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Message: <blockquote data-quote="David Griffith 2" data-source="post: 865383" data-attributes="member: 63363"><p>Replaced the cap. Still leaking from the back of the o ring on the housing. I can hear what sounds like sizzling when I turn it off after idling for about 5 minutes. It doesn't seem to be the coolant sizzling it seems to be pressure on the t-stat housing..i can see it trying to spit fluid out of the o ring. Seems like the pressure really builds up when I turn it off. Also seemed to build more pressure as it idled. Any suggestions? :wacko:</p></blockquote><p></p>