it started with a clicky sound, much like a hard drive on the blink.
I also noticed the noise got louder as my mac got warmer. so with the help of ifixit i took my mac apart and removed the fans. One was stuck and the other was sticking.
I ordered new fans from ifixit which came a week later.
the repair went very well, i followed the Ifixit guide and put the mac back together, wow silence, I am so pleased with it and with Ifixit.
My advice to anyone is use Ifixit makes the job so easy, i changed my hard drive on my 8 year old iMac using the guide that was easy too and Make sure you have the right tools for the job.
Thanks Everyone at Ifixit.