![Image](http://i74.photobucket.com/albums/i253/iancav6/e77efe12-a3cf-46f6-b44b-57ac110df67b_zps5ab4f429.jpg)
These are cam caps,4 per cam on the V6.The arrow is pointing to the front bank inlet cap with a seal clamped underneath it.
With all due respect,if you are unsure of what a cam cap is, this probably isn't a job you should tackle without help.When doing a belt change you can use a timing kit to lock the cams in place and is "relatively" straight forward.To change the seals means removing the pulleys and of course this means the locking pieces have to come out so making the chance of getting the cam timing wrong much greater.
If you haven't already, buy an Omega Haynes manual,they are basically the same as far as belt changes are concerned.