Thanks rich,

I can imagine from your explaination that there's many stories of people
driving of without unplugging first.

And wrt the plugs I take it from the description it is what I know as a
welch or core plug that are used to plug the holes that the moulding sand
is poured out of.

Cheers Justin

>      There is another type that is inserted in to the engine block in
> place of what we Americans call a freeze plug. I believe you folks call
> it a soft plug. Again you plug it in at night and it will keep the
> coolant at about freezing in 30 or 40 degree f below zero temperatures.
>
--=20
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