QuestionI have a 1997 Ford Taurus with the 3.0L SOHC V6 which has approx. 104,000 miles on it. Past history : had head gaskets done, all 100k service except for an alternator which was just done. The issues I have is when sitting in the car and driving it, the coolant temp doesn't rise, but after a good 30-45 minute drive, it start's to rise at a snail's pace. And after some extended research, finding nothing. I have some questions, Whats the fix if there is one? And If its the temp sensor, where is it located and where can I pick one up locally.
I forgot to also add that this isn't my car, but one I'm fixing for a friend that needs it soon. So Id like to get it done as soon as possible.
AnswerStephen,
Being a mechanic yourself, I'm going to ask a couple questions. After driving it around if you touch the radiator/hoses are they as hot as they should be? if so I think it is safe to say that the problem is in your temp. sensor, or possibly the gauge itself. Do you have a thermometer that you are able to mease the outside temp of the radiator? Normally it should be reading about 1805-200 degrees fahrenheit.
Before we start blaming the engine coolant temperature sensor and replacing it make sure the rest of the coolant system is in good condition. All of the following items will affect gauge reading:
Coolant level,Radiator Fan,Water Pump,Fan Belts/tension,Thermostat,
and the wiring harness condition
The Engine Coolant Temperature (ECT) sensor is a thermal transistor, which means it allows less electricity to pass through the sensor the warmer it gets. The ECT receives the “Signal Return” voltage from the EEC, then allows a certain amount to return back to the EEC. Because the ECT is in direct contact with the engine coolant flow it changes resistance in response to the temperature of that coolant.
On the taurus the sensor is on the rear of the engine block near the thermostat.
I hope I was able to be of a little help. If so please remember to rate this answer. Thank you for the question and good luck in everything.
