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

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?

by in Tampa, FL on May 10, 2014
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1 answer 2 comments
ANSWER by , May 10, 2014
How bad did it overheat before the radiator and t-stat were replaced?
COMMENT by , May 10, 2014
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.
COMMENT by , May 11, 2014
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.