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Fans turn on but temperature gauge reads low temperature

Tiny
DONKDOGS84
  • MEMBER
  • 1971 CHEVROLET CAPRICE
  • 5.7L
  • 9,000 MILES
My car listed above 350sbc has a electric fans upgrade.I also have a Dakota digital dash and the atomic EFI MSD setup. It has a 180 thermostat in it.I noticed it was running at between 120 and 140 temperature wise and my thermostat never would open. My fans were set to kick on at 180 but they would kick on around 140. Now I change my coolant sensor too.I adjust the fans to turn on at 230 to see what would happen and now it’s getting to about 180 and the thermostat opens. But what’s really going here does? Someone know the answer?
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Sunday, October 27th, 2019 AT 8:01 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Hello,

I would get an infrared temperature gun to see if the temperature is really what the gauge says. because it sounds like the sender or gauge, could be off.

Here is a link to help show you:

https://www.2carpros.com/articles/how-to-use-an-infrared-temperature-meter

Please run down this guide and report back.
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Tuesday, October 29th, 2019 AT 11:01 AM

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