bubbling/boiling sounds coming from around the radiator/passenger side in a 2001 dodge stratus.

When you replaced the thermostat, did you also flush the radiator and refill with the appropriate amount of the recommended antifreeze? Most leaks are from hoses or connections. Start the car and turn the heater to high, watch under the hood for leaks around the hoses, the thermostat housing, and the water pump. Also watch to see if any of the hoses collapse. Any leaks around the thermostat housing or water pump indicate that you need to replace the gasket and use some blue rtv. Make sure when you do that the surface is clean and smooth. and scrapes will need to be smoothed and any debris will need to be cleaned away. Any leaking or collapsing hoses need to be replaced. If the leak is from your radiator make sure that the petcock at the bottom is closed and not the source of the leak. If the leak is coming from around the fill cap then you will need to replace the cap. If the body of the radiator is leaking then it will need to be replaced.

OK..... What is the bubbling /boiling sound.......my car wasn't running hot at all until I turned on the heat to defrost the windows on wedensday.

I refilled the radiator. I didn't do a flush.

If you own a Dodge Stratus and you hear a bubbling noise under your hood check your antifreeze Reservoir if it is bubbling check your radiator cap or your hoses I paid hundreds of dollars to get my car fixed and it still was bubbling come to find out it was just a hole in the hoses it has not ran hot sense

Okay my car is a 2006 Dodge Stratus I replaced the thermostat and everything but it's still blowing out white smoke it doesn't read hot but it's blowing out white smoke