Hi , First off, Drain the coolant while the engine is cool. I always drain
the radiator first, there is plug in the bottom. Honda engines have a
drain plug in the side of the engine, but can be tough to get out. I
always ues genuine Honda type 2 coolant , it ia already mixed with
distilled water, so you dont have to worry if you mixed it right.
Cadaiantire green coolant is fine, just dont use any of the orange
dex-cool that GM uses. And always mix with distilled water.