strange noises, sounds like air escaping
yesterday i after i had turned off the engine i was fiddling around the front of the car when i heard an unusual sound. it was air escaping but in little bursts. it sounded exactly like someone dripping cold water onto a hot stove one drip at a time. just like a tap dripping itself dry the noises were fast to begin with but slowed down and then stopped althogether.
i turned on the engine and tried to repeat the sound to get an idea of where it came from but those clever little gremlins were ready for me and didn't perform.
has anyone any idea what this might be?
thanking you in advance as always for your help.