INTRODUCTION
This is how I installed an AEM "X series" 150psi oil pressure sensor & gauge on my Forester (2.5L turbo).
It's not the only way to do it. While I suspect most Subaru engines have similar bits in similar places, your situation may vary. Use this writeup as an example, along with some common sense.
PARTS
I used:
- Prosport Remote Oil Pressure Sender Installation Kit ( https://www.carmodsaustralia.com.au/rem ... lation-kit ) relevantly consisting of a female-female 90 degree 1/8NPT connector, a male-male 1/8NPT braided steel hose and a brass fitting for the oil gallery* plugs
- sleeving for the braided steel hose to prevent abrasion
- Oil Pressure gauge kit (consisting of gauge face, wiring loom, **150PSI sender, crimps & an AEM sticker)
- Adel clamp sized to hold the pressure sender
- M6 bolt and nuts/washers
- liquid thread sealant
- Narva "add-a-circuit" ( https://www.narva.com.au/products/54415BL )
- 5 amp automotive fuse
- one straight crimp connector & one ring terminal crimp connector
- gauge mounting solution
- zip ties
[NOTES
*gallery, not "galley". We are not cooking food on a ship here.
** Subarus run high oil pressure. A 100psi gauge/sender will probably not have enough headroom to show you max oil pressure. ]
This guide assumes you have the usual collection of garage tools.
PARTS PREP
The Prosport oil gallery brass fitting had a sharp edge on the wet side:
So I smoothed that down with the pictured deburring tool, plus some sand stones. Wouldn't you know it, the factory also smooths off that edge (stock gallery plug from later in the process shown):
I have seen others run the braided steel hose up and off the the left or right with the sensor attached to the ABS unit or something. I planned to run the braided steel hose under the intake manifold. Braided steel hose will cut through anything it rubs against, so I covered the hose in convoluted plastic sleeve, then this silicone heat resistant sleeve:
The two reasons to run a hose rather than screwing the sensor directly into the engine are:
(a) clearance is an issue under the alternator; and
(b) pressure sensors are noted for having a short life if subject to engine vibrations - better to remote mount on the chassis via rubber. A rubber-lined adel clamp in my case.