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The water in the car radiator was boiling. KIA SORENTO 3.5 2004

282 views 3 replies 3 participants last post by  super20  
#1 ·
Hello everyone, any help would be appreciated
yesterday, returning from work (10 kilometers away), when I pulled into the garage and turned off the engine, I heard the water boiling.
I let it cool down and today I checked for any leaks, whether the thermostat is opening, whether the water pump is working, whether it needs to be topped up with coolant, and everything is fine. I also let the car run on its own at idle, checking the temperatures. Everything is fine.
What could be the cause of yesterday's water boiling?

Thank you in advance
and sorry for my perhaps not-so-good English
 
#2 ·
I really don't know, but some things to consider - ambient temps, car sitting in (heat?) all day, airlock(s) in the system that cleared themselves o/night.