so my 02 civic ex has been leaking anti freeze but cannot find where it is leaking from have run pressure tests everything i can think of. but i noticed that someone was talking about the manufactures coolant being different and that it was causing head gasket problems.. is this what is causing it to overheat?

 

if you read the entire post about the coolant being bad, then yes. If you're thinking that switching the coolant out, that will do nothing... you need to install a new head gasket and get the head resurfaced as well.