Of course you are not blocking off the rad by putting cardboard there,
because if the heater is giving no heat (assuming a properly working system)
the stat will be closed anyway and there will be no heat in the rad. What
you are doing is restricting the flow of very cold air round the engine, it
is that which is 'super-cooling' the system.
----- Original Message -----
From: <yd3@nvc.net>
To: "Barrie Robinson" <barrier@bconnex.net>; <mgs@autox.team.net>
Sent: Friday, June 07, 2002 5:23 AM
Subject: Re: radiator mystery
> Barrie:
>
> <<<snip>>>
> cut a piece of cardboard to cover half of the rad
> <<<snip>>>
> I have to do that with my Datsun's. Japan didn't know what cold was
> until the 1980's. Even with a new 180-190 thermostat, I can't get the
> heat I need for the cabin. In the winter, the vehicles run colder than
> in the summer, unless I cover 2/3 of the radiator. The cardboard will
> also help the engine warm up faster, hence heat inside faster. Just
> make sure you put a note beside the temp gauge to remove the cover
> sometime in March!
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