Turbo oil feed, banjo bolt or other?

Basic tech questions such as future setups, different turbo kits, car diagnosis, etc
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modulation
240sx Wannabe
Posts: 114
Joined: Fri Jun 12, 2015 4:55 pm

Turbo oil feed, banjo bolt or other?

Post by modulation »

Recently got a new oil feed line as my old one was coked full of oil and ruined my turbo which I had to get rebuilt.
I bought "TALL RESTRICTOR -4 size .035" Oil inlet fitting" from ATP but it leaks where it screws into the turbo, and there isn't a way to use a crush washer. Don't think I should use thread sealant right?
I had this happen last time with another AN type screw fitting and ended up just using a banjo bolt but thought the ATP fitting would be better quality.

It doesn't leak all the time, just when the two materials are probably drastically different temps during warm up or cool down between WOT runs.

Who saga has me curious what other people are successfully using?
NukeKS14
240sx Wannabe
Posts: 157
Joined: Thu Jan 09, 2020 8:33 pm
Location: Northeastern KS

Re: Turbo oil feed, banjo bolt or other?

Post by NukeKS14 »

I use a -4an with a 90 degree end for mine and appropriate -4an adapter on my turbski. No leaks here.
modulation
240sx Wannabe
Posts: 114
Joined: Fri Jun 12, 2015 4:55 pm

Re: Turbo oil feed, banjo bolt or other?

Post by modulation »

For the -4an adapter to your turbo do you use any thread sealant? Crush washer? O-ring?
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p00t
Encyclopedia-Nissan
Posts: 1170
Joined: Sun Aug 28, 2005 10:27 pm
Location: Detroit

Re: Turbo oil feed, banjo bolt or other?

Post by p00t »

I am not sure what turbo you have.. maybe I missed it?

For Garrett turbos with BB I use this fitting. It needs long threads so the flare seats on the insert inside.

AN -4 , 7/16"-20UNF
For GT25R / GT28R / GT28RS / GT30 / GT35R & More Turbos
Restrictor (Hole Size) :0.9mm (0.035")
fitting1.JPG
fitting2.JPG
If your turbo has M10 threads it needs a straight or banjo fitting with a washer.
Current Experiment: Project Twin-Charge 2022
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