What's the deal with radiator caps?

[Dave535Phoenix]

Mine says 200 - seems to have worked okay up until now, but I've seen 240 and 280 mentioned, and something about a recall.

Someone with a good memory or kind streak post some info or a link.

I'm lazy today...

Dave

[DallasBill]

TSB #170198, FEB 01, Recall - Radiator Cap Replacement

I do not know what the pressure numbers were, but if you go to a dealer they can tell you right away via your VIN if your was done or not.