Krisis,
This forum is just one Krisis after another
I have a hand written note..... in my man
uel...... (he's from Barcelona y'know

)...... that says....... 87 celsius, which from memory must be the temperature stamped on my thermostat........ so that is a rough guide for starters.
Haynes says thermostat fully open at 105 celsius,
Radiator fan, carburettor engines 1st speed cuts in at 93 to 98 C
cuts out at 88 to 93 C
2nd speed cuts in 99 to 105 C
cuts out at 91 to97 C
Fuel injection engines 1st speed cuts in at 89 to 94 C
cuts out at 81 C
2nd speed cuts in at 95 to 100 C
cuts out at 87 C
Oil, chip oil burners

ask me another
Mike