Well I was changing the spark plugs today and found coolant in one cylinder. It's on the driver's side, second cylinder moving front to back. None of the other cylinders had coolant in them. My oil does not look milky, and there is no sign of white smoke from the exhaust. I DO have the plastic crossover on the intake. Do you think this is a cracked intake or something more serious? My car does not overheat. However, the other day I filled the coolant reservoir with about a cup of water because it was a little low. I dried the cylinder, replaced with a new spark plug and drove the car 10 miles. As of now, the cylinder is still dry. Any thoughts???