I popped the hood today and there was coolant on top of my header. I dried it up, started my car and it started slowly seeping out of the top of the header. what is the cause of this and what do i need to do?

 

that is the intake, and you need to remove it and replace the 2 o rings, and the intake gasket.

 

^ As above. You could also bang some core plugs into the coolant holes. That way you wont have to worry about the o rings failing again. Also wont need to drain the coolant if you remove the intake manifold again

 

Thank you

 

What cork plus could i use?

 

core plugs aka, freeze plugs

 

Would they withstand the heat?

 

They are metal so the heat will not be a factor.

 

I just grabbed 3/4 inch ones but they are a hair too big. That's the smallest anyone around me Carries.

 

You need 20mm ones

http://www.mazdatrix.com/getprice.asp?partnum=565-101