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Message: <blockquote data-quote="LI98GT" data-source="post: 477523" data-attributes="member: 8068"><p>You may have the infamous plastic upper intake manifold crack/leak unless you upgraded in the past to the aluminum crossover. If plastic, try to look and feel near and behind the t-stat area for any antifreeze. Hope it's that easy for you, otherwise you've got to go hunting. Could be heater core, leaking hose, leaking radiator, leaking O ring for T-stat, or even something major as a headgasket for example... many possiblities. IMO, Start with the easiest and go from there.</p></blockquote><p></p>