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At what temperature does the coolant fan turn on?

Tiny
YAZIDAN
  • MEMBER
  • 2007 TOYOTA COROLLA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
I am planning to replace the water pump. I am wondering at what temperature of the coolant should my cooling fan comes on?
Friday, August 30th, 2024 AT 5:27 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

The engine cooling fan should turn on at approximately 200°F. +/- 5°F. I attached a picture below indicating that temperature. Note that it indicates above 199°.

Let me know if this helps or if you have any questions about the water pump replacement. Here is a link that explains in general how it is done. If you need specifics, let me know.

https://www.2carpros.com/articles/water-pump-replacement

Take care,

Joe

See pic below.
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Friday, August 30th, 2024 AT 9:50 PM
Tiny
YAZIDAN
  • MEMBER
  • 107 POSTS
I checked it yesterday. In my car the fan comes on when the temperature is at 205. Is it okay?
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Saturday, August 31st, 2024 AT 5:29 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

Yes, that is perfect as far as I'm concerned. The actual thermostat in the cooling system doesn't fully open until the coolant temperature reaches 195°F. So, 205°F makes sense to me.

Let me know if you have other questions.

Take care,

Joe
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Saturday, August 31st, 2024 AT 6:27 PM
Tiny
YAZIDAN
  • MEMBER
  • 107 POSTS
Just let you know water pump and thermostat done. Thank you
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Saturday, August 31st, 2024 AT 7:21 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

No problem whatsoever. Take care of yourself and feel free to come back anytime in the future.

Joe
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Sunday, September 1st, 2024 AT 7:58 PM

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