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Message: <blockquote data-quote="cavell" data-source="post: 22155" data-attributes="member: 3370">I’ve done a number of headgasket jobs on equinox’s and always have heatercore issues so I monitor cooling temps as part of job.My last one would run at 190f with a 195 thermostat. It had a “weak” spring. You should replace your thermostat to start.I do know the fans seem to turn on around 205-210 and seem to turn off around 204. There is a lag. But I’d say in the 200-210 range.I almost always have to flush heatercore but I am fixing headgasket issues and am pretty sure previous owner used stop leak.</blockquote>