Re: [DML] Engine cover screens - necessary or not?

["Martin Gutkowski" <martin@xxxxxxxxxxxxxx>]

It's called heat soak. The moment the engine is switched off, the coolant stops flowing and for a period the engine actually gets hotter. It's why I don't like turning the car off when the fans are running.

Some cars have some pretty complex electrically driven water pumps to prevent heat soak issues

Martin

Sent from my BlackBerry®

-----Original Message-----
From: Peter Lucas <lucas@xxxxxxxx>
Sender: dmcnews@xxxxxxxxxxxxxxx
Date: Thu, 21 Feb 2013 17:28:46 
To: <dmcnews@xxxxxxxxxxxxxxx>
Reply-To: dmcnews@xxxxxxxxxxxxxxx
Subject: Re: [DML] Engine cover screens - necessary or not?


On Feb 21, 2013, at 6:08 AM, jtrealtywebspannet <jtrealty@xxxxxxxxxxxxx> wrote:

> Once the motor stops the heat builds up quickly.

I'm a little skeptical about that one, Dave. Sounds thermodynamically impossible.  If the motor isn't running, where is this heat coming from? None is being generated, so the temperature can only go down.  It is possible that the *compartment* could get hotter when the car isn't *moving*, but I don't see any mechanism by which the engine running or not would matter in a D.   Now, an engine with a mechanical fan might be another matter...

Am I missing something?

--Pete Lucas
VIN #06703





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