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Hi i have finally about to start my motor but im crippled because i need a frew fittings for my defi oil pressure and oil temp gauge. I have a rb26 grex oil relocation kit and on the side it has to slots i believe one is NPT but i could be wrong. The other is way to big for the sensor. Seems like an adapter fitting needs to go in there. 9c8f03691d103c7583fc599c8f0a9249.jpg106f0ee5e2b25c67b06e03b715134a7b.jpg

So yes, there should be a small gold coloured adaptor which goes in the larger hole to space it down for a 1/8 npt fitting, part number 16400519

Here is a few listings for those fittings.

http://www.nengun.com/greddy/oil-sensor-adapter

Hope that's enough to point you in the right direction!

Edited by Jordy32

There was a recent discussion on here about the stupidity of Japanese pipe thread specifications. It is important not to assume that "PT" mean "NPT".

From Engineering Toolbox

Japanese Standards PF - JIS Parallel Pipe Threads

PF threads are functionally interchangeable with BSPP. This is an old designations replaced with G.

Applicable Standards

  • JIS B 202 PARALLEL PIPE THREADS
  • ISO 228/1 PIPE THREADS PT 1: DESIGNATION, DIMENSIONS, TOLERANCE
PT - JIS Taper Pipe Threads

PT threads are functionally interchangeable with BSPT threads. This is an old designations replaced with and R and Rc.

Applicable Standards

  • JIS B 0203 TAPER PIPE THREADS
  • ISO 7/1 PIPE THREADS: DESIGNATION, DIMENSIONS/TOLERANCES
PS - JIS Parallel Internal Pipe Threads (to mate with PT threads)

Applicable Standards

  • JIS B 0203 TAPER PIPE THREADS

More about pipe thread standards.

Thanks i have it ordered. Does anyone know if the defi sensors are all the same from the advance bf gauges to the older link bf gauges. I have the gauge (old bf) but no sensor??

I have these on my Greddy thermostat plate at the block and they required drilling and tapping. I used 1/8" NPT for one to TEE into my factory oil pressure sender, and added a hose attachment for the Haltech oil pressure sensor hose since they instruct you to relocate them. On the other one it is tapped M12x1.5 for my GM oil temp sensor which is an ATI to my Haltech platinum pro plug-in. Haltech recommends remotely locating the pressure sensor.

The GM fitting was M12x1.5, the haltech hose was JIC (or -3 AN) on one side and 1/8" NPT on the other for the sensor.

My stock oil TEMP gauge will no longer work at the expense of me having the Haltech read this constantly and I will be able to set my tune up with their "ENGINE PROTECTION" portion which will allow me to put safeguards in for low oil pressure and/or high oil temps (reduced boost, reduced RPM, check-engine light ON, etc). Which will be more useful to me than a gauge. The final idea being that I will use their GAUGE ART box to display my custom gauge information on a VGA screen in the dash later.

post-136202-0-55307000-1460471310_thumb.jpg

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