hope someone can help.
last week i noticed my temp gauge was jumping quickly from about 50 deg upto 85. it went back to 85 or so within 5-10 secs but 20 miles later it done the same again. when i got home i cleaned the connector on the sensor at the thermostat housing and it hasn't done it since.
however i have been noticing the car is running very slightly hotter the last month or so for no apparent reason. the car has always sat at 85 on the nose but lately it's crept upto 86/87 on the mway and 90 coming up hills through the gears. if i free wheel the car out of gear down a hill the temp will start to drop slowly which i again assume is normal
i realise the above sounds normal but it's not normal to my car as in 3 years ownership it's always been at 85 so far as i know. i admit i'm watching it like a hawk now so it maybe always done this but it's certainly 2/3 degrees warmer than it was last time i remember....or i'm paranoid because watching it like a hawk now.
i have checked the thermostat is opening with watching the expansion bottle. there is no heat drop off when i put the fans on full with hot air. i bled the cooling system just incase infront of the manifold but was ok.
if i put the fans on full and drive normal it will go down to about 80/81.
again all sounds normal????? but just wondering as the temp gauge going gaga has me paranoid about it.
FYI the car has 48k on it and FVSH.
maybe i'm worrying over nothing