97 GP se rattling noise

I just got a 1997 Grand Prix SE. It runs like a top but when you start it (crank it) == it makes a rattling noise.
This is the only time that you hear the noise - you can even tell the car is running because it is so quite and idles smooth.
What do you think??

I just got a 1997 Grand Prix SE. It runs like a top but when you start it (crank it) == it makes a rattling noise.
This is the only time that you hear the noise - you can even tell the car is running because it is so quite and idles smooth.
What do you think??

I had the same question about mine, check out this thread for some good info: http://www.automotiveforums.com/vbulletin/showthread.php?t=486125&highlight=cold+clearance