You hear it mentioned because it's almost always the cure for the problem you described. I have no idea why but mine needs this every year or so. Plus, if there are air pockets in the system then you don't have as much coolant as you think. So be prepared to add coolant once you burp the system. Plus, some coolant usually spills out during this process so be prepared for a bit of a mess as well. Here's the process posted from an earlier post about this:staynlean wrote:
How do I do the burp deal? I've heard that mentioned a lot on here it seems.