I got a 98 Subaru Forester w/130k miles with a weird problem. The coolant overflow tank fills up over time, and if left alone will eventually overflow and then the engine overheats. I’ve been pretty good at remembering to pull it out then dump the coolant back into the radiator, oh, maybe once a wee…

98 Subi coolant overflow tank keeps overflowing

ok4450 May 18, 2012, 8:44am 7

Have you considered the possibility of an iffy thermostat or a clogged radiator? I wouldn’t get too wound up over a head gasket issue at this stage of the diagnosis.