[Healeys] Coolant Expansion Bottle

[Kimo Briske]

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 at tpg.com.au> 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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