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2002 Mercury Cougar Question: changed radiator n thermostat. Now problems bleeding air.Thermostat sticks shut

 

Question

cheriwalker51, 2.5L V6, Tampa, FL, May 10, 2014, 11:40
 Rookie

Thermostat sticks until I burp it. Hear bubbles in lines n motor. Added water behind then replaced thermostat. Could that be the cause why it won't bleed?

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  • Answer #1

    May 10, 2014, 19:12
     Master

    How bad did it overheat before the radiator and t-stat were replaced?

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    cheriwalker51, May 10, 2014, 22:08
     Rookie

    It got hot but has no symptoms of a bad head other than air bubbles and a thermostat that sticks every 300 miles.

    Other than that it runs good. Doesnt get hot till thermostat sticks.

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    ziptie12, May 11, 2014, 19:23
     Master

    Thermostat 'sticking' because of air pocket. t-stat won't open until hot liquid hits it steam/hot air won't do it. Have it tested for a blown head gasket. Kits to test for combustion gases coming through cooling system are available at parts stores.

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