问：汽车不会启动。起初它过热的问题。然后弹出了一些东西，水出来了。我不知道这怎么了

One day my cars coolant level was low. I went and bought coolant for my car but I’m not sure if it was the right one or if I didn’t mix it well because it’s suppose to take 50/50 and the coolant I got was just pure coolant. Ever since I added the new coolant my car began to over heat a lot. I drove it to work one day and as I arrived at the parking lot something from underneath the car made a popping sound and what seem to look like dirty water began to leak out. I let the car cool at work for 10 hours. I was then able to drive it back home, making a couple of stops along the way, so it wouldn’t over heat. I was able to turn the car on for a couple of days after. Then one day the car had trouble starting, car began to shake and wouldn’t run. Ever since then, my car won’t start. What could be wrong?

My car has 210000 miles.
My car has an automatic transmission.