Posted April 6, 20178 yr comment_517418 When I pump it up to the 13 lbs pressure, how long should it take to bleed off if the system is good? Mine drops slow enough that you can't watch it drop but over a half hour or so it moves a few pounds. Link to comment https://www.classiczcars.com/forums/topic/57452-cooling-system-pressure-test/ Share on other sites More sharing options...
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