STi intercooler sprayer
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This is a discussion on STi intercooler sprayer within the Engine Performance forums, part of the Tutorials & DIY category; I'll try and walk you through installing one version of IC spray system. First I need to acknowledge my friend ...

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    STi intercooler sprayer

    I'll try and walk you through installing one version of IC spray system. First I need to acknowledge my friend Steve (300Z TT!) who w/o his electrical knowledge I'd still be staring at the pretty parts.

    First parts need for this particular install. I used a dual pump washer bottle (one pump to run the windshield wiper fluid) the other for the IC sprayer. These are oem on the WRX wagon as well as other Subaru models- you may be able to find one used. Next you need some washer hose- sold in 6' lengths at almost all car parts stores. You will also need nozzles- I used the oem STi nozzle (mine only utilizes one as it is a RA splitter). You need a switch- I used a STi oem switch- the manual one. You also need some wire and four female spade ends to fit the spade ends on the switch. They are small and may be difficult to find- I found mine at a Chevy dealership looking through boxes of connectors.

    First you need to remove the old washer bottle, two 10mm bolt heads, the plugh in to the washer pump and remove the hose leading ut of the unit- fluid will come out after you remove the hose.

    You can mount the new one in, reconnect the washer line and add your own hose to the second pump. You'll see there is a second plug in already there for the second pump. Note the colors of the wires- yellow/black and green/red on the washer pump plug and blue/black and white/orange on the 2nd plug.
    Attached Thumbnails Attached Thumbnails viewofplugins.jpg  

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    What we'll be doing is cutting the blue/black wire and splicing it into the yellow/black on the washer plug. In addition we'll be cutting the white/green and adding wire to it- sufficient enough to run into the cab via the gromett on the drivers side floor.

    Here's a rough outline of what we'll be doing:
    Attached Thumbnails Attached Thumbnails icswitch.jpg  

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    cutting the blue/black wire, you can also see the white/green cut w/ added wire (that one gets routed into the cabin). All connections were soldered and taped.
    Attached Thumbnails Attached Thumbnails cutblueblack.jpg  

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    Splicing into the yellow/black wire:
    Attached Thumbnails Attached Thumbnails spliceyellowblack.jpg  

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    We need two ground wires, this is what we did:
    Attached Thumbnails Attached Thumbnails groundwires.jpg  

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    We also want the switch to be lit when the headlights are on, so we tap the viloet wire in the next switch over - the cruise switch. We cut a splice into the violet wire and a add a short length of wire to it. Add a spade connector and it will go on the back of the switch as diagramed above.
    Attached Thumbnails Attached Thumbnails spliceviolet.jpg  

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    wire added to splice:
    Attached Thumbnails Attached Thumbnails wiretospliceviloet.jpg  

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    here's ablurry pic of where we grounded the two ground wires- behind bolt head:
    Attached Thumbnails Attached Thumbnails groundpoint.jpg  

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    Pic of the wire that we ran in from the engine bay (the white/green wire). Also can see the wire we added (spliced into) the violet wire:
    Attached Thumbnails Attached Thumbnails viewviloetaddedwire.jpg  

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    Next we install the switch into the blank and refering to the diagram hook up the wire from the engine bay (originally the white/green) to manual trigger position, the wire that is spliced into the viloet wire, and the two ground wires:
    Attached Thumbnails Attached Thumbnails switchwwires.jpg  

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    Mount your nozzle(s) -there are already oem cutouts for the nozzles on the STi splitter. Make sure you face them the right direction. Steve gave me a good blast in the face on a test .

    Pic of nozzle:
    Attached Thumbnails Attached Thumbnails nozzle.jpg  

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    I just routed the hose paralell to the existing hose- like so:
    Attached Thumbnails Attached Thumbnails routeofhose.jpg  

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    Pic w/ switch installed. Now when you need a little cool down, just give the button a push- it will mist as long as the button is held in.
    Attached Thumbnails Attached Thumbnails icswitch.jpg  

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    Glad I could help. Nice write up Mike!

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    Where is a good place to get the switch and the harness plug?
    '12 WRB Sedan

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