Couldn't find one of these when I looking for a how-to on changing the thermostat, so I thought I'd take a few minutes to snap some pictures while changing it. It was super easy, took maybe 20 minutes start to finish, and is a great way to help your motor run cooler. Tools needed: Siphon pump (bought at Home Depot for $12) Bucket Ratchet 8mm socket Step 1: Remove cap to coolant tank. Use siphon pump to empty coolant out into a container. Step 2: Loosen 8mm bolts holding thermostat housing together The bottom bolt is in an awkward spot... careful when removing it, it would be very easy to drop into the abyss Step 3: Pull thermostat housing apart (A few drops of coolant will come out), and remove the old thermostat Step 4: Put rubber o-ring around new thermostat, and replace. Step 5: Replace thermostat housing and bolts. Tighten bolts down - they are 8mm and threading into aluminum, I'm not sure what the torque spec is on these but DO NOT be Hercules when tightening these down Step 6: Place container with coolant in it above the level of the coolant tank, and use siphon pump to transfer it back over Step 7: Start the car, make sure there are no leaks, and change your fan settings!