I was trying to find the VIN# on my engine when I noticed something very odd and disturbing. There is a small part to the front of the engine and it says "TOP" on it, under that part there is a blob of coolant. It is like bubbly and close to the hose that goes from the radiator to the engine. I wish I could take a picture of it but I don't have a digital camera or a scanner. Could anyone please tell me what this means. By the way, I am leaking coolant at the moment, due the common crack in the upper radiator rank. Thanks in advance.