Er most modern cars don't have a fan switch. They use the coolant temp sender which is normally counted near the thermostat. pcm with then with fan on. No damping on Ford gauges. Some are even digital and all very accurate when measured witness calibrated temp meter.
Some cars use CHT which actually measures the cylinder head temp of the steel/alloy head and is far more accurate.
Skimming a head only. needs doing when its warped. They have to be allot hotter than 110. But ill ask how do you know that was the max temp it reached.
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MBModels - Schumacher Racing - Vapextech.co.uk - MRT - Savox - SMD
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