Hey guys, lately my Danger Den DDC pump w/acrylic top has started making a loud irritating buzzing noise. I initially thought it was one of the fans, but am now about 98.5% sure it's the pump. Before I go dismantling anything, I thought I'd see if anyone had any thoughts on possible cause.
my own theories - I'm using Feser 1 black UV coolant, could be that it's gooped up a bit in the pump and unbalanced the little wheel that spins around and circulates the fluid. Solution would be to replace coolant with water?
could be the acrylic top is screwed on too tightly? I don't really see how that could cause it to buzz, but ya never know...
could be the way I have the pump mounted, it could be vibrating more than if I mounted it on a solid flat surface. Solution would be to dismantle the mount it's on, re-do the hoses and screw it down to a flat surface (see pic for current mounting). I don't *really* think this is the cause, as it's been mounted this way since May 2010 and it only started buzzing in the last month or so. And, I've gripped the pump while it's running, and this doesn't seem to affect the buzzing noise much (although twisting its mount slightly does seem to lessen the buzzing).