Overheating reservoir boiling?

2005 CHRYSLER PT CRUISER
1,200,000 MILES • 2.2L • 4 CYL • AUTOMATIC
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DEBBIE ESPINOSA
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Replaced the thermostat and housing, still hot. So, I did a flush, still boiling hot. I thought maybe a gasket leak and so did blue glass. Still overheating not boiling but temperature going to red. Also replaced air temperature sensor and also replaced the coolant temperature sensor.
Sep 24, 2022 at 8:55 AM
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SQM
  • ✓Experienced Mechanic
  • 6,383 POSTS
Hello,

An engine can overheat due to a number of reasons. You have already covered the thermostat and temperature sensor. It could also be due to a faulty water pump, clog in the coolant system, bad radiator, inoperative cooling fans.
Was there coolant mixed with oil?

Take a look at this guide, it goes over the usual issues and diagnostics:

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Let me know what you find.
Thank you.
Sep 24, 2022 at 11:12 AM
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