Date:         Fri, 16 Apr 2010 15:03:55 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Busted water pump and an extra nut
Comments: To: Andrew Martin <ramblinvan@GMAIL.COM>
In-Reply-To:  <C7FE8C1820804C18873693801E8280E6@agmnewbox>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 02:08 PM 4/16/2010, Andrew Martin wrote:
>Though I was irrationally hopeful that the new water pump might lower the
>needle position on my temp gauge, it did not.

I'd check the gauge calibration -- the markings are illustrated in
Bentley and the resistances are 265 ohms for "just barely" and 35 for
left edge of the overheat zone, light should be flashing.  Unplug the
sender and connect resistors from there to ground.  Give it a couple
minutes to stabilize for each reading.  In your case if the high
reading is correct then you either have a bad sender or a genuine
hot-running engine.  Poor connections will give a low reading.

Also check that the voltage at the back of the gauge is 10v +/-
0.5.  If it's getting full system voltage then both gauges will run high.

Yours,
David