i'M GETTING A LEAK OUT OF MY THERMOSTAT HOUSING AREA THAT i CAN'T PINPOINT. tHE THING DOESN'T LEAK UNTIL AFTER THE PRESSURE FROM THE SYSTEM IS RELEASED. IN OTHER WORDS AFTER IT COOLS DOWN COMPLETELY. sHOULD THE RAIATOR PRESSURIZE FOR SEVERAL HOURS AFTER THE ENGINE IS SHUT DOWN? MY UPPER RADIATOR HOSE STAYS PRESSURUZED FOR SEVERAL HOURS AFTER SHUT DOWN....IS THIS NORMAL?. I HAVE A FEELING THE THERMOSTAT o SEAL MAY BE THE CULPRIT BUT BEOFRE I CHANGE THE THERMOSTAT I WANTED TO GET ALL YOUR OPINIONS. I JUST PUT A NEW IPD CAP ON THE RESERVOIR AND THE LEAK OOCURS WHEN COOLED DOWN AND ALONG THE UPPER PART OF THE HEAD STARTING UNDER THE THERMOSTAT HOUSING. ANY HELP IS APPRECIATED!