Are you seeing any smoke out of the tailpipe?
Check your oil make sure it is the normal brown color.
Try this: When the engine is cool, open the coolant reservoir cap.
Add coolant to the "Full" mark.
Start the engine, if the coolant level goes down, slowly add coolant.
This way as the coolant will circulate thru the engine and get all the air out.
When the reservoir reaches its "Full" level, wait for a little bit to see if the level goes down. If it does not go down squeeze the radiator hose (be careful not to come in contact with the cooling fan or any other moving or hot object), this will let out any remaining air in the system.
If needed add more coolant. Put the cap back on the reservoir.
Then observe to see if the coolant level goes down again on the next time you drive/start the car.
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Please let me know your findings.
Friday, July 30th, 2021 AT 6:58 PM