5S-FE MK2 Non-Turbo Engine Coolant problem please help

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Hi everyone, I am new to the Forum and new to the MR2 models. I recently bought a Non Turbo 91 MR2. I drove two hours away from home to acquire this car. I drove the car back home with no problem until i got to my street and then it started overheating. I researched around for possible issues, I narrowed down to the coolant not being bled. I asked the previous owner about the overheating issue and he said he just finished flushing the coolant before he stop driving it. So i searched how to