I just had a cold start sputtering...loss of coolant (maybe 1-3 ozs (at the end)). This happened after a substantial overheat and radiator neck blowing apart at the end...before I knew anything about cars!
In the end, I don't know what tests the shop did, but they showed me the cracked head.
I wasn't overheating, but I wasn't losing a lot of coolant either and kept it topped up. I went for a few months until I knew it was something serious. Then, 6 months after the work was done, some idiot totaled my car! sigh
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