Okay so now that summer is fast aproching up here I want to be able to shut my heater core off without having to splice the lines together. I did a little reasearch and it sounds like I can't just shut one side off like on a Chevy, I'm going to actually need to be able to bypass the heater core when I shut it off so that it won't over heat the car. I already know one thing, im not spending $140 for a new oem valve. I could go to a junk yard and pull one off that I have no clue about and may or may not work, or I could make my own. I would like to make my own but I'm not quite sure how. my idea was a two valve situation, one for the intake side of the heater core and the other for the bypass pipe. So that when I don't need the heater I could reach down and close the inlet and open the bypass pipe. Hopefully the price would be closer to twenty bucks instead of 140 for the new valve. Another option might be a three way ball valve on the inlet side and make one off position open the inlet hose to the bypass pipe and close the heater core inlet, and the other would close the bypass and open the heater core inlet, that would of course cost more around $50-$60.
What do you guys think?