Tom Webber wrote:

Hi Paul,  Here's my first shot at measuring the impeller to housing tolerance.  I use a plastic
clay.  Jewelers us it to make molds and models.  I pressed the cartridge into the soft material
then used calipers to measure the thickness remaining.  Kinda like plastic gage (sort of).
Anyway the measurement I got was Max of .060 and Min of .057.  I did not torque it down so will be
some less.  Although that's a pretty big gap.  If you would like this done a different way let me
know.  I'm always willing to assist.

Tom Webber

Thanks Tom.  Good work. I'll see if I can machine the new water pump housing to a
smaller gap. That should pump more water at the same RPM. Or the same water
at lower RPM and HP consumption.

Paul Lamar
 
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