Hello,
Please note that if you have a bad radiator cap it will allow coolant to escape through the overflow tube.
https://www.2carpros.com/articles/coolant-leak-symptoms
This will happen if the radiator cap is unable to hold the correct pressure. When the coolant leak due to a radiator cap, it will drained through the overflow tube, typically while you are driving at operating temperature and might not leave any mark inside the engine bay.
Perform a pressure test on the cooling system. This will simulate the pressure of the cooling system at operating temperature. It can make finding leak easier.
https://www.2carpros.com/articles/radiator-pressure-test
Please let me know of any questions.
Thank you.
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Tuesday, August 31st, 2021 AT 11:57 AM