Ok, I have my coolant elbows, water pump, thermostat, LIM gasket, and plenum gasket replaced. I've let water run through the system for a little while, and now gonna run do a few fill/run/flush with just plain water....to get all the Dexcool out. I didn't have a problem getting the drain to open....but can't seem to get it to seal tight again. Just push the petcock in and then turn 1/4 clockwise? I might have broken it as it seems to just keep turning. Thanks!