I hate modern cars...

mcnoople said

I don't think you can run a 2.4 without the radiator cap if it is one of the engines with the cap on the motor and not on the radiator. The 2.4 is a absolute coolant pumping volcano style mess when it opens the thermostat which is right under the radiator cap.

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True, I pulled the lower pressure gasket on the cap to relieve the pressure to the hose and when I revved it, I got krakatoa in my overflow tank. Violent bubbles that would surely pump all the water out post haste. Off to the wreckers....in the mommyvan. I'd buy new but I need it by 0900 today....and all the parts places are special order.