Show us your oil drain

[Tyrie]

Hi all,
Can people with turbo 4ag's please post pictures or describe where on the sump they have fitted the oil return. It seems to me (untested theory) that the oil level is almost to the top of the sump and any oil drains in the sump will be under oil and wont function properly...

[Gunner]

every time i have turbocharged a 4a, i have run it back in to the block just above the sump flange, tihs way there is no worry, providing where ur turbo is mounted

[Tyrie]

<div class='quotetop'>QUOTE (gunbz-r @ Feb 7 2008, 05:24 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=482059)</div>
every time i have turbocharged a 4a, i have run it back in to the block just above the sump flange, tihs way there is no worry, providing where ur turbo is mounted[/b]

so you drilled and tapped a thread into the block? That sounds like a lot of effort...


I found this, twincharged 4ag with a low oil return having trouble with oil burning. He put a vent in the return line, I might try this and see if it works.


www.geocities.com/MotorCity/lane/1231/page2.html (http://www.geocities.com/MotorCity/lane/1231/page2.html)

http://www.geocities.com/MotorCity/lane/1231/pix/0011.jpg

http://www.geocities.com/MotorCity/lane/1231/pix/0019.jpg

[Gunner]

u can but its not right

[rthy]

thats simply bizarre, I can't see that doing anything

[maxhag]

it is not hard to make a return to the sump. Would cost you a case of beer........
Mine goes to the sump, as high as possible..... no problems

Come around on the weekend and have a look if you want.....


J Riftin

[Tyrie]

<div class='quotetop'>QUOTE (Maxhag @ Feb 7 2008, 10:22 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=482224)</div>
it is not hard to make a return to the sump. Would cost you a case of beer........
Mine goes to the sump, as high as possible..... no problems

Come around on the weekend and have a look if you want.....


J Riftin[/b]

Yeah I've got one to the sump like that in the pic, and I made another one yesterday, as high as it can go but I'm still having oil pressure problems and blowing oil past the seals.

[reecegze]

Heres mine

http://img504.imageshack.us/img504/8121/picture128qe7.jpg

[PuGZoR]

Okay, little hard to see, but mine's here (http://www.pugzor.net/gboxxmember/oildrain.jpg).

It's on the sump, at the back. Trick is to put a very large line from your turbo to the drain back into your system, so as that it doesn't back up. Fluid dynamics mean the oil will flow back into the sump and mix with the rest of the oil, even if the oil line is above the inlet back into the sump. Basically it increases the capacity of the sump by a few ml's until the hose rises above the oil line. Although my car hasn't run yet, I'm 99% sure on my theory, and I've seen it done this way quite a few times before on turbo conversions. Only 99% because there's always an exception in chem/phys, lol.

[Tyrie]

OK cool thanks guys. Mine is almost the same as reecegze's. I had a smaller drain at the back and had to have a stupid drain line to get to it (see pic). I since changed to the front setup and used 3/4" instead of 5/8" hose, the amount of oil blowing past the turbo seals has reduced, but its still there.

before:
http://www.ae86drivingclub.com.au/dcimages/4/8/4/3/163541.jpg

After:
http://www.ae86drivingclub.com.au/dcimages/4/8/4/3/164184.jpg

[PuGZoR]

Sure it's not a problem with the feed being too thick or under too much pressure? Where are you getting the oil from, and how big is the internal diameter of the feed line? What turbo are you using (model+km's on it)? Your return looks big enough, and I can't see a problem in where you've tapped into the sump... BTW, would suggest you put some kind of sheathing (braided in particular) over that line before it perishes from turbo heat too much.

EDIT: Lol, looks like you used the same stuff to seal the sump up as I did. You seem to be missing a bolt too. :P

EDIT 2: Like the braided water lines you've got happening. Get a similar setup for the oil lines, I demand it!

[Tyrie]

<div class='quotetop'>QUOTE (PuGZoR @ Feb 8 2008, 12:20 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=482469)</div>
Sure it's not a problem with the feed being too thick or under too much pressure? Where are you getting the oil from, and how big is the internal diameter of the feed line? What turbo are you using (model+km's on it)? Your return looks big enough, and I can't see a problem in where you've tapped into the sump... BTW, would suggest you put some kind of sheathing (braided in particular) over that line before it perishes from turbo heat too much.

EDIT: Lol, looks like you used the same stuff to seal the sump up as I did. You seem to be missing a bolt too. :P

EDIT 2: Like the braided water lines you've got happening. Get a similar setup for the oil lines, I demand it![/b]

Oil feed is from the pressure sensor just out of the pics, its exactly the same as yours. Its a -4 braided line with a 1mm restrictor in the turbo end. Flows around 850mL/min. Turbo is a FJ20 T3, with some other Nissan BB core, doesnt seem old and had no signs of oil leaks when I got it.
Yeah I'll insulate it, its ryco high temp oil hose ($30/m) so it shouldnt perish too quick.

Yeah that last bolt in the sump snapped off as I was putting it back in :( Hasnt leaked so its all good :P

I have braided water lines and brained oil feed, feed line cost $115. fuck paying $100+ for a drain line haha

[Tyrie]

I should also add that I think I've fixed it, sump was pressurising as the single cam cover breather didnt flow enough. Is this a common problem with boosted 4ag's?

[reecegze]

all up cost me 300 for my braided lines and fittings !!!

[reecegze]

heres mine