The lower water pump screw is stainless steel with a copper washer only.(It
is also a drain screw). The others are plated steel with spring washers.
Details in maintenance manual!!!!
Nigel Beale
----------
> From: Gerry Holland <gnh@ddsc.demon.co.uk>
> Cc: dgh@liverpool.ac.uk
> Subject: Water pump
> Date: Monday, June 14, 1999 10:18 PM
>
> Question forwarded from David Hillam.
>
>
> ------- Forwarded message follows -------
> Has anyone experienced problems with water leak from the
> pump?
>
> After altering the position of the pump outlets according
> to the manual (difficult, but that is another story) I
> refitted the pump and continued to fit engine to fuselage.
> Before I got any further I heard about the stator
> replacement, removed the engine and transported it to
> Kirkbymoorside. On return I found a few drops of coolant
> under the pump. It appeared that the disturbance of
> transport had shifted coolant, left in some part of the
> system after being factory tested, down to the water
> pump.
>
> Investigation showed that it appeared to come from the
> bottom retaining bolt which I re-assembled with the
> original copper and spring washers. Tightening the bolt
> had no effect on curing the leak. On removing the pump
> housing again, I found that there is a channel in it which
> communicates with the hole for the bottom bolt. Therefore
> coolant can pass along the hole with the bolt and through
> the gap in the spring washer, ie by-passing the gasket.
>
> 1. Have I mysteriously acquired an extra spring washer
> that shouldn't be there (there are none missing from the
> other 6 bolts)?
>
> 2. Should I simply refit with the copper washer only and
> seal with Duralac?
>
> 3. How do I test for leaks before refitting the engine,
> bearing in mind that any leak from the area must be almost
> impossible to cure without removing the engine again?
>
> Has anyone experienced similar problems?
>
> Thanks for any help.
>
> ----------------------
> David Hillam Kit 113 G-SHSH
>
> dgh@liverpool.ac.uk
>
>
>
> *** PLEASE NOTE THE CHANGE OF DIRECT PHONE AND FAX NUMBER ***
>
> Gerry Holland Direct Line : 07071
227887
> IntraNet Solutions Inc Switchboard : 01753
701072
> Strategic Business Manager EMEA Operations Direct Fax : 01761
432472
> The Nova Building, Herschel Street Mobile : 07808
402404
> Slough, Berks. SL1 1XS
>
> mailto:gerry.holland@intranetsol.com
>
> Corporate Web Site : http://www.intranetsol.com
> UK & Europe Web Site : http://www.intranetsol.co.uk
>
|