Stumped: Oil pressure switch port - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

TheBoss77 · 05-20-2022, 05:14 PM

This one has me a bit confused. I'm trying to re-purpose the oil pressure port on the engine to add an aftermarket sensor by using a splitter-T. For whatever reason the fitting will not screw into the engine. I have purchased two separate fittings and neither fits. But both of the sensors (the OEM and aftermarket) fit in the engine port and into the splitters. I can even fit the splitters into one another, but in the end neither will screw into the engine by more than half turn. I don't want to strip the threads so I'm hesitant on adding significant force.

Anybody got any ideas?

NoHaveMSG · 05-20-2022, 05:17 PM

Is that adaptor pipe thread, or BPST thread?

TheBoss77 · 05-20-2022, 05:23 PM

Quote:

Originally Posted by NoHaveMSG

Is that adaptor pipe thread, or BPST thread?

Both of them are 1/8 NPT

NoHaveMSG · 05-20-2022, 05:30 PM

Quote:

Originally Posted by TheBoss77

Both of them are 1/8 NPT

Stock threads are 1/8 BPST.

https://www.ft86club.com/forums/showthread.php?t=89666

TheBoss77 · 05-20-2022, 05:33 PM

Gotcha! Thank you. I'll see if I can find a BPST to NPT splitter.

Quote:

Originally Posted by NoHaveMSG

Stock threads are 1/8 BPST.

https://www.ft86club.com/forums/showthread.php?t=89666

NoHaveMSG · 05-20-2022, 05:37 PM

Quote:

Originally Posted by TheBoss77

Gotcha! Thank you. I'll see if I can find a BPST to NPT splitter.

I ran into this before too so I know the headache. There are some sandwich plates that have ports in 1/8 npt so you don't need an adaptor. I have been running a BPST to NPT adaptor for a long time with no issues though. Just be careful as sometimes the pressure senders have a long probe and it isn't compatible with an adaptor. Or maybe that was the temp sensor, I don't remember

TheBoss77 · 05-20-2022, 05:58 PM

I'm just glad that there's a reasonable explanation for the issue and it's not me going crazy or senile. The temp sensor is the one with the longer probe, the pressure sensors are short, definitely no fitment issues there.

Quote:

Originally Posted by NoHaveMSG

I ran into this before too so I know the headache. There are some sandwich plates that have ports in 1/8 npt so you don't need an adaptor. I have been running a BPST to NPT adaptor for a long time with no issues though. Just be careful as sometimes the pressure senders have a long probe and it isn't compatible with an adaptor. Or maybe that was the temp sensor, I don't remember

FrickingReallySlow · 05-20-2022, 06:01 PM

https://www.amazon.com/gp/product/B0...9ROA0I31&psc=1

Just use this adapter, on the end you put the original oil dummy light, on the sides you put your oil pressure sensor

Quote:

Originally Posted by TheBoss77

Gotcha! Thank you. I'll see if I can find a BPST to NPT splitter.

TheBoss77 · 05-20-2022, 06:04 PM

Quote:

Originally Posted by FrickingReallySlow

https://www.amazon.com/gp/product/B0...9ROA0I31&psc=1

Just use this adapter, on the end you put the original oil dummy light, on the sides you put your oil pressure sensor

Thanks, but I ended up buying an adapter with BSPT male, BSPT female and NPT female. That way the stock pressure sensor will fit correctly. It's coming from China so it's going to be a while.

EDIT: Disregard the above, realized that this thing also has BSPT female.

fminicooper · 05-20-2022, 07:02 PM

There is an oil port on top of the engine, closed by a 10mm Hex if I am not wrong.
Looks like safer than havinf an string of connector/splitter.

At least is what I did.

NoHaveMSG · 05-20-2022, 07:05 PM

Quote:

Originally Posted by fminicooper

There is an oil port on top of the engine, closed by a 10mm Hex if I am not wrong.
Looks like safer than havinf an string of connector/splitter.

At least is what I did.

I run my temp sensor there. I just sent it to another member through text.

https://www.rallysportdirect.com/par...waApocEALw_wcB

TheBoss77 · 05-20-2022, 07:31 PM

Quote:

Originally Posted by fminicooper

There is an oil port on top of the engine, closed by a 10mm Hex if I am not wrong.
Looks like safer than havinf an string of connector/splitter.

At least is what I did.

Thanks, but I'm already running oil temp sensor in the galley. Can't use the Tee there because the oil temp readings are way off from what OBD is reporting.

Grady · 05-21-2022, 12:49 PM

Be careful adding a lot of adapters and weight on an oil pressure line. You should use steel fittings. Long adapters and brass can crack due to vibration.

7 skulls · 05-21-2022, 06:07 PM

Quote:

Originally Posted by TheBoss77

Thanks, but I'm already running oil temp sensor in the galley. Can't use the Tee there because the oil temp readings are way off from what OBD is reporting.

I ran my oil pressure sensor on a whip from the top oil gallery and used a pivot dual gauge reporting from the OBD for oil temp.

05-20-2022, 05:14 PM	#1
TheBoss77 Member Join Date: Jul 2021 Drives: Toyota 86 Location: Kitchener, ON Posts: 61 Thanks: 30 Thanked 49 Times in 32 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Stumped: Oil pressure switch port This one has me a bit confused. I'm trying to re-purpose the oil pressure port on the engine to add an aftermarket sensor by using a splitter-T. For whatever reason the fitting will not screw into the engine. I have purchased two separate fittings and neither fits. But both of the sensors (the OEM and aftermarket) fit in the engine port and into the splitters. I can even fit the splitters into one another, but in the end neither will screw into the engine by more than half turn. I don't want to strip the threads so I'm hesitant on adding significant force. Anybody got any ideas? Attached Images

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05-20-2022, 07:02 PM	#10
fminicooper Senior Member Join Date: Dec 2017 Drives: FRS Hot Lava Location: Houston Posts: 114 Thanks: 82 Thanked 51 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	There is an oil port on top of the engine, closed by a 10mm Hex if I am not wrong. Looks like safer than havinf an string of connector/splitter. At least is what I did.

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