Hi guys it my first post. So recently my car been overheating and it had boiling coolant, it sometimes it ate it or evaporated. i change the rad cap and it stop and i had the car running on water instead on coolant until today but as soon i change it into 50/50 coolant and antifreeze it started over heating again. Ive done the block test and they come out negative. Ive also change the thermostat too. Idk what going on. Can someone please help me out please
