noisy refrigerator

Everyonce in awhile (seems to always happen during a very important silent part of a movie) the refrigerator starts to make noice. it sounds as though two things are banging up against each other. I was thinking about taking it apart and insulating the coils or what ever is making the noise, but I'm not sure what to do it with, w/o causing a fire saftey issue.

So it would be a bad idea to try and wrap it in an insulation material like with headers on a car?

I have exaclty what your talking about usualsuspects