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Is your antifreeze leaking on the ground in the front of the motor ? There are many different things to do to find the right answer to this question. 1 : pull the motor dipstick. If oil mixes with the water - antifreeze the dipstick will look milky. If it does not. And looks good. Then 2: with water in the radiator don't put antifreeze in it keeps wasting $$ til leak is found. 3 : start motor look from under the front of the water pump with a flashlight if you have a dripping from a weep hole in the water pump bottom behind the fan. If you can't find a leak shut off the motor. Feel the bottom of the water pump if there is a presence of water you'll need a new one. If not .4:if the motor is over heating or has been blowing antifreeze out of the overflow hose along the side of the radiator. If so the thermostat may be stuck. Much cheaper repair.
ALL antifreeze leaks will be seen coming from the bottom of the car. Yes, it COULD becoming from the water pump. But then again, it could be coming from an intake manifold gasket, a heater hose, a throttle-body heater hose, a freeze plug, a timing cover, a heater control valve, etc.. To find out where it is leaking from, you must follow the antifreeze trail UP from where you see it leaking. Antifreeze leaks ALLWAYS travel downhill. Sometimes they can be deceiving also. I have seen intake manifold leaks at the front of the engine run all the way to the back of the engine and make it look like a rear freeze plug is leaking. Again, you must follow the trail to find the actual source.
Even though you do not feel antifreeze on the rugs. The only way
the smell of Anti freeze can get in the cab is, It's leaking from the heater core.
Maybe not enough to see a leak on the floor.
However, the heater core is inclosed, plus antifreeze will not
dry. it can sit at the bottom of the heater box, for a long time.
And the smell can stay in there for a long, long time.
the fuel system is seperate from heating system.check water pump the impeller could have deteriated i have seen this in another cavalier,once i removed water pump the blades that move the water were full of holes.but first make sure ther is good flow to the heater core.also hope you used a 50/50 mix of antifreeze because solid antifreeze wont heat up.
A car this new should have a warranty right? the only other place for anti-freeze to go is through a blown headgasket into your oil. Pull out your oil dipstick and make sure it is not milky in color. If not check behind the engine and see if any coolant lines going into the firewall are leaking. When inside the car do you smell steaming coolant(anti-freeze) or hear gurgling? The temp gauge that stays on is the overheat indicator?
You need to look closely at the hose connections, freeze plugs, and the water pump. Water pumps are designed so that when the shaft bearing wears out, they leak from a small hole under the pulley shaft. Sometimes they will only leak while the engine is running. Freeze plugs can rust through causing a leak usually from the side of the engine. Hoses can leak from anywhere. You'll probably have to get under the engine to narrow down the possibilities. You may also want to rent a tool to pressurize the cooling system. That might help you to see where the leak is coming from. If you've never changed a water pump or a freeze plug before, you might be better off taking it to a professional. If it's just a hose, you could probably do that yourself. I hope this was helpful. Thanks.
my 2001 catera just had the same problem i had the crank sensor replaced car wont die so far no problems starting but it has a antifreeze leak in the bottom seal of the engine. I have heard this is due to the dexcool that the manufacture decided was better than reg antifreeze and the repair bill for the labor is crazy still havent changed the bottom seal yet