So a few days ago i discovered a small coolant leak on the lower radiator hose. Today i went to replace the hose when i discovered a potentially much bigger problem. At the very top of the radiator (black piece on top) there looks to be a hairline crack. It appears to have leaked a little and i can hear what sounds like the pressure pushing through the crack. So my question, is this piece connected to the radiator to the point where i have to replace the entire unit? Is there a chance it still is just the lower hose?
I had to drive the car for approx. 25 miles after i discovered the leak, it was not overheating until just today when i had to run and get the replacement hose (wish i had another car to drive). Could this have started with a lower hose problem and because of the overheating caused the radiator to crack?
Sorry for all the questions, my knowledge hasnt expanded to radiator problems yet.