the pan so it dumps back in above the oil level.

If your oil level is full on the dipstick that is to the top of the pan on a rotary. You can go ahead and plumb your turbo drain into the side of the pan but I don't want to see a post "my turbine seal leaks oil, what should I do".
Old 10-05-03, 10:16 PM
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Driven a turbo FB lately?

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Originally posted by RotorMotorDriver
You need to drill and tap the front cover right below where the OMP sits. Theres and impression there from where the Japanese 12A turbo return line goes.



~T.J.
thats where mine is, and its SHITTY for a s5 manifold and a s5 reworked turbo, trust me
Old 10-05-03, 10:23 PM
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It's shitty how the T2 turbo sits so low in there isn't it? A turbo drain should never have restriction getting back into the engine. Going up hill or even horizontal isn't good.
Old 10-06-03, 01:11 AM
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Get a little electric pump in there and pump that **** around, lol.

~T.J.
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