Heat expands the liquid and comes out of the system. You either have a thermostat not opening, a water pump not operating, or your system is backed up. Start with the thermostat, if it's good, flush the system and check the flow. The radiator should flow freely. If all else fails, replace the pump.
SOURCE: car overheating
you have to change your Heater Core. Your Antifreeze moves in a circular motion from Radiator to Thermostat through engine to your heater core back to your radiator. If there is no circulation, your engine is going to overheat. I had the same problem with my Pontiac Grand Prix.
SOURCE: My car is leaking antifreeze onto the ground under
If your coolant light turn on sometimes, and you can check that your coolant level is low, definitly you have a leak.
I suggest check this artricle about how to detecting coolant leak
Hope this help (remember rated and comment this).
SOURCE: Have 2002 Ford Escape, Where's the Radiator Cap??
This is where you fluid goes. If I were you, I would stay away from those sealants. But yes you can put the sealant in the reserve, but it;s best if you drain half the water out, pour in coolant and then re-fill. This gives it a better chance to flow throughout the system. Sometimes these sealants can cause more harm than good in the long run.
SOURCE: overheating coolant boiling out into reserve tank
you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...
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