NJGreenBudd

iTrader: (1)

Hey fellas,

So my stock turbo oil drain line has decided to start leaking like a sieve. Lucky for me it started in the garage one morning this spring and not on the road. I am looking to replace the whole thing from the turbo to the block, I already have the AN oil feed and would like to do the same for the lower. BTW it a BNR Stage 1 hybrid if that makes any difference.

I have come across some kits that claim to be for the 7, wanted to see if anybody on here has had good luck installing one of these. Or can somebody recommend a different kit or list of components to make this a simple install.

Here is the link, obviously I'm not affiliated in any way, can you take a peek and see if this is what I need or kindly point me in the right direction.

http://cgi.ebay.com/ebaymotors/UNIVE...item3cb7accd29

This is the only thing keeping my 7 off the road right now so I am eager to correct it and enjoy the summer season.

Thanks a lot for any help with this matter, have a great day guys!

-NJGB

sharingan 19

iTrader: (16)

Only problem I see w/that kit is the shitty cut on the ss hose. Trying to squeeze that into the fittings will make you hate life.

NJGreenBudd

iTrader: (1)

Okay, I had seen the frayed ends, there are similar kits from other vendors that appear to have better cuts like this one:
http://cgi.ebay.com/ebaymotors/MK1-T...item588c9228af


Maybe I should be asking a more specific question: How do you adapt the oil drain line to the actual block?

When I look at these kits they have the flange for the turbo, elbows, lines and then some double sided threaded piece and single sided threaded piece. Is that single piece what screws into the block itself? What type of adapter is that supposed to be specifically?

I appreciate the help, I've been out of the RX7 loop for a while and while I used to have most of this stuff memorized I find myself having to look up each bit these days. As I am sure these exact topics have been covered over and over again I am going to spend some time searching around the forum and see if I can't find what I need to know as well.

Thanks,
NJGB

Rob XX 7

iTrader: (8)

check himni racing, but I know there was a topic about this not too long ago where someone bought the ebay one, I commented in it also


helpful if you want to make your own: https://www.rx7club.com/showthread.p...ighlight=himni

NJGreenBudd

iTrader: (1)

Okay it looks Himni only sells the feed kits, I need the drain kit.

I found these two threads with lots of info, it looks like the block fitting is a T4 flange as well.

https://www.rx7club.com/showthread.p...drain+fittings

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/turbo-oil-passage-flanges-buy-them-where-507052/

So can anyone verify if this is what I need to connect to the front cover:
http://www.atpturbo.com/mm5/merchant...Category_Code=

Thanks for the help guys!

-NJGB

The CzAR

iTrader: (16)

Glad you posted this, my return line has been leaking so I just started looking for an aftermarket solution. Looks like we'll just need two of the T4 drain flanges, two 1/2" NPT to -10 AN fittings and an -10AN SS line. Any idea how long of a line will be needed? My RX7 is in the process of being shipped to me so I can't physically go out and measure myself.

87 t-66

iTrader: (133)

^ i dont think you can buy it in lengths less than 3 feet. at least where i get my stuff (jegs)

http://www.jegs.com/i/Russell/799/632150/10002/-1

NJGreenBudd

iTrader: (1)

The line will be less the one foot so just buy that, I think summit sells it for $15 for 3ft. edit- just saw they by the 3ft length.

There seems some fitment issues with the S4 turbos, like the flange and AN fitting don't fit under the turbo. I think my BNR Stg 1 is an S5 luckily but I want to see if anybody has been able to do it.

Should look roughly like this:

The CzAR

iTrader: (16)

My BNR is an S5 too so hopefully it works out. I saw on the website you posted they sell custom -10AN Oil Return lines. You can specify length and which fittings it has. ~$44 for a 16" line with one 90 and one straight end.

NJGreenBudd

iTrader: (1)

Would it be better to go:

T4 Drain Flange --> 1/2" NPT to -10AN Adapter --> -10 AN to -10AN 90' Hose End

or simplify it by removing the adapter:

T4 Drain Flange --> 1/2" NPT to -10AN 90' Hose End??

I mean do you really need the adapter in between the flange and the hose end? Is there any reason NOT to use a NPT to AN Hose End immediately off the flange?

And then should we be using a 90' or 45' Hose End anyways, I have heard of some risk of pooling with a 90' but I would like to hear from others. Any benefit of using the 45'?



So, I'm thinking something like this:

ATP T4 Drain Flange (1/2" NPT)


1/2" NPT to -10AN 90' Hose End


10" of -10AN SS Hose


-10AN to 1/2" NPT Hose End


ATP T4 Drain Flange (1/2" NPT)

The CzAR

iTrader: (16)

http://www.atpturbo.com/mm5/merchant..._Code=ATP-OIL1

NJGreenBudd

iTrader: (1)

That's cool you can have the build it but you'll still need the flanges and 1/2" NPT to -10AN adapters at each end.

The parts for the lines I listed come to $46 for 3ft of hose and don't require adapters, still need flanges obviously.

What do you guys think? Is there any benefit to using an adapter?

Jross427

iTrader: (13)

No, my main concern is will the oil's path be completly downhill the entire way?

Jross427

iTrader: (13)

Lookin at the pic u have, its looks like the used a adapter, im thinking to clear the wastegate possibly? I think thats why the line looks so level to me

Rob XX 7

iTrader: (8)

we have a local hose shop, maybe you guys should check into locally.

NJGreenBudd

iTrader: (1)

Okay so maybe we can use one adapter under the turbo like shown and then go right into the flange with the last straight AN to NPT Hose End?

Right it's vital that the oil be able to drain easily, not pool up in the line before entering the front cover. If you read the threads I linked to you'll note that the 90' worked fine for the one guy but he mentioned that a 45' hose end might provide a better slope.

Can others please post photos of their custom oil drain for comparison?

Thanks,
NJGB

NJGreenBudd

iTrader: (1)

Here's an excellant site with lots of pictures of the whole process.

Building Turbo Lines - Mazda RE (FC3S/FD3S)

Two quick observations:

He is using -12AN for the drain which is overkill.

Look at the drain line and see how it actually dips and then rises back to the front cover - this is not ideal. I think leaving out the adapter in this case would allow for better drainage. Instead a 1/2" NPT to -10AN 90' Hose End might be better.

Might just buy the adapter and see how it looks both ways.

RotaryRocket88

iTrader: (7)

I think the optimal setup would be to get the section right under the flange as short as possible & use a 45º fitting. Pass the line under the compressor housing (on the other side of the wastegate actuator), and use a short enough piece of hose to keep it from kinking. A 45º fitting on the front cover end might also help make the turn.

BDC

*Might* be overkill. Still not convinced it is. I've seen so many big single turbo'd Rx7's with crankcase pressure problems when under boost that I can't help but think a "too skinny" drain might be a part of the problem. I could be wrong, though. -10AN may work just fine.

B

drifting in drifting

iTrader: (11)

-10would be the smallest id go -12 is not overkill
Plus overkill is always just enough to me

NJGreenBudd

iTrader: (1)

Okay thanks for the tip about -12AN, it was the biggest I had seen specified so far. I imagine we can step up the size all around to use -12AN if need be, I know you want it to drain easily.

So I ask again, can people please post up what your custom oil drain looks like, part #'s and your impressions, any problems you've had or changes you'd make if you made another one.

beefhole

iTrader: (29)

You guys love to spend money
My oil drain line?
Just a flange with a pipe from the turbo, rubber hose, and a flange with a pipe to the front cover.
It's not high pressure, and I have it secured with screw clamps. No leaks here (least of my problems) for 4 years.

You could even find a cheap stock line in the classified section and "hack it" to fit your needs.

NJGreenBudd

iTrader: (1)

haha, I have just switched back to spending money on the 7, been way too deep into my Volvo lately.

I already have the AN feed line so I want the AN to match for the drain.

But I hear you about the rubber hose, probably fuel line or actual oil hose? either way I get the idea, I just rigged up an auxilliary transmission cooler on one of my other cars and used 3/8" barbs ,oil hose and screw clamps.

The CzAR

iTrader: (16)

I just saw rotary-works has flanges already made for -10AN fittings. Saves you from buying the flange AND adapter if that's the route you choose to go.

http://www.rotary-works.com/mm5/merc...gory_Code=TRBA

RotaryEvolution

iTrader: (30)

even -10 is overkill but what i use. -12 is, well, a waste of money because the ports are only 1/2 the size of the line.