Yesterday I had a small puddle of coolant under the rear passenger side of car. It had dripped onto the exhaust and then the floor. Called PA and the guy checked it all out and could not find any leaks just evidence of coolant dripping from the drain around the cap. He pressure tested the system and all was OK. The cap seemed to be secure when I checked so wondered if anyone else had any similar experiences? Could the seal on the cap be failing?