27-02-2019, 09:16 PM
Hi Stewart. The thermostat is meant to open at 83 degrees so normal operating temperature is 85 degrees-ish. The fans kick in on low speed at 97 degrees on a model with AC. (They'll run at high speed at 107 degrees but mine rarely gets that hot, even in the height of summer).
I am pretty sure the 1.8 has the same set up as the XSi (which is what I have). If it has AC there will 3 thermostatic switches/sensors screwed in to the thermostat housing. The blue one provides a feed to the gauge on the dash and nothing else. The green one provides a temperature reading for the ECU. The brown one is linked to the AC control unit and the fans.
It's possible for the blue sensor / dash gauge to be out while the car runs completely normally. Alternatively, the thermostat is stuck slightly open or could be opening too early. Hard to tell which without a way to check the true coolant temp.
Mine ran at a similar temp to yours (according to dash gauge). Changed the thermostat and …..no difference!! Has been like that for about 2 years now!!
I am pretty sure the 1.8 has the same set up as the XSi (which is what I have). If it has AC there will 3 thermostatic switches/sensors screwed in to the thermostat housing. The blue one provides a feed to the gauge on the dash and nothing else. The green one provides a temperature reading for the ECU. The brown one is linked to the AC control unit and the fans.
It's possible for the blue sensor / dash gauge to be out while the car runs completely normally. Alternatively, the thermostat is stuck slightly open or could be opening too early. Hard to tell which without a way to check the true coolant temp.
Mine ran at a similar temp to yours (according to dash gauge). Changed the thermostat and …..no difference!! Has been like that for about 2 years now!!