I just noticed something odd. I went to flush the coolant out of my car and noticed after removing the thermostat to see if additional coolant would come out that there was no gasket, only some gooey rtv sorta stuff but it was rather thin. No rubber surrounding the lip of the thermostat. Is this normal? It's starting to leak also after putting it back lol. Not sure if I should get a rubber gasket considering most cars have this (it's for a subaru as well), or just get some permatex rtv stuff?
My car previously didn't leak at the thermostat.