Heat sinks are to absorb heat and then radiate away from the "chip" underneath.
The fact that they are hot, is a good sign that they are working properly. Assuming you haven't messed with the voltage of the chip beneath the heat sink, then all is as it should be.
Do this, to make it easier for us to advise you.
Get SPECCY here: http://www.piriform.com/speccy/download ...get the
FREE version from the:
Piriform Link ...Speccy is a really nice system hardware/temperature, information Utility.
...simply install it...and run the program...then post a screen shot of the main page of the program, when posting a problem/question on these forums.