Car overheating and no heat inside?

Question:
Car overheating??
I have a 96 Mercury Sable. The car is overheating and radiator resivior is gurgling. And there the heat in the car is blowing only cold air. We changed the thermostat and it didn't help?? the antifreeze was leaking of out of the resivior but that's the only place it was leaking. so far it's not leaking any more at all. i was told by some one it might just have air bubbles in it and it could be causing pockets of air therefor the anitfreeze can't get to the engine ?? and we should try to get the air out? but what does that have to do with the heat coming out cold? also we can't find the radiator cap? just the resivior cap

Answers:

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Could be just air bubbles. The cooling system is what goes through your heater core to produce the heat also in the car which is why you have no heat if there is bubbles or if the fluid is too low, or possibly there is a clog at the heater core as well. But... .if you don't have a cap on the radiator, the system can't create pressure and heat properly either. Go to Wal-Mart, get a new cap, start the engine and let it run with the cap off for a couple of minutes to get bubbles out and while it's running, add any fluid that you might be low. This fills the system without creating the possible air bubbles. Put the cap on and see if that helps any.

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Water should not be bubbling out of reservoir either that's usually the sign of a blown or leaky head gasket. If you recently added some fluid you may have overfilled if it has stop bubbling by now.

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OK if your car is overheating you have a cooling system problem, no heat inside means the hot water is no reach the heater core or a close valve or something, or the water pump could be bad.Last thing thermostat you have to know it's working don't Never think that you can't buy something bad. (Not going with the air bubble theory hope this helps.)

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try changing your thermostat.

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the thermostat regulates the water temp that goes through the car. when it goes, you have no heat.

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it is located in the hose that leads from the radiator to the engine-it's on the engine side.

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I'm thinking that the water pump is done. When it is not working the hot coolant stays in your engine and overheats and the heater core does not get any warm coolant to put heat inside your vehicle. This also will happen if the belt is gone or slipping.

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