Weell i pulled out the old tin can from the water outlet neck with no problems and didnt change the o-ring but put the new t-stat in sealed up the tin can back in and started it back up with no problems. Today i took it for a ride and came home and coolant was pouring out. I can tell exactly where it was coming from but it appeared to be out of the bottom of the outlet neck that connects to the top of the radiator??? Did i do something wrong, I put everything back in the way i took it out?