Overheating problem

Tiny
ME.CAPRICE
  • MEMBER
  • 2006 CHEVROLET CAPRICE
  • V6
  • AUTOMATIC
  • 149,000 MILES
I am having issues with my car recently.
Sometimes while going uphill or just waiting at a signal the temperature starts to rise and most of the time temperature goes back to normal after the double fan start, but sometimes it shoots up to overheat point I immediately stop the vehicle and when I restart after like five minutes it goes back to normal.
The problem is I have to move around its part of my job so recently it got frequent like temperature goes up I stop the car after five minutes restart and we are good to go same thing happens after fifteen to thirty minutes of driving.
Kindly note that I only got hot engine sign three or four times and I stopped immediately but normally if the needle of the temperature gauge is one point below the overheat I stop immediately!

I consulted someone they said it is thermostat valve and thermostat itself, but I suspect there is something else because the fans turn on, but sometimes the temperature rises and sometimes it goes to normal. Please help before something serious and expensive repair comes on my head.
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Monday, January 30th, 2017 AT 1:09 PM

3 Replies

Tiny
STEVE W.
  • EXPERT
From the description I would say to check the coolant level and be sure it is full. Air in the system can cause this type of behavior. Then replace the thermostat, do a complete cooling system flush and test the fan controls to be sure they are actuating at the proper temperature.
The new thermostat because it does sound like yours could be failing, the coolant flush because if you did get air in the system the coolant you are running does not like air. The fan test because they should kick on every time the coolant gets that warm.
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Monday, January 30th, 2017 AT 1:48 PM
Tiny
ME.CAPRICE
  • MEMBER
Yes sir, I check the coolant level every day or two.
When the engine is cold I turn it on and open the lid of coolant and its always full.
I would appreciate if you can tell how to check the fan system if they are actuating on time?
And where is the thermostat located in the car?
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Monday, January 30th, 2017 AT 7:03 PM
Tiny
STEVE W.
  • EXPERT
Okay, so the problem should not be air related. That points to the thermostat being the issue even more. The pictures show the thermostat location on that engine. Basically right over the flywheel. The first picture shows the heater pipes that have to be removed to get the thermostat off. Testing the fans involves using a scan tool to verify the temperature they switch on at based on the output of the coolant temperature sensor (which I would probably replace while you have the coolant drained, just as a preventative item).
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Tuesday, January 31st, 2017 AT 6:55 AM

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