I don’t think I could compare your description here with my question because in your case the water (coolant) was present in the water jacket, even though you had no pump function. So even without a pump, the fluid in the head would absorb some heat. My question assumes there’s no water or coolant in the head.
It’s not a big deal really. I can put it back together without running it any longer than the 10 seconds I already did.
I was just wondering what a safe run time might be for an LT1 aluminum headed engine with “no coolant” might be.
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