Here is the completed hole.
To protect the wires we ran a grommet in the hole to prevent the metal edges from chafing the wires.
Here is the grommet in the hole ready for wires.
To thread the wires through the firewall Vince used a shoelace to first get through the hold and down into the interior of the car.
The gauge wires are pulled through the cowl.
The shoelace was used to pull the gauge wire through the cowl, then an existing hole through the firewall was used to get the wires into the engine compartment and down to the sensors.
8 comments
The thread type should be called out as BSPT, to differentiate from BSPP. BPT is an incomplete designation. It is interesting to see the British influence on Japan carries through to this day.
You are very bold drilling a vertical hole through your cowl into the driver’s compartment. Here in the northeast I would be very concerned about water intrusion. I’d be filling that grommet with RTV or some other type of sealant.
I stand corrected, upon closer inspection, it looks like you may have a BSPP (parallel) connection that seals on the face rather than a BSPT connection that seals on the threads.
It is actually not a vertical hole, it just looks that way in pictures and its near other OEM pass-throughs.
I stand corrected, this looks like a BSPP connection that seals on the face rather than a BSPT connection that seals on the threads.
I installed my Oil Pressure and other gauges the exact same way. I was feeling kind of insecure thinking that there could have been a cleaner way to do it (of course there is), but knowing that others have done the same makes me feel validated.
Are these more accurate than an OBD2 gauge (scangauge, plx dm100, etc) ?
As accurate.
Where did you guys get the 1/8″ bspt to -3 an adapter from? I am having a hard time finding one! If you have extra, can I buy it off you guys 🙂 I’m local to socal.