I had a major overhaul on my cooling system on my Blazer. i had a new Water Pump, Fan Clutch, Radiator, Thermostat,Cap All Put In. I Noticed my Antifreeze is starting to turn a brown Rusty Color. Im Not Sure If Its just a dirty cooling system or a Head Gasket. My Oil Level is Fine. What Are some signs of a Head Starting to Go. My Other Possibility is that My heater core has alot of the slude and rust still in it, circultaing around the system bc i didnt change that. im hoping that when i flush it in march it will all clear up. any input is apprciatedthanks

 

Most likely is left over junk from when you had a compromised cooling system. A full system flush should help.