My upper radiator hose blew off today. I put it back on drove my car home. Temp gage was past hot. (Only for a sec). I get home thinking my hose came off again. Not the case. I touch the upper hose its hot as hell. Touch the lower and its cold at the Thermos stat. I'm going to guess its a t-stat. I have not done one, my car has 160000 on it. But I got it used so I don't know if the past owner had it done.
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