Hello, I've been hearing a strange rattling/crackling noise coming from my engine. It only lasts for a couple seconds as soon as I start the car and then goes away. It aslo only happens during a cold start; if I've left my car sitting for at least a day or so. The sound also went away for a while when the weather was really hot and humid, but came back once it started to cool down. I recorded a sound clip of the noise I'm talking about; hopefully it's clear enough to hear:
http://media.putfile.com/240sx-Cold-Start-Rattle
The car is a completely stock 1995 SE with about 110k miles. Any help identifying this sound would be appreciated. Thanks
