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Maybe rust blocking radiator. Pull the radiator pipe off the bottom and flush it. Otherwise might have minor gasket blown. Hot gasses heats the water up. Use antifreeze (gives water a higher boiling point so makes driving a bit safer on the engine (wont seize if water is not boiling))
if no air in the system from internal heater or other places
new thermostat and radiator cap
good firm coolant hoses
old school air bleed you fill coolant system with motor running
heater on in the car and thermostat open burp the hoses until bubbles are no more
if still no better
what about these possibles
faulty coolant temp sender
head gasket failed
clogged radiator
cooling fans not spinning fast enough
or not coming on soon enough
How old is the fluid, old fluid could boil at a lower temp. The cap could be bad, if it isn't sealing up correctly at the right pressure, coolant could blow by. The radiator could be clogged. The thermostat could be bad, test it by using an old pot and boiling it in water to see if it opens up.
CHECK YOUR COOLANT FAN AND MAKE SURE WHEN YOU ARE AT OPERATING TEMPERATURE THE YOU CAN HEAR IT . AND ALSO CHECK TO SEE IF YOUR THERMASTAT IS STICKING CHECK AND MAKE SURE AT OPERATING TEMPERATURE THAT YOUR UPPER RAD. HOSE AND LOWER RADIATOR HOSE ARE ABOUT THE SAME . MAKE SURE ONE IS NOT COOL AND THE OTHER HOT IF SO THERMASTAT . AND CHECK COOLANT LEVEL. I WOULD START THERE
hi,first thing to change IS the thermostat,they are cheap enough,follow the top hose from the rad back to the engine you will see a dome shape cover,remove and replace.....
You have a blown gasket and are experiencing what is termed Blow by...
Blow by is where the engines compression is released into the coolent due to a faulty head gasket.
Don't know what you are testing by squeezing things but if lower hose is cold ant upper is hot, change the t stat. If problem continues then it's likely that the radiator is still obstructed and needs to be replaced (sometimes flushing will simply go around internal stoppage).
Find where the Upper Radiator hose connects to the block. That is usually where you find the Thermastat. 2 to 3 bolts hold the cover in place. You need new Therma stat, a new seal, and the tools to remove and install the part.
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