That's good to know.
Measured at what point, I wonder? Usually it seems to sit between 80 and 90 °C (once it has done 15 miles or so to get to a stable temperature). I've never measured anything over 90°C yet. I wanted the alarm to go off before any damage was likely to occur so I had a chance to switch off and let it cool back down. I cannot recall now when the thermostat opens for the coolant, 88°C? 92°C? Either way it seems around the right ball-park.
I have the thermister bolted to the cam cover using one of its bolts. Heat dissipates pretty fast even under the inlet manifold. Guessing the head itself might be 10°C higher at the bottom? In which case I might be measuring 100°C when in reality it is 110°C elsewhere.
Measured via the sensor for the EDC. The gauge needle sits at mid point from 85C to 105C, I can post a table of temperatures this evening if you wish. The hottest point on the engine is the back corner of the head where the over temperature sensor is fitted on later cars. The cam cover is not likely to be representative of the coolant temperature.
Edit added temperature/modulation table
1/08/2020 Start time11:45 Hrs
Dailydriver 136K miles First registered 1/11/2000
EDC Hardware version:- 02 81 00 16 77:Software version:- 10 37 35 12 55
Firmware revision:- 77 86 76 0 3R3
Test conditions:- Outside airtemperature 18C. Fans disabled no viscous fan.
Aircon switched off.
Idle speed 750 rpm
Fuel temp. Watertemp. Modulation. Time. Gauge needle position
7.36 30.48 24.96 11:50 Blue
8.04 40.68 34.32 11.52 Blue
10.76 51.66 42.51 11:55 Blue
14.84 60.40 48.75 11:57 Blue
18.92 70.60 55.38 12.01 Blue
24.36 80.12 56.94 12:04 Between Blue & white
28.25 85.60 58.95 12:06 > Mid point
34.56 90.32 69.37 12.08 Mid point
40.00 95.08 74.10 12:13 Mid point
43.40 99.84 76.05 12:20 Mid point
Dash gauge at mid point from just over85C to 105C I stopped writing at 99C!
Test end time 12:35
Fuel temperature also reaches 43.4with viscous fan & cowl in place.
