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Is the car losing coolant as well? Does the car have a gauge as well as the light that is indicating the temp is high?
I think the next step if the cooling system has been pressure tested is going to be to use a scan tool to see what the actual temp is. You may have a coolant temp sensor malfunctioning. This would explain the light without any coolant actually boiling out. Also, check and make sure that both the fans are coming on. If not, it may be a fan issue causing the engine to get hot.
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A quick test for the fans is to turn on your A/C, both fans should kick on when the compressor kicks on. As for pay, the site takes your money and holds it in your account. I get paid when you click on one of the rating icons.
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