Err so your saying combustion chamber temp is the same as coolant temp? Which it isn't btw. And driving for 4 miles without coolant isn't going to warp cylinder head.
Warping is cause by uneven Thermal load across the head....
I may have said the wrong temperature cause I was trying to be simples 80 for the old indirect injected pug engines 87 for tdi with 5 phase injection, yes I know about knock sensors to allow you to run the engines as lean a possible. All I was saying was saying it a not a good idea to let it run hot.... And I said eventually AND not immediately!!
And are you sure there isn't a damping algorythm on the ford gauges at all? I am sure there is.
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