I agree.. it sounds like two problems, although the fan not coming on is the one that would get my main attention, since a tiny weep from the thermostat is not that serious in itself and just needs an occasional top-up to keep the beast going until the crystalised coolant drying in the space blocks the leak all by itself anyway...
Hylomar is supposed to be good for water-sealing mating surfaces but I dunno if the pink coolant is more aggressive than the old style glycol based coolants. I had a similar "how did I mess that one up" leak when I refitted a water pump recently. I'm blaming the coolant now..
The rule of thumb for thermostats is that they start to open around 86C and should be fully open at 90C. The fan is supposed to intervene at 92C and cool the engine down to 88C before knocking off.
If your gauge said 3/4 then that would be in the region of 105C. Without any antifreeze in the water, the system pressure alone (if 1.2 Bar) would prevent the beast from boiling over but a 50:50 coolant mix at the same pressure would run up to about 128C... which is around "Max" on the gauge.
Ralf S.
Hylomar is supposed to be good for water-sealing mating surfaces but I dunno if the pink coolant is more aggressive than the old style glycol based coolants. I had a similar "how did I mess that one up" leak when I refitted a water pump recently. I'm blaming the coolant now..
The rule of thumb for thermostats is that they start to open around 86C and should be fully open at 90C. The fan is supposed to intervene at 92C and cool the engine down to 88C before knocking off.
If your gauge said 3/4 then that would be in the region of 105C. Without any antifreeze in the water, the system pressure alone (if 1.2 Bar) would prevent the beast from boiling over but a 50:50 coolant mix at the same pressure would run up to about 128C... which is around "Max" on the gauge.
Ralf S.