hi there i have a 1992 nissan skyline it has major leak located underneath to the right side of the motor i was able to reach up with my hand and touch it and it felt like a metal plug had pretty much burst so what i was wanting to know is how i would properly gat to it and replace it also what i would need to replace it with as i dont know what the part is called also i would like to know if sealant would work just for the meantime.