Date: Wed, 08 Sep 2004 12:53:29 GMT
From: Bob <>
Subject: Re: Oil plug gasket..

On Tue, 07 Sep 2004 14:06:36 GMT, (Andrew Stephenson) wrote: >In article <pq9rj0h2uvgnpfm0qhjkt2oojp3cj5qiv1nospamcom> > "Bob" writes: > >> SO you're saying that the copper gets hardened through the >> heating and cooling cycles of the engine running? I've always >> wondered about these things... I thought we changed them due to >> scratching during tightening. But, I was just guessing. > >Just in case this doesn't get said... Vibration and generalised >"working" (ie, mechanical flexing) of the copper will harden it. >Some of this will come from temperature cycling; but don't forget >how much vibration happens during everyday operation. > >Work-hardening, I was once told, is why chains used for carrying >loads should be annealed (put through a softening heat treatment) >at intervals, to stop them getting too brittle. Interesting. I knew you could harden copper this way but I never thought of general vibration as being enough to do the job. Makes sense through.

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2020 - The Saab Network -
For usage guidelines, see the Mission and Purpose Page.
[Contact | Site Map | on Facebook | on Twitter | Shop Amazon via TSN | Site Donations]