Yet another coolant question

[Cozmo]

I've been leaking coolant from the overflow tube. Changed out the thermostat and its still leaking, WHY!!!

 

[disco1]

It could be that you have a small leak some where that could be sucking air into the system. I hope it's not a head gasket. Do you have any oil in the coolant?

 

[joey]

I read this post yesterday, and couldn't think of a reason. Till this morning when I woke up (scary thinking about rover issues in your sleep), The only thing that I could think of was a head gasket.