3.0 GLP-E water leak... I made a pump tester

Joined
Feb 28, 2009
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I have a water leak somewhere in the lower area of my serpentine belt (I can tell by the way it flings water off the belt in that area) and I was suspicious that it was my raw water pump, but now I'm not so sure.

I took it off and tried to build a tester for it. I basically plugged the outlet with clear tubing with a PVC plug in the end, then clamped the hose into the inlet with another piece of clear tubing and turned the water on to see if there were any leaks.

I first did it without the impeller in there and couldn't find any leaks, even when I spun the pulley. Then I put the impeller back in, cranked the water pressure on again and still couldn't find any leaks, even while I was turning the pulley. I might get the drill out and a fan belt so that I can spin the pulley faster later, but for now I was satisfied that it might be something else leaking in there.

So do you pros think that the 40psi coming out of the garden hose is sufficient pressure to replicate the conditions it would normally operate at? I figured it would exceed the normal operating pressure this thing pushes out normally, but what do I know.

I know my system's not fool proof, but I figured I'd ask for anybody else's advice on what else I can do to check the pump. I figured the pressure test would be pretty reliable. Purchasing a new one is almost $400. That's an expensive guess.

IMG_20110111_203003.jpgIMG_20110112_142728.jpgIMG_20110112_142648.jpgIMG_20110112_142643.jpgIMG_20110112_142631.jpg
 

Bondo

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Re: 3.0 GLP-E water leak... I made a pump tester

Ayuh,... Put the raw water pump back together,.. With a new impeller...
40psi is Way higher than normal pressures...

My guess is, the Circulating pump seal is going...
 

zbnutcase

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Re: 3.0 GLP-E water leak... I made a pump tester

I second the circ pump theroy
 
Joined
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Re: 3.0 GLP-E water leak... I made a pump tester

Are y'all referring to the mounting gasket or the internal shaft seal on the circ pump?

I've included a pic. Thanks again...

circ pump.jpg
 

EddiePetty

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Re: 3.0 GLP-E water leak... I made a pump tester

...there should be a 'weep hole' in the bearing housing on the underside of the circ pump, partially hidden by the pulley. Most likely that is your water source resultant from a failed/failing seal/bearing.
 

BeaufortTJustice

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Re: 3.0 GLP-E water leak... I made a pump tester

I don't think this would be considered a hijack because it continues and brings a conclusion to the original thread, but...

I noticed exact same thing upon firing my boat up today. I see above that it is most likely a seal in or around the circulating pump. Can someone recommend the steps to take to repair issue? Is it usually sufficient to just replace said seal? What is the "technical name" of the seal, so I know what to ask for at the parts place? Is the seal failure indicative of another, more serious issue, or does it simply have a finite lifespan and fails over time no matter what?

If this considered hijacking, I apologize and please feel free to move this to its own thread. I won't take offense.
 

Bondo

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Re: 3.0 GLP-E water leak... I made a pump tester

Can someone recommend the steps to take to repair issue?

Ayuh,... Replace the circulating waterpump...

It's a Non-servicable part....
 
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