follow the lower radiator hose, at the end of it will be this cap thingy with 2 sensors on it, remove that ( 2 10mm bolts ) and pry out the thermostat with a flathead. buy a new one from honda ( 22 bucks ) and put it in with the new washer, put some RTV silicone on the housing and put it back on and torque to 8lbs. attach hose, fill with coolant and let idle