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You are correct. As long as the overflow tube is tight/ with clamp ?/ the
over flow coolant will be sucked back into the radiator as the system
cools. the correct cap is essental. Aloha. Jim
On Mon, Nov 14, 2016 at 10:37 AM, Patrick & Caroline Quinn <
p_cquinn@tpg.com.au> wrote:
> G=E2=80=99day
>
>
>
> 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=E2=80=99s assisted by an electric fan in front of the radiator, but wi=
th our
> warmer climate it persists is dumping its coolant out through the overflo=
w
> 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 th=
e
> 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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>
>
>
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<div dir=3D"ltr">You are correct.=C2=A0 As long as the overflow tube is tig=
ht/ with clamp ?/ the over flow coolant will be sucked back into the radiat=
or as the system cools. the correct cap is essental. Aloha. Jim</div><div c=
lass=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Nov 14, 2016 at=
10:37 AM, Patrick & Caroline Quinn <span dir=3D"ltr"><<a href=3D"ma=
ilto:p_cquinn@tpg.com.au" target=3D"_blank">p_cquinn@tpg.com.au</a>></sp=
an> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-AU" link=3D"bl=
ue" vlink=3D"purple"><div class=3D"m_2303715883845257317WordSection1"><p cl=
ass=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:"Times N=
ew Roman","serif"">G=E2=80=99day<u></u><u></u></span></p><p =
class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:"Times=
New Roman","serif""><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:"Times New =
Roman","serif"">I know the subject of fitting a coolant expa=
nsion bottle has been covered before, but this has a twist as it concerns a=
Healey and not an Austin-Healey.<u></u><u></u></span></p><p class=3D"MsoNo=
rmal"><span style=3D"font-size:10.0pt;font-family:"Times New Roman&quo=
t;,"serif""><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"=
><span style=3D"font-size:10.0pt;font-family:"Times New Roman",&q=
uot;serif"">Our Healey Duncan has its original cooling system that is =
unpressurised. It=E2=80=99s assisted by an electric fan in front of the rad=
iator, but with our warmer climate it persists is dumping its coolant out t=
hrough the overflow pipe.<u></u><u></u></span></p><p class=3D"MsoNormal"><s=
pan style=3D"font-size:10.0pt;font-family:"Times New Roman","=
;serif""><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:10.0pt;font-family:"Times New Roman","seri=
f"">The radiator cap is a screw on type and the overflow pipe exits th=
e 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.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=
=3D"font-size:10.0pt;font-family:"Times New Roman","serif&qu=
ot;"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"f=
ont-size:10.0pt;font-family:"Times New Roman","serif"">=
I am thinking of fitting a coolant expansion bottle but am wondering if thi=
s will work on an unpressurised system. It seems to me that it should not m=
ake any difference, because if the coolant cannot escape to the outside wor=
ld when it expands then it should flow back into the radiator once it cools=
.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:1=
0.0pt;font-family:"Times New Roman","serif""><u></u>=C2=
=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:10.0pt=
;font-family:"Times New Roman","serif"">Any opinions?<u=
></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:10.0=
pt;font-family:"Times New Roman","serif""><u></u>=C2=A0=
<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;fo=
nt-family:"Times New Roman","serif"">Thanks<u></u><u></=
u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-fa=
mily:"Times New Roman","serif""><u></u>=C2=A0<u></u></s=
pan></p><p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:=
"Times New Roman","serif"">Patrick Quinn<u></u><u></u><=
/span></p><p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-famil=
y:"Times New Roman","serif"">Blue Mountains, Australia<=
u></u><u></u></span></p></div></div><br>______________________________<wbr>=
_________________<br>
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<br></blockquote></div><br></div>
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