i need to change my O ring and was just wondering what should i expect from this? as in any common problems or how long it will take
Agreed. If you've noticed that your main t-stat o-ring needs replacing, you might be better off getting the entire housing w/ the new ring. These will tend to deteriorate over time because of the combination of wear and tear plus the SVT's valvecover barfing oil over the top of it. Petroleum oil breaks down the material that the o-ring is made of.
http://www.focushacks.com/index.php?modid=50The cooling system will get air in it after doing this correct? How difficult is it to bleed the air of the system
Whats da price on those??? Miiiike?!?! [paranoid]you might be better off getting the entire housing w/ the new ring