 Nyorai kuenderera mberi kweiyi ndima - Pope Pius XII akasarudza Valdés semubhishopi wekutanga weOsorno musi wa20 Chikumi 1956 naSebastiano Baggio vachimupa kuzvitsaurira kwebhishopu musi wa16 Gunyana. Valdés akapinda misangano yose yechipiri yeVatican Council kubva musi wa11 Gumiguru 1962 kusvika musi wa8 Zvita 1965 semubati weKanzuru. Akanga ari mutsigiri anoshingaira uye mutsigiri akasimba wekutaurirana nerunyararo pakati peChile neArgentina munharo yavo yemuganhu uye akaita kakawanda kukumbira nhaurirano dzehukama dzakanangana nekuona kubatana kuri nani uye kugara pamwe pakati penyika mbiri idzi. Valdés aida nziyo tsvene nemhemberero dzechitendero uye muna 1966 akatungamirira Episcopal Commission pamusoro pemhemberero dzechitendero kuti awedzere kunaka mhemberero dzakadaro sokuratidzwa kwokutenda. Akatsaurira kereke huru itsva yedhiocese muna 1977 pashure pokunge yekare yawira mukudengenyeka kweValdiviamuna 1960. 