![Not sure what to make of this, this is a coolant tester. Since were in summer is this a good result? What is the yellow ball doing? : r/MechanicAdvice Not sure what to make of this, this is a coolant tester. Since were in summer is this a good result? What is the yellow ball doing? : r/MechanicAdvice](https://preview.redd.it/2y7wzo9e84631.jpg?auto=webp&s=73efe0d225ab29afef47b28513c791dc759f502c)
Not sure what to make of this, this is a coolant tester. Since were in summer is this a good result? What is the yellow ball doing? : r/MechanicAdvice
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