I had the radiator replaced and then came home and replaced the thermostat. The fans run on que but the heat gauge rises when the car is idling and seems to fall when I add rpm.|||there is a plug on top of the radiator you have to unscrew and remove but first you have to remove the top radiator hose from the rad end and fill the coolant through the hose put it back when full and fill the rad with that plug out till coolant comes out of the plug hole.that is how you bleed them|||Sounds like you need to "burp" the cooling system, like there's an air bubble trapped in the lines somewhere.

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