I do this sometimes..
works quiet well actually.
I take a heat gun ...a shop/industrial type, not a hair dryer ..
and rig it so it's aimed at whatever I want to not freeze, like maybe a
foot and a half away..
and I just leave it going all night on low.

I did that for about 8 mights and days during  much worse-the-usual
freezing than Southern Oregon is used to..aiming it at exposed water
pipes that could freeze and burst ..works like a charm.

and the ribs on the bottom of the water boxer case, since they increase
surface area...
those would even help with this method.

Scott

On 12/25/2013 7:45 PM, Ian Allan wrote:
> Lots of theory here but if you can get a WBX to start in Calgary in the winter with the Pyroil unit installed I would say that it works. Can't think of a better $100.00 solution can you? Now if you are going to Alaska or say the pole you may need to upgrade...
>
> Ian Allan
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>
> 85 Westfalia/Bostig
> 84 Westfalia
> 02 Jetta 1.8t
>
> 08 Sprinter
>
>
>