Compression in cooling system - Ford Powerstroke Diesel Forum
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post #1 of 1 Old 04-06-2007, 08:10 PM Thread Starter Rookie
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Unhappy Compression in cooling system

I noticed the temp guage was starting to flucuate on my 2002 7.3L. Checked the coolant level & found it low, also found a crack in the top of the overflow resevoir. Replaced the resevoir today & now I'm getting air pressure building up in my cooling system. I don't find water in the oil & don't think I find any oil in the water, but now it seems to be forcing the pressure out somewhere else, like the upper hose, t-stat housing or water pump. Do I have a blown head gasket? Or a cracked head? HELP!
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