Project GD STI, Adding an Intercooler Sprayer to a Front Mount Intercooler

With the nozzles in place we drilled some holes in these unused tabs on the back of the bumper cover

We plumbed up the nozzles using our hose and some plastic Y fittings we had around the shop.  We zip tied the hoses to the bumper cover using zip ties and the holes we drilled.

Now it’s time to reinstall the bumper and hook up the nozzles to the pump.

Our system is installed and ready to use.  It is unobtrusive and looks like OEM.

A push of the button and our sprayer is working.  We wanted the spray to penetrate the intercooler core and reach the radiator too.  It looked like this is going to do it.  However, after spraying, water would continue to dribble out of the nozzles and the pump would have to re-prime itself.  This would mean you would have to push the sprayer button 2-3 times to start the flow.  We were also worried that since the nozzles were lower than the tank, the tank could siphon and empty itself on the garage floor with the conditions were right. The tank is decently sized, about a gallon so we didn’t want that much liquid dumped on the floor!

For the stock top mount intercooler, the spray nozzles were higher than the tank so this was not an issue.  To prevent this, we decided to install an anti-siphon valve in the sprayer line.