idosubaru Posted June 6, 2014 Share Posted June 6, 2014 2003 Outback H6 When I remove the radiator cap, a quick split second burst of coolant spits out of the overflow tank where the rubber hose goes into it. The radiator is a few cups low and the overflow tank is overfull. So coolant is getting pushed into the overflow but not sucked back in the radiator. New Subaru radiator cap. No other symptoms. Headgasket? Guess i'll test for exhaust gases in the coolant, a compression and leakdown test is out of the question with those annoying spark plugs. Quote Link to comment Share on other sites More sharing options...
bratman18 Posted June 6, 2014 Share Posted June 6, 2014 My SOHC 2.5 did that when the head gaskets were bad. Exhaust gas was pressurizing the coolant. Quote Link to comment Share on other sites More sharing options...
CNY_Dave Posted June 6, 2014 Share Posted June 6, 2014 Ohhh, not sounding good. Quote Link to comment Share on other sites More sharing options...
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