Hello, I'm Danny.
Here is the information you requested. I don't think this issue is being caused by bad coolant rather a thermostat issue. It's possible the thermostat is faulty-or stuck closed therefore not allowing the coolant to circulate through the engine and heater. Here are two tutorials showing how to replace an thermostat and change, flush the coolant:
https://www.2carpros.com/articles/how-an-engine-thermostat-works
https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars
I've attached picture steps below on how to change the thermostat on your car. I've also included a picture below of the type of coolant to use and your cars capacity requirement. Hope this helps and thanks for using 2CarPros.
Images (Click to enlarge)
Dec 17, 2020 at 6:39 PM
