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Overheats when accelerating

Chevrolet Optra 2007  177000 miles
One day, the air compressor suddenly stopped working. When I noticed that the temperature was almost in hot, I stopped, turned off the engine and waited. However, when returning home, the vehicle overheated again. The following day, I changed the thermostat but the failure is still there, it warms up more than it should. The fans are working full time and it is when accelerating on long roads that the vehicle overheats, not when I am stopped. I personally believe it is the pump that is failing but do not know how to check it. Hope you can help me.
bertie from United States 9 years ago  
BE
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Best answer (according to bertie)
emmie from United States 9 years ago
Check the water pump, its impeller might be worn. Clean the radiator as well.
bertie from United States 9 years ago
You were right, emmie. The mechanic checked it and told me it the water pump was damaged, the impeller was released and almost broke the belt. He replaced it and the problem was solved. Thank you.
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