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Well, starting to give up on this car. I recently had my car worked on, the idler pulley was replaced per a TSB and the cooling system was bled since it was "gurgling and sloshing". The sloshing is coming back and now I am smelling antifreeze. Maybe I should have traded it in after all... :( I am not seeing any leaks, and there is no antifreeze on my garage floor, so if there is a leak it is so small it evaporates before it can drip, maybe it's getting caught on a plastic panel under the car and then drying up. My cooling system is out of warranty since I have over 36,000 miles on it, but I never had problems until after the water pump was replaced (long before 36K miles), at least not with the smell and sloshing. My wife's 200 does none of this, so something isn't right for sure. Guess I i will look under the car tonight to see if I can see any visible evidence of leakage.
 

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Is the smell inside the passenger compartment or under the hood?
What was determined that causes this "sloshing"?
 

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Discussion Starter #3
Is the smell inside the passenger compartment or under the hood?
What was determined that causes this "sloshing"?
Under the hood.

They said it had not been bled properly after the water pump replacement, so they bled the system. It was fine for a little while. When I first brought it in, I showed them that the coolant level was low.
 

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I'd run it until the motor gets good and hot then shut it off and look for leaks with a bright flashlight. I chased that coolant smell for quite a while once on a car and it turned out to be a drip from a bad radiator cap. It would dry up like you said, new cap and the smell was gone.
 

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Discussion Starter #6 (Edited)
Hey Black Knight,
When did you last have your 200 at the dealer and how long after did you start to notice this smell?
I got my car back from the dealership the afternoon of January 29th. I noticed the smell the middle last week.

Last night after a 20 mile commute - I popped the hood and heard a "sizzling" kinda sounded like an air leak, it was coming from the coolant reservoir cap. So I grabbed a thick rag and pressed on the cap for a second, and the air noise went away -nose came back after I released it. Is the cap the problem or too much pressure in the system? I also notice what looks like dried up coolant on the top of the tank near the cap, could be it was just a little spillage from when it as bled?
 

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I got my car back from the dealership the afternoon of January 29th. I noticed the smell the middle last week.

Last night after a 20 mile commute - I popped the hood and heard a "sizzling" kinda sounded like an air leak, it was coming from the coolant reservoir cap. So I grabbed a thick rag and pressed on the cap for a second, and the air noise went away -nose came back after I released it. Is the cap the problem or too much pressure in the system? I also notice what looks like dried up coolant on the top of the tank near the cap, could be it was just a little spillage from when it as bled?
This is interesting... I am having the same issue and this is all after they flushed the coolant system too. I notice a faint coolant smell coming from the front of the vehicle after the car is driven for 20 minutes.... I am going to look at the fill cap for the issue. I do not hear a hissing sound though and the coolant does not appear to be dropping but non the less I do smell coolant.
 

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It's worth a try to replace the cap.
I bought a cap at lunch. I will replace it tonight when it cools down sufficiently. 5 bucks for the cap well worth a shot I agree.

I'll post back if that does the trick to eliminate the smell and sound. It's not audible when the hood is closed only when it's open, at full running temp and the engine off.
 

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I'd do that to avoid going back to the dealer! I found a few drips of oil under my 200 V6 a month ago. The oil appeared to be coming from the oil drain plug. I remembered the oil drain plug has a poor excuse for a built in rubber gasket that I saw last oil change. I went to the local auto parts store and bought a really nice replacement plug with a very stout looking built in rubber gasket, it was $6.00. Did the quick oil plug swap, only lost a little oil. While I was under the car I checked the oil drain pan bolts. All the bolts took a half turn or more according to the torque wrench built in to my arm. Been a month and no more drips. All well worth it to avoid the dealer.
 

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I could understand a little smell after cooling system service even if it was done perfectly. There is bound to be a little coolant spilled during the work and it would make a smell under the hood until it all dries up.

But the return of the sloshing sound means something is still wrong and it really ought to be fixed before something really bad happens to the motor. If it was my car I'd top off the coolant with the correct Mopar type for the year of the car (mixed to the right concentration with distilled water) and listen closely to see if the sloshing sound is still there. If you still hear the sloshing I think you ought to take it back to the dealer. Sometimes they have to jack up the front end of a vehicle to help get the air out. There is also a vacuum bleed machine for cooling systems that dealers use.
 

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Discussion Starter #12
I could understand a little smell after cooling system service even if it was done perfectly. There is bound to be a little coolant spilled during the work and it would make a smell under the hood until it all dries up.

But the return of the sloshing sound means something is still wrong and it really ought to be fixed before something really bad happens to the motor. If it was my car I'd top off the coolant with the correct Mopar type for the year of the car (mixed to the right concentration with distilled water) and listen closely to see if the sloshing sound is still there. If you still hear the sloshing I think you ought to take it back to the dealer. Sometimes they have to jack up the front end of a vehicle to help get the air out. There is also a vacuum bleed machine for cooling systems that dealers use.
Cooling system is out of warranty.

Chrysler in cooperation with the dealer I bought my car from have been good about fixing current issues related to problems that happened before basic warranty was over. I just don't want to wait for 2 weeks to get it in. Before this it had been sloshing for months with no issues and the coolant was slightly low so I am not too worried. If the cap fixes the noise and smell, I will bleed it or have it bled again and go from there.

If the engine blows up maybe I will arrange for a piano to "accidentally" fall on it as I am well insured, then I can justify getting a Charger or something, maybe a new 200. ;)
 

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Discussion Starter #13
After replacing the cap and running it again, the smell seems to be gone, but I don't want to call it yet. The sloshing remains, but not as bad as before they bled the system. There were purple/pink crumbs all over the edges of the bottom old cap. I think if I bleed it or have it bled again, this issue could be over.
 

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After replacing the cap and running it again, the smell seems to be gone, but I don't want to call it yet. The sloshing remains, but not as bad as before they bled the system. There were purple/pink crumbs all over the edges of the bottom old cap. I think if I bleed it or have it bled again, this issue could be over.
Thanks for the update! If you take it back into the dealer and need some assistance, don’t hesitate to contact me.
 

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It seemed ok after the cap replacement but it's fixed for sure now with the 2015 Chrysler 200S AWD upgrade kit I found at the dealer.
 

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This is interesting... I am having the same issue and this is all after they flushed the coolant system too. I notice a faint coolant smell coming from the front of the vehicle after the car is driven for 20 minutes.... I am going to look at the fill cap for the issue. I do not hear a hissing sound though and the coolant does not appear to be dropping but non the less I do smell coolant.
UPDATE...
I replaced the radiator cap 2 weeks ago and the smell and light hissing noise is now gone. Easy fix for sure!
 

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Smell of Antifreeze

Add me to the list of people that dealt with the smell of antifreeze. I have a 2017 2.4 that I bought used with 15K miles on it. When the engine would get hot I would always smell antifreeze outside the car. I finally had it checked under warranty and the dealer said they couldn't find a problem...but...the problem was greatly reduced after the check, but not totally eliminated. So I went ahead and bought a new cap from the dealer and now the problem is gone. Interestingly my new Mopar cap, pictured on the right, has a different configuration than the original Mopar cap I replaced.
 
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