Unusual Laing DDC-1T Ultra Pump Noise

[Deshman]

Like the title says, there's a strange noise coming from my pump. At first I thought it was a HDD problem as it sounds quite similar to the noise my Seagates make when you load; that quiet, low but quick, repeated, random arm-seeking noise.

After disconnecting all the HDDs in my PC I confusedly narrowed it down to the pump. Turn off the pump, the noise stops. The res is almost full (400/500ml) and after searching the loop I can't see any signs of an air bubble. According to my fan monitor the pump is running at between 4500-4600 RPM.

Am I being too over critical here or is something going seriously wrong?

 

[Marcus]

What top are you running on the pump, XSPC?

 

[Deshman]

XSPC Delta apparently, yes. It was my first pump so I got it sent pre-built.

 

[Marcus]

I've heard of this problem a couple of times recently, see here:

http://www.watercoolinguk.co.uk/forums/viewtopic.php?f=24&t=4240

 

[Deshman]

Thanks that was a great help Released each corner screw by 1-1.5 turns and the noise has nearly entirely gone - to hear it you have to put your ear next to it and even then it's very feint.

Still can't help the feeling that I've left myself open to a leak though.