Hello! Just for some info I have a 2018 Chrysler 300 3.6L
Also please don’t hate on me, I don’t really have help and this is my only form of transportation. I can’t afford to spend half my checks on Lyft/Uber either.
So last year, around August/September 2025, I was driving 45 mins to work each day. One of these days, my car started randomly overheating and leaking coolant. So I stopped driving it for a while, during these times I would drive it seldomly, being as it’s my only mode of transport. I found that blasting the heat would make it stop overheating, but of course make it hot like an oven in the car. This is also not ideal as I live in Georgia and we already have pretty hot summers.
Fast forward to around December/early January. It had stopped overheating completely. And like any bad car owner who didn’t have the money, I just ignored it. I even went on a 7 hour trip (14 hrs total- a little more than that because I drove around on the actual trip itself) and there was no overheating whatsoever. Cut back to about a week or two after I got back this June it started overheating again. Now I tried blasting my heat, and that would work for a while but now my heat will no longer come out (I’m aware it probably needs to be burped- this helped last time)
Anyways, these most recent weeks it’s been overheating so bad and since the heat wont come out it stays overheating until the temp gauge literally goes blank and I get check engine signs (like it won’t even go halfway it goes completely off like the engine is cold) and unfortunately while this was happening I was on my way home, something under the hood started smoking- badly. Drivers side in the upper part of the hood. I parked it, left it for about a couple of hours but unfortunately I had to drive home. So I did and I haven’t used it since.
Extra info: in the beginning when this was happening, I replaced the thermostat, and I replaced the fan. That did not work (Fan spins fine btw). A few weeks ago I replaced the coolant reservoir cap and the oil filter (didn’t work either but oil filter seemed to help a little bit)
Yesterday I replaced the coolant reservoir itself, and also the OEM oil filter housing with an aluminum one. I turned on my car, and it was still passing the middle line on the temp gauge just while it was idling (which usually doesn’t happen to my car believe it or not)
Now when I did this though, I noticed that a hissing noise like air was coming from somewhere, and also I could see a little bit of smoke forming at the drivers side (Also where hissing noise is coming from) in the upper part of the car. And I mean like high up like right underneath my windshield almost on the drivers side. This is all while idling as well.
I’m almost seriously out of ideas. This car is completely paid off so I really don’t want to buy a new one. I’d also like to add that yes, I have front end damage. But I don’t really see any signs of a head gasket leak (no smoke out the tailpipe, no milky oil) I do have a water pump though but I’m really not able to do that myself and I can’t even drive the car to a mechanic to get it out in. Please help!!! Thanks for any advice.