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Sable Cooling System question
Have a cooling system question for you this morning. Not quite sure what is going on. Have a '99 Sable, 3.0. not the dual overhead. Car runs fine, heats up fine, brand new heater core, thermostat, water pump, freeze plugs, and overflow tank. Monday afternoon, on my way home from work, windshield started fogging up, and was getting a little bit of steam coming from the vents. Get the car home, and found that the radiator cap, on the overflow tank, broke. Roommate thought possible vapor lock. Replaced the radiator cap, and let it sit overnight. Started up yesterday, had ice on thw windshield, did defrost ok. Started the car yesterday afternoon, and fogged up the windshield again. Roommate looked and couldn't find anything. Started this morning, and was getting the smell of antifreeze again, but it did defrost the windshield.
Could I possibly have a leaky hose, or something more critical? If it were the head gaskets, I wouldn't be getting heat, and if it was the heater core would have antifreeze inside the car, if not mistaken. Any suggestions or ideas?
Also, how easy is it to change the ac filter? A buddy at work suggested that this might be causing the problem, as his mom had a similar issue w/ her Taurus, which was doing what my Sable is doing now.
Also, in addition, think may have a short somewhere. Whenever I do start it, the radio will start doing a autoscan searching for a channel, and won't stop. It will also dim the lights a bit. This happens whenever I turn the heater on. Does have a new alternator as well. Had to have that replaced about 6 months ago (died and drained the battery too). Any suggestions on that?