half of these leaks you just need to put some good adhesive sealent. every1 fucking panics and gets a new thermostat housing. mine was leaking very slowly, we whipped it off and put some adhesive sealant on where metal part is where it moves. fine now

and fuck knows where that geezer got that from, you cant just replace that o-ring, it comes built in to the housing????????????????? you need whole thermostat housing.

just sealllllllll it