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Question:

coolant over flow signs of blown head gasket, or water pump?

I've bleed the lines, and gotten rid of all the air bubbles. I've replaced the thermostat correctly, (triple checked) and I don't think it's the water pump because it isn't leaking what so ever. My temperature gauge is not moving what so ever, and the coolant reservoir over flows heavily, and I can hear a thumping sound in the radiator.

Answer:

Its gonna' take some doin' === Drain the radiator..remove the thermostat..fill the radiator with water and radiator flush chemical..run the motor..until hot..either with the Radiator Cap--ON or OFF.. If you left the radiator cap installed..the engine will need to cool down--to remove it.. Flushing your motor with the radiator cap removed offers time savings.. === Yet..the radiator might over-flow during the flushing. cedure.. === Stand away from the car..and be ready to turn off the motor.. ..safely drain all the flushed material..refill with fresh water and drain out(no need to start thre motor).. === Now..look at your thermostat..does it have a tiny little hole in the flange area.. The flange is the flat portion that supports the opening and allows a place to seal the gasket--there should be a tiny bleeder hole..that's not in the gasket portion.. It allows some coolant to flow--freely.. I once bought a thermostat that was missing the bleeder hole.. I used a tiny drill to replace that item..tiny hole like THIN Spagetti/..so fluid can escape thru thre system.. === With that in mind--get the system back together..check for leaks..//[end]
Flush out the radiator.. check to confirm a bhg with a compression test.

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