temperature is fine at idle, but gets hot when driving

Asked by May 01, 2016 at 12:10 PM about the 1997 Subaru Legacy 4 Dr Outback AWD Wagon

Question type: Maintenance & Repair

3 Answers

86,925

Slow coolant flow, causes could be a bad water pump, partially plugged radiator, thermostat not opening fully, electric cooling fan running backwards, sounds weird I know but I have seen it happen.

3,530

Most probably catastrophic head gasket failure that's allowing percolation of exhaust into now-superheated coolant. Send this chariot to a bone yard....

5,995

Like TheSub said (except getting rid of it - that's up to you). Good read: https://allwheeldriveauto.com/subaru-head-gaskets- problems-explained-part-ii/

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