no heat/temperature gage high?

2000 SUBARU LEGACY
235,000 MILES • 4 CYL • 4WD • AUTOMATIC
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HOLLYROSS
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While driving the temperature gage went all the way to overheating and hot air turned cold. There is coolant, we changed the temperature gage and thermostat.
Nov 23, 2022 at 11:21 AM
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JACOBANDNICKOLAS
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Hi,

Are the same things happening since the work was completed? With the engine cold, remove the radiator cap (not the overflow) and see if the coolant level is full. If it is, perform the bleed procedure below and let me know if that takes care of the issue. If it is not low, let me know if the original issues are still occurring.

Take care,

Joe

See pics below.
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Nov 24, 2022 at 8:22 PM
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HOLLYROSS
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Sorry, didn't mention before. We already bled the coolant. The problem still exists. Thanks
Nov 26, 2022 at 11:36 AM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Hi,

If you used the aforementioned procedure for bleeding, then something is likely putting air into the cooling system. My first thought is a failing head gasket. Take a look through the link below and let me know if you see anything that mirrors what you see on the vehicle:

https://www.2carpros.com/articles/head-gasket-blown-test

Let me know.

Joe
Nov 26, 2022 at 8:23 PM