I have a bad coolant leak somewhere and it doesn't appear to be visibly leaking anywhere I can see. I did notice this fluid on top of the intake manifold (I think that's the intake manifold)that is an orangish-brown color and kinda looks like oil. I'm not for sure wether it is oil or coolant because I think I might have a slow oil leak as well. Does oil leak from this area? Or is it sure to be coolant?