[77newell]

It won't be a head gasket since there is none as I described in a previous post. Given the evidence presented thus far, I'm betting that you have a cracked head that is allowing coolant to get into the exhaust ports. The fly in that ointment is that you reported no white or gray smoke when under way. Under power, any coolant from any source in the exhaust would get turned to steam if sufficient heat is available. Still, you have coolant at the exhaust manifold in raw form.