cam belt just done. i'm kicking myself for not getting the water pump replaced at the same time just to eliminate that as well.
i guess it's between 95 and 100 so maybe i have nothing to worry about but it is warm enough for the fan to kick in. it cools down if you coast down a hill but it doesn't seem right that the fan is keeping the engine cool.
the radiator made a big improvement to start with. it warms up quickly and the top radiator hose is hot so the thermostat is working but maybe it's not opening fully. perhaps i'll have a look at that first.
Couple of things first....the temp gauge on a GTV isnt linear so the 90 deg at the top, the markers on each side represent 80 deg and 100 deg.
The fan normally should kick in about 92 deg however if you are anything above 20 mph that is as much good as a choccie fireguard, why because the air coming in through the front is acting against the fan...and even worse if the fan is on high speed.
Also have you got the A/C on....because that adds extra heat and loading to the engine and it runs warmer...except in traffic on my car anyway when it cools it right down, fan is on high speed...
There are known problems as has been said here with water pump impellers slipping at higher temperature, i think i have that symptom, however the guy who services my GTV (an Alfa Master Techy!!) says as long as it goes no hotter than 100 all is ok in normal operating parameters...
As the advice say you can check with a laser thermometer i did and it appears to be cooler than the gauge...therefore i believe every GTV has its own peculiarities.
Best thing to do in the interim, change your cooling fluids, a good backflush is advised, make sure you use Paraflu coolant approx 50-50 mix, making sure you have the heater on full when you bleed the air out of the system...