Before you get ahead of yourself, I had a leaking radiator once and it was very hard to diagnose. I even brought it to a shop and they missed it too. It kept getting hot, almost to the red. The radiator would always be empty and I couldn't figure out why. No puddles under car. Bottle always had coolant. Pressure test at the shop found nothing. The way I finally found it was to fill the radiator with the engine cold, then drive it until it warmed up, then get out and look under the hood. Sure enough, coolant was leaking out the seam between the tank and the core.
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