On the same subject as cooling, I stumbled on a discovery.
My car was running very hot at about 95°C-105°C.
It's got an M50 engine fitted with a 91°C thermostat with an early M10 type radiator.
By drilling three 5mm holes at the top of the thermostat the temperature is a lot lower.
Warming up time is a little longer but the car now runs at 80°C-85°C on the road raising to 95°C in a traffic jam.
I think that the stat wasn't quick enough for the smaller rad or something.
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