Eagle 1662 Report post Posted December 29, 2007 My Temp gauge is reading just above the 1\4 mark while highway type driving, when left to idle slowly moves up & sits dead on 12 'o' clock position. I thought it was the thermostat so replaced it with a new one and still the same thing. Im thinking maybe coolant temp sensor is faulty?, any thoughts appreciated. Cheers Quote Share this post Link to post Share on other sites
ducatiss 1 Report post Posted December 29, 2007 yes most likely the temp sensor so replace that. Could also be the gauge or a faulty instrument cluster. I take it that the thermostat was the same temp rating as your old one? Quote Share this post Link to post Share on other sites
Greg111 13 Report post Posted December 29, 2007 Whilst your driving the you have airflow through the radiater so the coolant will stay reasonably cool hence the engine will stay reasonbly cool, when the engine is idling theres no airflow through the radiater so the engine will heat up to its operating temp (88-90 degrees) which is the 12 oclock position on the gauge so technically it sounds about right. Quote Share this post Link to post Share on other sites
Silver Fox 43 Report post Posted December 29, 2007 I'd check the viscous fan, if it's not working properly it can stay on and keep the car running cool until stationary. Quote Share this post Link to post Share on other sites
Eagle 1662 Report post Posted December 29, 2007 Not sure about the thermostat didn't look, same thing happened with the old thermostat in so im pretty sure its right. Fan seems to work alright as good as an old fan does, if its anything like the E34\E32 you know when its on. Ill replace the sensor and hope that does it. thanks Quote Share this post Link to post Share on other sites
