Strange H60 pump problem

Jimbob1

Distinguished
Jan 22, 2013
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Around a week ago I started getting a rattling noise, sounding like a old hard drive from my H60. When I tilt my PC 3-4 Inches on the side the noise completely goes. Now, I'm suspecting some air has got trapped inside and that is causing the noise.

I'm not too sure how to fix it?