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Old 05-21-2019, 11:02 PM   #1
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Overheating...maybe

I have a 2010 Focus and the temp gauge recently started to rise and fall as I was driving. It did that for a couple of days then started to stay showing high temps. I replaced the thermostat but the problem is still there. Also, today the transmission started to shudder/feel bogged down after driving for about 5 minutes.

I did some research and it might be the cylinder head temp sensor, but I have no idea where that would be on the engine.

Any idea if that might be the problem or if it may be something else altogether?

Note: the motor never smells hot and all the fluids are at the right levels. The transmission only acts up when the temp gauge rises.


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Old 05-27-2019, 06:49 PM   #2
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Originally Posted by JoeGrady713 View Post
I have a 2010 Focus and the temp gauge recently started to rise and fall as I was driving. It did that for a couple of days then started to stay showing high temps. I replaced the thermostat but the problem is still there. Also, today the transmission started to shudder/feel bogged down after driving for about 5 minutes.

I did some research and it might be the cylinder head temp sensor, but I have no idea where that would be on the engine.

Any idea if that might be the problem or if it may be something else altogether?

Note: the motor never smells hot and all the fluids are at the right levels. The transmission only acts up when the temp gauge rises.
You have to bleed the cooling system when you change the thermostat (or open the system.)
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Old 05-29-2019, 01:18 AM   #3
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You have to bleed the cooling system when you change the thermostat (or open the system.)
LOL. more like get rid of the air pocket that can exist when you open the system. easiest way to remove the air pocket is to turn on the heater full blast and let the car run for a hour or so idling. the car may want more coolant afterwards in your overflow tank. keep tabs on where the overflow tank level is before you start it idling.
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