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MCP350 Drilling Sound, Leaking, Serious Trouble!

post #1 of 12
Thread Starter 
So, my MCP350 worked when I bit of leak testing yesterday.

Today, I fill my res up, let the water drop down to it, and turn my PSU on. The pump (MCP350) makes a drilling sound, and dies.

I turn the PSU off, turn it back on, and the pump comes back on. Worked like that for a while.

Now though, the pump basically refuses to start. I plug it in, it starts making the drilling sound, and dies. I unplug it, wait a few seconds, plug it back in again, nothing happens. If I wait 2-3 minutes or so (and then plug it in), it works.

Also, it's leaking severely. It's not the barbs, it's from the inside of the pump. (as far as I can tell)

Since I haven't done any modding or anything to this pump, what could be causing the leaks? The four screws are screwed in tight, of course.

While on the topic of barbs... how should I be connecting my tubing to the pump? Do I just plug the tubing in and clamp it down?

Thanks!
    
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post #2 of 12
wait....did you run your pump dry with no water inside?

you could have burned out the pump....the pump requires the water to cool it as well, which could mean you could have melted the plastic inside the pump methinks....and no, I don't think you can claim warranty for that kind of damage

methinks charliehorse needs to get in here to give some proper advice
i'm a bit of a nooob myself
post #3 of 12
Thread Starter 
Haha, no, I'm sure the water was in the pump.

Stupid drilling sound. Gah!
    
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post #4 of 12
Quote:
Originally Posted by dvdhsu View Post
Haha, no, I'm sure the water was in the pump.

Stupid drilling sound. Gah!
hmm

are you using an aftermarket top or the stock top?

why don't you send swiftech an email or call them up when you can and see if you could get it sorted

i've never heard about this before
post #5 of 12
Thread Starter 
Bought it from a seller here on the forums.

Stock top, of course.

As for the condition of it... it's gotten worse. Now when I plug it in, it just jumps a bit and stops. Will not turn on for more than 5 seconds at a time.
    
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post #6 of 12
Contact the seller of course.

Also, when you screwed the stock top on make sure the screws aren't too tight. It could be the impeller hitting the housing.
post #7 of 12
Drilling sounds (I'm no WC guru...jumping into it now, but I work with hydraulic pumps @ work) may be a failed bearing or (not sure if 355's are brushless) worn out brushes. It's quite possible the impeller came loose and damaged the internals hence the leak, or you screwed it too deep and impeller is striking the screws.

How old is this pump again? Almost seems like it was run dry.
post #8 of 12
Well, it's obvious the pump is dead. The question is how and why? My guess is that something inside the pump has come out place. I don't know the terminology, but the pump has moving parts inside, so I'm guessing that either the moving piece itself is damaged, or it's hitting something it's not supposed to. Which explains the drilling sound. [Edit: Moving piece = impeller?]

As for why, I don't know. Dropped the pump recently? How long have you had it - could it have been damaged from mishandling by the courier?
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post #9 of 12
its most likely the oring slipped off and is caught in the center of the pump... or stuck in the inlet not allowing water to get in..
post #10 of 12
Thread Starter 
Yep, sent seller a PM.

I have never dropped the pump, never modded it. I just took it apart to look at the impeller, and everything looks okay. I'll take another look and screw it in looser, and see if that helps.

The O-ring looks okay. I'll take it apart again now and see what I find.

Thanks everybody, +rep all!

Edit: The pump arrived at my doorstep a little less than a month ago. I started setting up my water cooling loop this week.

I believe the pump is from an old Apple G5 machine. According to the seller, it was never used.
Edited by dvdhsu - 12/18/10 at 3:10pm
    
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