Antifreeze Freezing Point?

Common mistrake.
Draining the radiator actually drains less than half of the total coolant,
the rest is still in the block. Top up with 50% mix giving a total coolant
antifreeze content of around 20%.
Some, but not all, engines have a drain plug on the block for this reason.

 

You are misunderstanding the meaning of windchill.
Windchill is the effective cooling on a hot human body. It cannot make
things colder than they already are, it just speeds up cooling.

 

So why does my freezer read -20 C , wind is passed over viens to cool the
applaince

Similar application to a car

 

See, now you're starting to get the hang of this Usenet thingy - first
wait until at least half-a-dozen other people have made a point, then
post the same thing yourself to make it look like you knew it all
along.

Congratulations.

 

Because the air is at -20C, obviously.

Duh.

 

Because that's not how a refrigerator works.

 

Every day's a school day. My mistake.

 

Only similar in as far as warm things are cooled down.

 

Nice theory, but none of the replies were on my system at the time that
I replied. Just a common usenet propagation issue when a whole flock of
people reply to the same thing.
Do I really need to explain how usenet works ?.

 

Why, did you invent that too ;-?

 

Nuffink to do wiv me guv, I was too busy inventing the wheel <B-).
RFC 977, 2980, 3077, 4644 all make interesting bedtime reading for
geeks though.

 

No. Fridges are 'heat pumps'. You'll find that the condenser (those
external vanes) are really very warm or even hot when it's pumping;
it's the temperature difference between them and the surrounding air
that allows heat energy to be dumped into the environment.

As the song goes:
# You can't pass heat from a cooler to a hotter
# you can try it if you like but you'd far better not-a

 

Bluecol never was as good as it claimed, that's true. I always used
50/50, but never believed it would protect to the minus temp Bluecol
said it would.

 

Do you really think Pip didn't know about block drains taps/plugs?

 

Or (more accurately) doesn't perspire. Or have a moist skin for the air
movement to induce chilling in through evaporation.

Phil

 

The symptoms indicate otherwise.
But ICBW.

 

Using the patented Mavis Beacon "Hunt&Peck" Technique,
typed

Might I suggest that you change your posting name?

 

I'll repost para #9 for your benefit:

"Having said that, when I reinstalled the radiator early the next
morning there was a patch of blue ice on the already-iced driveway,
culminating in a little blue twisty stalagmite pointing at the engine
block drain tap."

The clue is in the last four words.

 

OK, fair cop guv, but if you read the snipped bits I did start with
the words "Common error" implying thaT I was addressing the general
case rather than the specific.