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#14
08-13-2018, 09:47 AM
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Injector helical compression spring
Old springs should not be reused since they were subjected to metal fatigue and permanent deformation. New helical springs from Mercedes Benz cost about $5.00 (PN 000-017-04-17).
References: https://www.physicsforums.com/threads/how-to-tell-if-a-spring-is-fatigue-creep-or-degrade.891665/ “extremely rapid cycling over an extended period can result in internal heating of the spring wire that can result in a loss of spring rate and free length”https://www.benzworld.org/forums/w123-e-ce-d-cd-td/1316064-injector-rebuild.html 
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