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2001 996 47K miles.

The engine temperature or coolant temperature needle has always sat on the 8 (180), once when i did a long 3 hr drive it drifted to then end of the zero, but it was a 3 hr drive on a 90degree day, but no big deal, that was 3 yrs ago.  It has always sat on the 8.  I noticed recently during city driving in about 15 mins, the needle starts to drift to the end of the the zero, and when its on the highway for a few minutes it would lower back into the beginning of the zero, but never back onto the 8.  

No leaks under the car, i see no signs of coolant in the engine, nor do i smell coolant dripping onto hot parts.  

My question is is this a precursor for something failing?  Anything i can check?  

 

Any advice appreciated.  

 

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Just now, Loren said:

Have you checked to see that the front of the radiators are clean?

i have not, but that is a good first start, thanks Loren

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Apart from the radiators, are your fans working at that temperature?

 

 

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yes when i pull into the garage i hear the fans running.  Im going to clear the radiators out first, i think thats a good first step

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33 minutes ago, greg0078 said:

i have not, but that is a good first start, thanks Loren

If you decide to remove the bumper to do a thorough cleaning there is a very good video DIYhere

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Are you sure the engine coolant is actually getting warmer? Could it be a slowly changing or degrading sender unit or gauge? I would verify that the calibration is good by installing a temporary gauge and sender that you first verify the temporary gauge/sender is good by test running the gauge/sender in boiling water on the stove.

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You need to verify the radiator fans are working in both low speed and high speed settings. Durametriccan activate the fans to help you troubleshoot.

You can turn on the a/c and the fans should be on at low speed. Then put your hands on the ground about 1 foot right in front of each front wheel to feel the fans blowing.

Edited by Ahsai

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41 minutes ago, Ahsai said:

You need to verify the radiator fans are working in both low speed and high speed settings. Durametriccan activate the fans to help you troubleshoot.

You can turn on the a/c and the fans should be on at low speed. Then put your hands on the ground about 1 foot right in front of each front wheel to feel the fans blowing.

As I recall the fans run at high speed when the AC is on.

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1 hour ago, Loren said:

As I recall the fans run at high speed when the AC is on.

Um, I need to check but I think the fans are really loud when running at high speed and it definitely sounds louder than when the a/c is ON (and the coolant is not overly hot).

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Ok I just checked on my '03 996. When I turned on my a/c, the radiator fans come on as LOW speed setting. 

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