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Re: driving questions

To: Chris Chandler <spawn@net-link.net>
Subject: Re: driving questions
From: "Michael F. Adamson" <madamson@compuserve.com>
Date: Sun, 30 Nov 1997 22:12:05 -0500
DANMAS@aol.com wrote:
> Chris:
> =

> You may be right - it's been many years since I had a materials class,
and I
> didn't pay a whole lot of attention then - but I have always thought
about it
> a litttle differently.

        Well, it was more than a few years ago that I had the class, so I=

may
have gotten it mixed up...

> maybe I will go bore a hole in a piece of metal, toss it in the freezer=
,
and
> see if the fit to a bolt which has been kept at room temperature is
looser or
> tighter (hopefully, someone else will beat me to it and report back to
the
> group so I won't have to!).

Chris Chandler wrote:
<Let me know the results!  You've got me wondering now too.  Of course,
there's also the (possible) material differences between pistons and
rings and blocks to consider also.>

When materials get cold, ice is an exception, they shrink.  The atoms
occupy less space due to their decreased activity.  Holes in material
become larger.  A piece of material, say a piston, becomes smaller
therefore increased clearances.

Regards,

Michael.

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