I have a 55 Buick Special, I am trying to get the heating system working. As of now I cant move the heater Lever on the dashboard to hot, so Im guessing the heater valve is seized. Is there anyway to free it up? Does anyone rebuild it? Is there a different year I can in stall that works the same? Also Both the Defroster Blower motor and the under seat blower are really tough to turn but not totally seized. I tried to take apart the Defroster blower, but the bearing on the fan side of the motor came out so I think I ruined it. I was able to knock it off the shaft and polish and oil the shaft it spins freely now but I cant get the bearing back into the housing. Does anyone have a trick for that? What year blower motors interchange for both the under seat and defroster, I have to imagine a few years should interchange, and there's always some used blower motors on eBay. Or maybe someone on here has some extras they'd like to sell.