My vehicle is a 1999 Saturn SC2 with a coolant capacity of 7 liters.
I attempted to start flushing my coolant before changing the water pump. I drained the coolant from the bottom of the radiation. Then I closed peatcock(spelling?)petcock and put in some radiator flush and cleaner into the reservoir then topped it off with distilled water. I now realize that I don't think I drained all of the coolant since I only put in about half a gallon of fluid. I can't remove the thermostat because the bolts got stripped when I changed it a few months ago. I noticed a build up of some sort of mineral solid when I replaced the thermostat so that is when I figured a coolant flush would be good. How can I fix any possible problems I may have caused? How do I get the coolant back to the proper concentration?
I was letting the car run and was monitoring the reservoir level to add more water when I noticed that the reservoir was bubbling. I quickly turned it off, any help is appreciated. I had checked it at about 5 minutes and the reservoir had dropped a tad, at ten minutes and it dropped a bit more then at 20 minutes was when it was boiling.
The reservoir was about empty and it took 1/3 of a gallon of distilled water to fill up.