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gpcola · 01-25-2006, 02:16 PM

Well essentially yes; I enlarged the mounting holes slightly and inserted rubber grommets through which I have some M8 bolts. The pump and rad are mounted in a plywood radbox of sorts - its more of a cradle right now to be honest as it still lacks side panels

I don't think vibration is the problem because even holding the pump in my hand it makes just as much noise and at any rate the pump is so tightly bolted down that it cannot move at all. The radbox itself has felt feet applied so any vibration through the box is not being transmitted to the floor tiles.

This is a second hand pump so I guess it's possible that the noise is due to wear in the impellor bearings. Are these pumps normally quiet?

01-25-2006, 02:16 PM	#3
gpcola Cooling Neophyte Join Date: Aug 2005 Location: Rome, Italy Posts: 4	Re: Varying pump speed possible? Well essentially yes; I enlarged the mounting holes slightly and inserted rubber grommets through which I have some M8 bolts. The pump and rad are mounted in a plywood radbox of sorts - its more of a cradle right now to be honest as it still lacks side panels I don't think vibration is the problem because even holding the pump in my hand it makes just as much noise and at any rate the pump is so tightly bolted down that it cannot move at all. The radbox itself has felt feet applied so any vibration through the box is not being transmitted to the floor tiles. This is a second hand pump so I guess it's possible that the noise is due to wear in the impellor bearings. Are these pumps normally quiet?