When I got the car, the coolant was a little dirty but it was dexcool. I've only had the car 2 months.
I'm using Dexcool and it's as orange as it should be, with no sludge anywhere. What would symptoms of a bad water pump thats not leaking be? I have no overheating issues.
Right, it seems like air getting in would cause the coolant to drop when I remove the cap, not rise. Once I put the cap back on and do a cold startup, the coolant then returns to it's correct level. I'm leaning towards doing a chemical flush tomorrow.