Dec 5, 2005 #1 H2power Mechanical Joined Oct 29, 2002 Messages 17 Location US Could someone explain to me the difference between radiator caps with a spring pressed normally closed vacuum valve and a weighted normally open vacuum valve in the context of a automotive cooling system. Thanks.
Could someone explain to me the difference between radiator caps with a spring pressed normally closed vacuum valve and a weighted normally open vacuum valve in the context of a automotive cooling system. Thanks.