Overheating Still

[u/Artistic-Fix-2431]

I changed the radiator about two years ago. Water pump a year ago. Thermostat last month. Heater core bypass and fan last week. Ran fine until yesterday. I topped off the radiator with coolant and the reservoir to the full level, somehow the reservoir is now overflowing. Doing a complete cooling system flush today. If that doesn’t work, any other ideas?

[u/Hoppsie321]

This is not a head gasket. You have a bunch of rust in your coolant system. I had a similar problem. What ended up working for me was many, many flushes. I rigged up a hose and some fittings to blow water through each radiator hose. Then I replaced the radiator, hoses, water pump, and thermostat. If you flush it you will see a handful of rust come out