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Any way to reduce high pitch whine on MCP350?

post #1 of 55
Thread Starter 
I have 2 of these, both of them have a high pitched whine, when running solo, or duo.

They're sitting in a Koolance 402x2. Is there some mod I can do to remove/reduce the high pitched noise they set off?

I bought them new, off a seller here.
post #2 of 55
Buy a new pump and send me the 350. LOL.

umm Try to see if maybe the pump is vibrating against the case. see if detaching the pump and holding it in your hand helps.
post #3 of 55
Thread Starter 
I've tried pushing them inwards, applying different pressure points .. and they still have a high pitched noise.

Give me $70 for them both and they're yours .

It's an electrical noise it sounds like, so I figured there's something I could do?
post #4 of 55
Quote:
Originally Posted by vivithemage View Post
I've tried pushing them inwards, applying different pressure points .. and they still have a high pitched noise.

Give me $70 for them both and they're yours .

It's an electrical noise it sounds like, so I figured there's something I could do?
are they running at full voltage? maybe they are whining because of being run on low voltage?
post #5 of 55
Thread Starter 
full voltage baby.

12v + ground.
post #6 of 55
my 350 doesnt do it, but mine is modded (moved the intake to the top of the pump so i could mount it sideways on velcro)
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post #7 of 55
Thread Starter 
yeah, i've also tried moving them around, running them horiz/vert.
post #8 of 55
Quote:
Originally Posted by vivithemage View Post
yeah, i've also tried moving them around, running them horiz/vert.
could be something to do with water flow? i gave mine a 1/2 intake when it got modded, hasnt whined since i did it, on its stock barb it whined like my grandma lol
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post #9 of 55
Thread Starter 
I am using a 1/2" compression with 1/2" tubing, so that can't be it.
post #10 of 55
Did you buy the black top 350s?
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Overclock.net › Forums › Cooling › Water Cooling › Any way to reduce high pitch whine on MCP350?