i can't post a pic but it's the same heatsink that came with the computer back when the temps were lower. i can see it running fast as it always was when the side is off the computer but its still showing high temp.
what kind of temps have u had earlier?
During summer the temps can be quite much higher since the air that is being used to cool the cpu is a lot warmer.
Good attempt at fixing the problem! Dust is one of the major causes of the pc deterioration. Try getting a new heatsink/fan. The Zalman's offer great bang for your buck!