I have a 1999 Subaru Legacy Outback 2.5 that is overheating


Asked by Jan 30, 2017 at 08:25 PM about the 1999 Subaru Legacy 4 Dr Outback AWD Wagon

Question type: Maintenance & Repair

My Subaru is overheating, i notice every time I idle, the upper hose gains
pressure, but whenever the check engine light starts blinking it starts
overheating, and shows Cylinder 3 Misfire, want to know if it is related.

7 Answers


Yes probably is related. I suspect a blown head gasket.


Do you have a lot of white smoke out the exhaust?


Check the coolant level and make sure the cooling fans come on when it is hot. Check the coolant for oil and the engine oil for coolant as you have a Subaru and head gaskets are always suspect. Mis- firing could make it run hotter so you should probably replace the plugs and the wires.


Hi, i have read a lot about the head gasket and i am quite sure it is that the issue, but i am concern about the something else gone bad, it is showing a lot of smoke every time I idle it, the fans are working fine, but the thing i notice today, is that whenever i idle the car even parked, the hose gets more pressure and the radiator cap is cold even when the temperature on the dashboard says its hot.

2 of 2 people found this helpful.

Maybe you need to replace the thermostat.


" it is showing a lot of smoke every time I idle it " Well there you go, sounds like a head gasket to me.

1 of 1 people found this helpful.

The hose gets more pressure because the cooling system is being pressurized not only by the heat of the engine, but also by combustion gasses from the pressure of the combustion process. Head gasket failure is very common on Subarus especially the higher mileage units. Getting rid of it or repairing it are your options.

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