[pistonbroke]

Yes I believe you should see coolant above the tubes in the top tank. Just because your car isn't running hot doesn't mean you don't have a flow issue. If the radiator just cant quite handle the volume the water pumps are sending it it has to go somewhere . The good news is your new engine is running good and your cooling system is working. I never heard, are you running thermostats? There is a simple answer here somewhere. Tim