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Re: 96 subaru outback 2.5, 152K over heating
You could try the old oxalic acid radiator flush, although I don't know where to get it any more. It cured several of my older-car problems that the now-current detergent flushes wouldn't. Could also be kinked heater hose, if your heater system has the heater core always hot (no heater cutoff valve).--ls1369
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