KAIXEN HID Kit Installation DIY!
My Civics HID DIY Installation
There's no reason to remove the coolant tank to install HIDs. The guides above should be sufficient. The installation is really straightforward. I would probably suggest you take a minute to snap in all the connectors on a carpet if it's your first time. It will make perfect sense to you from there. There's not much to put into words as everything will come together once you get a visual.