156 GTA Temp Gauge Puzzle
Question for you all regarding the running temp of a 156 GTA.
The gauge seems to read about 78ish when driving at motorway speeds (or even 40+ mph)
It sits at 90 whilst doodling along at 10 to 20ish
And, if stuck in traffic, it goes up to 95ish, fans cut in and it cools again to 90...... This behaviour is usually a sticky thermostat.
So I got the thermostat changed at the last service along with belts and all sorts. and there was no change.
After a while I decided that perhaps it was a dodgy thermostat that had been fitted, so I ordered a new one from Alfa Workshop along with a temp sender (the sensor in the thermostat housing) and a radiator as mine was starting to weep and new hoses and coolant.
After much skinned knuckles and snapped rusty bolts, the car now has new thermostat, temp sender, radiator, hoses, coolant, expansion tank, expansion tank cap and all was successfully bled...... and guess what? It still sits at 78ish on the motorway, yet sits at 90 when driving slowly.
Can anyone else confirm that this is normal for the GTA or do I need to look at changing something else? I can't see it being the gauge in the dash, as it reads 90 and fan cut in and out temps correctly.
Attached is a photo of it sat at 60 mph.
(post cleaning photos also attached for your viewing pleasure.)