Help
What you need:
Drill and drill bits
Temp sensor - http://shop.ebay.com.au/i.html?_nkw=lcd+di...ter+temperature (Get the little square one for a few dollars. The one for fridges and freezers etc)
Brass hose fitting that's big enough for the sensor to fit through
2-3m 2 Core shielded wire - http://www.jaycar.co...w.asp?ID=WB1504
Heat shrink
Araldite epoxy
Double sided tape
BSP Tap for the brass fitting (or do the dodgy like me
)Soldering iron
Usual hand tools.
Oh, DOUBLE CHECK EVERYTHING!!! Make sure things will fit BEFORE drilling holes. You don't want to be looking for a new intake pipe because a hole is 10mm out of place......
Step1.
Take your brass fitting and cut most of the hose fitting side off, just before the second notch, and use a file to round it all off on the inside and outside.
Stick your sensor through the fitting so the sensor it through to the threaded side and tape the threaded side up.
Mix up your epoxy and fill the fitting up so it's got no air bubbles. A small cable tie is excellent for scooping and packing the epoxy in.
Once it's dried you should have something that looks like this:
Step 2.
OK, now remove the part of your intake that you want to monitor the air temp in. On my car it is the adapter from the stock intercooler to the intake manifold.
Drill a hole and tap it out. Consult Google to determine the drill size for the size of the thread on the fitting you have.
The cheat way is to drill it out just enough that you can force the fitting through the hole and make it cut it's own thread. This is fine in plastic, harder in alloy (mine worked like that) but impossible in steel. Your choice on what method to use.
I then mixed some more epoxy and put it on the threads of the fitting to seal it up once it's screwed in. You can use Teflon tape or something if you want it less permanent.
Mount your bit of intake back on the car and check everything is fitting nice.
Step 3.
Now you have to extend the cable on the sensor to reach inside the car. Use the 2 core shielded cable to extend the sensor. I cut the sensor wire about 10 cm from the sensor and soldered and heat shrunk the join. Just cut the shield off at this end. Make sure the wire colours match (red to red etc).
(You can see the grey wire in the pic below, the join is just peeking out from behind the thin blue vac line).
Measure out how much cable you need and feed it through to where you want the display. Leave a bit extra to make things easier.
Now, carefully open up the display with a small screwdriver (really easy to do) and solder the extended wire to the PCB, making sure the colours are the right way around. The shield wires can be cut off,
[Optional] Solder about a quarter of the strands to the negative of the battery terminal to provide some sort of shielding to your signal. Pre tinning the wires will make this much easier. Make sure the join is nice and flat though, so it doesn't short out the battery.
Step 4.
Find a convenient place to mount the display and clean the area with wax and grease remover or metho or something. Use the double sided tape to stick it in place.
(Hint, the black tape used for body mouldings is much stronger than the usual white stuff).
You could surface mount it too, if you want to cut a hole for the display. My dash isn't flat anywhere, and I couldn't be bothered.
