My coolant buzzer plug on top of my radiator has eroded/broke away leaving a small hole, when i turn the car off, about 1/2 a cup of coolant bubbles out the hole. ive only had this hole for a few weeks and will be gettin it replaced but am just wondering if its doing any harm?? i check the coolant everyday and fill it everyday, it hasnt over heated.
but just want to make sure nothings getting damaged.
cheers

 

Shouldn't damage anything,just keep an eye on coolant level since the low coolant sensor is now missing Try to cover the hole with something so you don't get any dirt or crap in there.