Garrett 2560 Oil Supply Fitting Issues
 

I am in the middle of my first turbo build and I am having some doubts about the 7/16" -24 Male Inverted Flare fitting that I bought for the turbo oil inlet. The threads are correct, but it bottoms out well before the nut reaches the turbo. The way it sits, I would not be able to use a crush washer and it would leak a lot. Am I missing something? Is there somewhere that I can buy a fitting that is not as long so that the nut actually bottoms out?

Also, does anyone know if I will need a restrictor for this turbo? It is a journal brearing model and I cannot find any definitive information online about restrictors for it.

Oil inlet fitting, it is bottomed out in this picture:
https://cimg9.ibsrv.net/gimg/www.mia...db2ad86702.jpg


Oil inlet without fitting, it looks like there may already be a restrictor there but this is the first time I have ever dealt with turbos so I am not sure!
https://cimg2.ibsrv.net/gimg/www.mia...e8016907ae.jpg
https://cimg3.ibsrv.net/gimg/www.mia...81e5905b72.jpg

Thanks in advance for the help!

Honest question: do you know what an inverted flare is?

Please read online. The internet is full of useful information.

That is an inverted flare in the inlet of the turbo. The proper fitting will have a flare that matches it, a recessed flare.

Thanks guys, I see that the flares would match up, but it just seemed weird to me that it bottomed out so early. Also, the fitting that was on this turbo before I bought it appears to have used a washer to seal the fitting.

I did search before posting this thread, but I was not able to find any specific information or pictures on how the fitting should look on the turbo. My searches just give me inverted flare fittings for sale. Could someone point me in the right direction for search this topic?

Thanks!

Flare fittings seal at the flare face. It's fine if the threads don't bottom :)

Just make sure the conical seat at the bottom of the port of the turbo matches and engages the flare on the fitting. It's an inverted flare, so the male threaded fitting has a "female" flare and vice-versa.

It should seal on the flare itself and not leak (you actually don't want the threads to bottom out in this case). The previous fitting probably wasn't flared and sealed via the crush washer.

Thanks guys! That makes sense. I was unsure and could not find my answer online.

Please show me where to find this information...

I honestly did search first, I always do, but I came up empty on this one.

Most of the info when you Google flare fittings is about differentiating different types of flares. Not as much in the way of explaining the very basics of what flare fittings are.

https://cimg1.ibsrv.net/gimg/www.mia...739df45a95.jpg

The left image is an inverted flare. The bottom corresponds with the turbo. You have an adapter with the matching geometry in place of a flared tube & tube nut.

Thank you for the info, I appreciate it! When I searched I was not able to find anything on how the fittings worked, just fittings for sale. Thanks again!

This seems as good as anyplace to ask this question, is the presence of a 4 bolt exhaust housing a sure sign of journal bearings vs. 5 bolt for ball bearing?

That is a good question. I have never been able to find reliable information on how to tell whether a 2560 is bb or journal without having it in front of you to actually check yourself. I have found threads with information based on the Garrett tag, but the numbers on the tag of my turbo do not match anything I have found.

Also, when I type the numbers on my turbo's tag into Garrett's site no information is found.

I'm in the same boat, it's from an old BEGI kit. Heck I have it in hand and don't Know what to look for without pulling the compressor wheel off the thing.

As far as I have seen, 4 bolt = JB, 6 bolt = BB for Garrett small frame turbos.

edit: and don't go to garrett for archive information. Google the number ... the garrett number will usually be the 6 digit number (ex 466543-2) and the manufacturer nuber will be something like 14411-05u20 (nissan).

those 240sx/silva guys have some good nissan info