Hi, i have an R reg 1998 mk4 1.6 8v astra hatch. The temperature gauge mainly stays in the far left cold section and will only move to about 85 if on the motorway, and about 90 if in traffic. If not in traffic or on the motoway it will drop right down to the cold section again even after a 2 hr drive.
I have taken it to vauxhall (who "think" it is ok, and put it down to cold weather?? and wont even tell me if this is normal for a mk4 1.6 8v astra) i have taken it to a local garage who have spent a whole day looking at it and can't find a fault and said it seems to be working correctly apart from the temp gauge (which they tested as ok). The only thing either garage said is that a diognostic test on the computer might reveal the problem.
If I start it from cold and put my hand on the top of the radiator it stays cold for a while and then gets warm quickly as the thermostat opens. How ever it seems to open when the temp gauge just about moves up to the first line in the cold section and then drops again as the thermostat opens and lets coolant round the radiator. The fuel economy seems ok, no warning lights on the dash, no high idle speed and i always get heat fromt the heater although i get hotter heat in traffic or on the motorway.
Is this normal for a 1.6 8v mk4 astra? if there an easy way to test the actual temp of the coolant? is it likely that it is operating correctly but there is an electical fault somewhere with the temp gauge reading and would a diognostic computer test reveal this?
Please help as vauxhall seem to be useless at answering any of these questions unless i pay AGAIN to have it looked at. an no1 can even tell me if this is just normal for a mk4 1.6 8v astra (all my friends cars and previous cars i have had just warm up to about mid way on the temp gauge an stay there)