I had a pretty good overheat the other day (hopefully didnt do any damage to the block). I got the car towed home, and opened the hood to find my blue windshield fluid had "magically" turned green

. I pulled out the coil and found what I'm assuming is the thermo-control for the windshield fluid (Unit attached at the bottom of the coil)... which had the piston and spring sitting at the bottom of the washer fluid tank. I wanted to make sure this wasnt some sort of relief valve for coolant/steam (I think the radiator cap does that job

). I'm assuming I can replace that unit or (since I'm in California) just tie the two lines together since hot windshield fluid does me no good here

. Anyway, just wanted to get your thoughts.
Also, would anyone be kind enough to share a PDF of the workshop manual with me?? (Pretty please) I have been searching for one for weeks now with no luck.