I had steam coming from the hood yesterday on the drivers side. Opened up the hood looked inside and found antifreeze residue on the wiper motor cover. So I tried to look some more the heater core hoses are dry and it looks like the water is coming from the drivers rear corner of the head. It makes sense that I have residue on the motor cover if it is coming from there. My ? is, is this what I think it is and how hard and expensive is it to change it out myself or have it done by someone?