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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Old 03-25-2010
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Question on waterpumps

Why don't they make the waterpump cover in some plexi or lexan, so that we - boaters - could check the vulnerable impeller without removing the damn cover?

Would plexi/lexan get black stained by the rubber impeller rubbing against it?

Or would some other material be usefull here?

Thx for your reply
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Because waterpump manufacturers don't care how easy the pump is to service...as they're not servicing it. Acrylic and polycarbonate are probably less abrasion resistant than the plastic currently used, which I believe is a form of ABS. ABS can not be made in a clear form as far as I know.
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Old 03-25-2010
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is there any clear plastic wich would suitable for the job?
One could easily make one him/her-self...
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Having a clear plastic cover through which you could look will usually do nothing more than provide you with a false sense of security. Most problems with impellers cannot be seen by simply looking straight-on at the edge except perhaps a severely torn up blade. It can't replace the thorough inspection of the entire surface of all blades, can't allow detection of cracks and deformation in the blades, can't ensure the hub isn't separated, can't determine scoring of the housing, etc...



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Old 03-25-2010
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He doesn't want facts to get in his way....

Quote:
Originally Posted by k1vsk View Post
Having a clear plastic cover through which you could look will usually do nothing more than provide you with a false sense of security. Most problems with impellers cannot be seen by simply looking straight-on at the edge except perhaps a severely torn up blade. It can't replace the thorough inspection of the entire surface of all blades, can't allow detection of cracks and deformation in the blades, can't ensure the hub isn't separated, can't determine scoring of the housing, etc...
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Old 03-26-2010
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Yeah well, you could see: missing blades, worn out blades, dirt,...
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Quote:
Originally Posted by bartvdv View Post
Yeah well, you could see: missing blades, worn out blades, dirt,...
You may but my point is there are other more insidious issues with impeller blades such as a worn or loose hub , cracks, etc which cannot be seen by simply looking at it's side.

Facts apparently don't interfere with Saildogs opinion
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