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Hi Patrick
The radiator should not be filled to the top. Fill it only to about an
inch from the top to allow for the water expansion.
This was the norm before expansion tanks were used. My Silverstone ran
this way all through the highs and lows of Italy in 32 deg plus days.
Regards
John Rowe
Perth
On 15-11-2016 4:37 AM, Patrick & Caroline Quinn wrote:
>
> G?day
>
> I know the subject of fitting a coolant expansion bottle has been
> covered before, but this has a twist as it concerns a Healey and not
> an Austin-Healey.
>
> Our Healey Duncan has its original cooling system that is
> unpressurised. It?s assisted by an electric fan in front of the
> radiator, but with our warmer climate it persists is dumping its
> coolant out through the overflow pipe.
>
> The radiator cap is a screw on type and the overflow pipe exits the
> radiator header tank separately in front of the cap. Being
> unpressurised there is nothing to stop the hot and expanded coolant
> from exiting via the overflow pipe.
>
> I am thinking of fitting a coolant expansion bottle but am wondering
> if this will work on an unpressurised system. It seems to me that it
> should not make any difference, because if the coolant cannot escape
> to the outside world when it expands then it should flow back into the
> radiator once it cools.
>
> Any opinions?
>
> Thanks
>
> Patrick Quinn
>
> Blue Mountains, Australia
>
>
>
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> Version: 2016.0.7859 / Virus Database: 4664/13409 - Release Date: 11/14/16
>
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<p><font face="Arial">Hi Patrick</font></p>
<p><font face="Arial">The radiator should not be filled to the top.
Fill it only to about an inch from the top to allow for the
water expansion.</font></p>
<p><font face="Arial">This was the norm before expansion tanks were
used. My Silverstone ran this way all through the highs and lows
of Italy in 32 deg plus days.</font></p>
<p><font face="Arial">Regards</font></p>
<font face="Arial">John Rowe</font><br>
<font face="Arial">Perth</font><br>
<br>
<div class="moz-cite-prefix">On 15-11-2016 4:37 AM, Patrick &
Caroline Quinn wrote:<br>
</div>
<blockquote cite="mid:008a01d23eb6$e7a81cd0$b6f85670$@tpg.com.au"
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">G?day<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">I know the subject of fitting
a coolant expansion bottle has been covered before, but this
has a twist as it concerns a Healey and not an
Austin-Healey.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">Our Healey Duncan has its
original cooling system that is unpressurised. It?s assisted
by an electric fan in front of the radiator, but with our
warmer climate it persists is dumping its coolant out
through the overflow pipe.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">The radiator cap is a screw
on type and the overflow pipe exits the radiator header tank
separately in front of the cap. Being unpressurised there is
nothing to stop the hot and expanded coolant from exiting
via the overflow pipe.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">I am thinking of fitting a
coolant expansion bottle but am wondering if this will work
on an unpressurised system. It seems to me that it should
not make any difference, because if the coolant cannot
escape to the outside world when it expands then it should
flow back into the radiator once it cools.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">Any opinions?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">Patrick Quinn<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif"">Blue Mountains,
Australia<o:p></o:p></span></p>
</div>
<br>
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<p class="" avgcert""="" color="#000000" align="left">No virus
found in this message.<br>
Checked by AVG - <a moz-do-not-send="true"
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Version: 2016.0.7859 / Virus Database: 4664/13409 - Release
Date: 11/14/16</p>
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