Keeps Overheating?

2002 CHEVROLET CAVALIER
275,876 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
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TINAMCABEE
  • MEMBER
  • 1 POST
I have replaced the water pump, thermostat, radiator, radiator hoses, plugs, wires, changed oil, flushed radiator, and hoses, and replaced coolant fan. Still overheating and now heater is blowing cold air. Why is it overheating?
Jun 16, 2023 at 9:06 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

If the heater isn't working, chances are it is low on coolant or there is an air lock in the system preventing coolant from reaching the heater core.

It sounds like you have done everything possible. Have you checked for a failed head gasket? Do me a favor, take a look through this link, and check what you are comfortable with:

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

In addition, let me know if the vehicle overheats at highway speeds and if the cooling fan is working.

Take care,

Joe
Jun 16, 2023 at 1:53 PM
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