Cooling system

1995 SUBARU LEGACY
300,000 MILES • 2.2L • AWD • AUTOMATIC
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ROCKIE WIMER
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My car is leaking coolant when it is not running. I found the leak and there is a crack in the plastic piece that the lower radiator hose is connected to. I just replaced the radiator and the hoses. What is that plastic piece called? how do I fix it? And why does it only leak when the engine is turned off?
Jul 18, 2017 at 1:02 AM
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MHPAUTOS
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it will be the thermostat housing. the leak will be there all the time under pressure, when the engine shuts down, heat sink can raise the system pressure a little and you may notice the leak more at that time.
Jul 18, 2017 at 5:30 AM