Originally Posted by Jerr (Post 3397640)

Hey all! I've been struggling for a few days with a technical issue installing an Oil Temp Gauge from AEM.



I recently ordered this guy:



https://www.rallysportdirect.com/par...e-digital-52mm



And read thread after thread of locations and adapters needed to support these gauges. It seems like most people linked this adapter:



https://www.rallysportdirect.com/sho...il-galley-plug



Which apparently now does not exist. I also came up with more questions than answers looking up "sub11024aa210", which is a valid part number, but refers to a M18x1.5 male to 1/8 BSPT female adapter for an EJ motor, and my sensor is 1/8" NPT. I therefore ordered one off of amazon just using the search term "1/8 BSPT to NPT adapter" and came up with this:



https://www.amazon.com/Dewhel-Female...dp/B00V5Q6GME/



However, the temperature probe on the AEM sensor is too thick to fit inside the center hole, and even if dremeled out, the tip of the probe is short and would not reach out the other end. :bonk::bonk:



It cannot be this difficult, can it? I assume everyone who posted in those threads got their oil temp sensors/probes working, so my question is, how? Is there another adapter I can use with a larger inner diameter and shorter length? I'm afraid dremeling this adapter out too far will weaken it to a point of failure.



Thanks in advance for any assist.

Originally Posted by Jerr (Post 3397642)

Thanks for touching base!

The inner hole of the adapter is smaller than the width of the AEM temp sensor probe.

If It's okay to dremel it out I suppose I can go that route, but I've been reading lots of threads about inaccurate temps based on location as well and figured indirect access to oil would make the reading cold.

So for full clarification: the stock pressure sensor, and the oil galley plug on top of the motor are both 1/8" BSPT/PT correct? Neither is M18x1.5?

-J

Originally Posted by Jerr (Post 3397650)

Thanks again. The confusion on port size came from (very old) threads which all linked to the aforementioned Subaru part which is M18x1.5 thread into the engine and allows for a 1/8" NPT sensor (and a wider hole for the prong). If everything is 1/8" BSPT, I don't see why they would have linked it.

I'm staying away from the "T" adapters since they're prone to failure/cracking at the mount.

Originally Posted by EndlessAzure (Post 3397665)

@Jerr I think your problem lies in the difference between how you are using the port and how most people have used it on this forum.

Most people who use the oil galley location actually incorporate a pressure sensor & gauge (not temperature). The pressure sensor cavity is flush and doesn't need to probe through like a temperature sensor.

• The car already has built-in oil temperature. You can pull it up via OBD.

People link 1/8" BSPT adapters because the majority of non-US made gauge/sensor kits popular on import platforms actually use BSPT (think Blitz, HKS, Defi, Greddy, Apexi, TRD, Pivot, Revel, etc.)


If you want to make this easy on yourself and you want to press on with an NPT temperature gauge, get a sandwich plate from a US make. Mishimoto has one that utilizes 1/8" NPT.


I don't see any problem boring out the BSPT to NPT adapter as long as you feel comfortable with the amount of material left over for the threads. The engine oil system only goes up to ~200 psi. Metal fittings are plenty strong for that