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Old Sep 21, 2021 | 06:44 AM
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Default Cooling system question

Hello all again;
after 20 years of maintenance my stock radiator gave up the ghost. I have a new radiator, New water pump, New radiator cap, New 187°F thermostat, and for the hell of it a new block water temperature sensor. I have an accurate aftermarket water temperature gauge a new sensor going into the block around the number 8 cylinder. Here is my question:
when driving on the freeway my water temperature is now 179° to 184°. In traffic, it ranges from 184 to a high of 190. This to me means that most of the time, the thermostat is staying closed not allowing water circulation from radiator to block. Is this situation good or bad?
any comments would be greatfully appreciated.
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Old Sep 21, 2021 | 10:07 AM
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Your cooling system is functioning perfectly, keep in mind a thermostats rated opening temp is very close, not exact.

Last edited by speedfreak440; Sep 21, 2021 at 10:08 AM. Reason: better language to convey meaning
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Old Sep 21, 2021 | 11:14 AM
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^^^ that.
Thermostats don't 'all of a sudden' pop open at a rated temperature, it's a gradual opening to the rated temperature.
Take a 210 F thermostat and put it in a pot of water and start heating it, you can watch the thermostat opening long before the water starts boiling.
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Old Sep 21, 2021 | 11:20 AM
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So then you gentlemen are saying that it is possible it is slowly opening even at 182°F?
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Old Sep 22, 2021 | 12:43 PM
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Originally Posted by SteveC
So then you gentlemen are saying that it is possible it is slowly opening even at 182°F?

Yes, Enjoy the car you may have things to worry about but cooling system isn't one of them
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Old Sep 22, 2021 | 02:04 PM
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Thank you all for the input have a great day 😀
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