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Old 06-17-2013, 09:23 PM   #1
BarrettJa
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Default 02 ej205 head oil galley question..

Im having a difficult time finding blueprints, let alone anything that makes sense about the turbo oil feed line off the bank 1 head (USDM passenger head).

My question is simple, yet complicated. I am sick of blowing up turbos in my swapped BE. I am fabricating a positive displacement blower setup, based around a MK IV eaton m62. The only real thing I cant figure out how to handle is the turbo oil feed line. Being that im eliminating the need for it, and the return.. I am looking for suggestions how to deal with it in regards to such a precariously oiled engine to begin with.

My fear is that straight up plugging the hole will divert excess, if not too much volume and or pressure to the rest of the head. The last thing I want to do is put more strain on an already ****ty system. I guess i'm more or less looking for some one with casting knowledge of the oil flow in said head.

The return is simple, plug the hole. Should I engineer a block to take the place of the turbo with a restriction equivalent to that of journal bearings? should I find a bolt, throw some teflon tape on it and stick it in the hole? Should I just use a stainless braided line and route it directly back into the oil pan? or if someone could explain to me how the hell to interpret the FHI illustrations.. LSD? a **** ton of salvia?

thanks in advance..
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Old 06-17-2013, 09:44 PM   #2
Concillian
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You should be good to just plug it.

If you're REALLY paranoid, then measure the entry hole on a vf or TD04 and emulate that with your own oil line / return.

DO NOT just run a straight -4AN to the drain, that's way too much oil. If you don't have a spare turbo, I'll try to figure the restriction in one of the turbos I have laying around.
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Old 06-17-2013, 09:59 PM   #3
BarrettJa
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i have 2 broken turbos and a third with a stripped oil feed port im assuming all the restriction actually happens within the banjo bolt.. in my mind.. no way the bearings offer much more restriction than the miniscule holes in the side of the bolts.

I figured plugging the hole was the most cost effective and sure route. just didnt know what I would be backing the volume into
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Old 06-17-2013, 11:34 PM   #4
Concillian
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OH, right, it's the ball bearing turbos that have the restrictor built into the housing, you're right it's the banjo hole on the side that acts as the restrictor for the journal turbos.

I'd be really surprised if plugging makes a difference. A ball bearing turbo restricts it down to like a 1mm (0.040) hole, and the AVCS motors run a journal bearing turbo plus AVCS from that port. So there's quite a spread of oil volume through there on the various configurations.

Also, it's a straight thread. You don't plug that with teflon tape. Teflon is for tapered threads. You plug it with a short bolt the same thread as the banjo and a copper or aluminum sealing gasket.

Last edited by Concillian; 06-17-2013 at 11:45 PM.
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Old 06-19-2013, 08:27 AM   #5
BarrettJa
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I never have nor will use teflon tape on a tapered thread.. the whole point of the taper is to create a seal.. steaight thread is just piece of mind. In reality I'd probably use a loctite product as teflon does bad things in oil. Regardless, thanks for confirming my suspicions..

If anyone else knows something we don't please chime in



Edit:I just realized you meant the actual thread, not tapered seat. I'm an idiot. I had AN fittings in my head when I read yours and posted that

Last edited by BarrettJa; 06-21-2013 at 12:05 PM.
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Old 06-21-2013, 08:30 AM   #6
BarrettJa
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Any other insight before I just plug this bitch after work today?
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