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Message: <blockquote data-quote="ossagp" data-source="post: 165800" data-attributes="member: 1650"><p>I don't worry about springs anymore.  I used to.  I pull one down hard enough that the strap hooks won't shake loose.  I have springs I have been using for over 20 years.  They haven't lost 2mm. Most springs live well being  compressed 70% of their inbound travel.  I got to see a 470 Continental engine with 1400 hours, taken down.  It was 48 years old.  6 cylinders.  Some of them had to have been at max compression for about a sixth of those 48 years.  If you tried to find a difference with your eye or a tape you couldn't.  They all passed the compression test,  though none were reused.  I decided I worried too much.</p></blockquote><p></p>