Best bet would be to do a pressure check on the cooling system to see if there is a leak. Is there any steam or smoke from the exhaust system? If so, you could have a blown head gasket or crack in head or block.
And 1 other thought... are you sure the thermostat was installed properly? if it is backwards, it would not allow the antifreeze to flow and the engine will overheat.
2003 pt curiser, losing water over a week or so, then over heats. Replaced radiator, thermostat, cap and water pump
2003 Chrysler PT Cruiser Touring Wagon FWD
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I have a 2005 pt cruiser that over heats when its warm/hot outside. The thermometer always goes up to red when we come to a stop but when we are on a high way its a less chance of it over heating. ...
2005 Chrysler PT Cruiser Touring Wagon FWD
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General
changed radiator and water pump in october 2021 it just started boiling
2003 Chrysler PT Cruiser Touring Wagon FWD
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My 2005 pt overheating start off normal after a 30 mins drive it starts to heat up no leaks or no sounds just starts to overheating
2005 Chrysler PT Cruiser Limited Wagon FWD
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Someone changed the heater core in my 2003 pt cruiser and unhooked all the wires and I need someone to help me get it back together or a website to help me
2003 Chrysler PT Cruiser Dream Cruiser 2 Wagon FWD
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