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Discussion Starter #1
Hey guys, any help/suggestions are greatly appreciated...

Driving to work today (05 300C 5.7L), as I was about to pull into the parking lot, my Hi temp warning came on, the temp guage on the dash was in the red. As I coasted in a parking spot, the needle dropped out of the red zone.

Popped the hood to check the coolant...I have one of those clear killerglass radiator hoses and I noticed right away that is was empty (it is usually full with fluid)... The coolant tank was empty also!?!?!

I haven't popped the hood since my last oil change (at the dealership, about 2 months ago), so didn't notice coolant levels, but assume that the dealership would have filled it if it was low.

Does coolant ever empty out completely like this? What should be my next steps? I was reading through the forums and read something about HOAT coolant, is this something I have buy specially from some place other than a gas station? Does the 300C take some sort of special coolant?

Not mechanically inclined, so if any checks/tests are suggested, please provide some detail.

Thanks!

***Hoping no serious damage was done to my big baby***
 

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Discussion Starter #2
Update:

Alright, checked under the car, there is a hole in the plastic pan underneath and it has leaked some pinkish fliud that I think is coolant. Also when you are looking down from under the hood, there is some liquid on the plastic housing by the fan, but the killerglass hose is not leaking...any ideas?
 

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That's too much water lost. I'm thinking you got a big leak somewhere; either external or (say it ain't so) internal. Obviously refill that radiator, but check your oil dipstick to make certain the oil isn't frothy/foamy. That's bad news if it is; it means you have an internal leak, probably a blown head gasket, allowing your coolant to mix with the oil. Let's hope, if it is a leak, that it's external, such as a hose or even the radiator itself. These suggestions are old-school for older cars, so I imagine someone more familiar with the newer car tech could chime in and give more (accurate) info.

As for me and my '06 C3C, the dealer does all of my maintenance and the always check/top off my fluids. The last temperature problem I had was my A/C dying on me. Dealer thought it was the A/C motor, but it turned out one of the (plastic) fans cracked causing it to scrape against the shroud, making the car think it was the motor that was going bad. Amazingly, despite the cracked fan, the mechanic was surprised the car never overheated, the temp gage remaining at the slightly-below halfway mark. This makes me believe the 5.7 Hemis are very good at temperature management. The loss of water from your system indicates something is seriously amiss. Let's hope it's a simple, but external leak.
 

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first don't put any coolant in yet fill it with water turn the temp knobs to full heat and set the fan to low blow and check for leaks.also watch temp gauge and listen for the fans under the hood to come on. if you have stock t-stat and fan settings they should kick in just before the gauge hits the red mark. is there rust stains around the overflow tank? do you smell coolant when near the car? check the water pump for rust near the bearing weep hole just under the shaft.
 

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Update:

Alright, checked under the car, there is a hole in the plastic pan underneath and it has leaked some pinkish fliud that I think is coolant. Also when you are looking down from under the hood, there is some liquid on the plastic housing by the fan, but the killerglass hose is not leaking...any ideas?
I see your Update came in within minites of my replay. Glad it appears to be an external leak.:fing02: "Pinkish fluid"? I'm still old-school, thinking coolant must be greenish. I'll let others chime in on that. Either way, gotta plug that hole.
 

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Discussion Starter #6
Thanks for the reply Dare!

Checked the oil...doesn't look frothy or foamy...looks pretty regular...Whew *wipes sweat from forehead*

I agree that it's probably a big leak somewhere...Should I be calling for a flatbed now? Or should I get coolant and drive it to a dealership? Is there a way to check (other than the temp guage) if I'm losing coolant too quickly and shouldn't risk driving?
 

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iv had a similar coolant leak issue for months now cause i have not had time to figure out where the exact leak is coming from which means i have to add water to the coolant reservoir every few days to keep it from going under the min level.

i would first add coolant to the car since it seems it is completely dried out if the car was over heating and once you have added the coolant i would take off that bottom belly pan so that you can actually see where the leak is coming from and then go from there but i would keep an eye on the coolant level every day or so to make sure it is not losing coolant at a fast rate because my coolant leak is slow and nothing major but still something i should get taken care of especially since winter is almost here again.

as for issues with the over heating, if you stopped and turned the vehicle off right away you should be fine unless you continued to drive it while it was already at the top of the red part then you might have issues but if not then i wouldnt worry too much and as for types of coolant, i use regular orange coolant from walmart that you can add water to rather than the add coolant one only since i cant afford to be wasting bottles of coolant every week. i think it is called dex cool or something of that sort but it is the silver/greyish looking coolant bottle at walmart.

i would buy about 2-3 bottles to fill your car if it is completely empty...

hopefully someone else can chime in and add to that or correct me if i am wrong...
 

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disregard my last post about adding coolant first since i see someone else posted right before i submitted my reply lol :pat:

i wouldnt drive it completely on water though....
 

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pure water is just to check for leaks why wast the money. i let my cars run a day or two after this kind of work just to be sure no leaks
also check the T-stat and be sure it did not fail open. just one overheat can cause it to fail open.
 

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Discussion Starter #10
Thanks HYPNO!

I'm gonna give it a shot, but i fear that I have a BIG leak somewhere because that tank is EMPTY. The car was turned off probably 30 seconds after the light came on, so I hope I'm good.

Thank you too JoJo...How can I check if my T-Stat has failed open? DTC? If it has, do I need a new one?
 

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the valve will open and not seated aganst the seat. if you see space between the valve and the seat it's bad. you do need to remove it.
if its a big leak you will know it but i think it was slow leak so you should be good. fill it start it up
 

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Discussion Starter #12
I filled up the coolant, then looked under the car...no leaks... Then I took it for a quick spin with the temp gauge only getting up to half. When I got back, I checked the coolant level again, it was near empty again! The bottom of the plastic bellypan had coolant on it.

On thing I did notice was that the Killerglass upper radiator hose did not fill up like normal, it was still empty. How does the flow of coolant go? Does it go in the lower hose then out the top hose or vice versa? Where does the t-stat come into play?

I took it to the dealership and am waiting on their diagnosis.

Looking for some input, so I have a better idea fo what's going on.

Thanks! All of your input is much appreciated!
 

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The coolant flow comes from the engine beneath the Tstat, into your killer glass and then on to the radiator and back to the water pump. If you've not had anything apart since the oil change, then I'd suspect the water pump leaking. To check for this you'll have to get under the car and remove the plast belly shield (for 10mm bolts). If the pump is leaking then you'll see water dripping quite rapidly any time the pump/engine is runing.

The killer glass would not have filled with water unless the flow was sufficient to blow the air into the radiator and eventually the overflow reservoir.

How many miles on your '05? Frankly I expect water pumps to go in something under 100k miles typically... at least I'd be watching closely starting at about 75k miles.
 

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the flow goes out the top hose to the radiator and back in the motor through the bottom hose. after you filled the tank up you need to start the motor and keep filling it as the motor will suck all the water till its full then the radiator will fill up then the tank. you might not put enough water in it. did you run the heater while filling it? air gets traped in there too.
 

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Discussion Starter #15
Thanks Goofy and JoJo!

My C just hit 60K. I won't be able to check the water pump as it's now sitting at the dealership. So if the pump is faulty, where does the coolant go (does it just splash at one end and end up on my platic belly shield)?

I did notice that I was getting a leak along the passenger side of the engine, but it looked like it was only water and not coolant. Just making sure here, but the place to put the coolant is on the driver side of the engine in the white plastic tank, right? And the reservoir is the smaller container attached to it? I ask because normally there is something right above the radiator, which I don't see on my car.
 

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ther is a hole drilled under the pully shaft on the pump it will drip a little at first telling you the bearing is going bad. then it will leak more as time goes by. then it pumps every thing out the hole. the dealer will find the prob for you i am assumig that why it's there
 

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Thanks for the input guys! The dealership says there's a big leak at one corner of the radiator and they can't fix it...gotta replace it =(

Sucks that this happened now, while I'm in Canada for work (for only a week)! The dealership here is charging me $908!!!!
 

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My temp light came on, I stopped as soon as I could find a place to pull off only to find I could see no coolant in the container. Oil was changed a month ago and I'm almost sure all fluids were topped off. It held a quart and about a half to put it at the cold fill line. After this, the temp indicator was a little below half way, where it always is normally. The next morning, I checked the coolant container only to see it was much below the fill line. I drove it that day with no rise in temp at all. Next day, I checked and it was again much below the fill line. This tells me there is a leak somewhere but I can not find it. The coolant is going somewhere but there are not wet spots on the ground or in the pan. I haven't taken it to the dealer yet because I'm on medical leave and just can't afford to take it in at the moment. Does anyone have any suggestions on what's happening with the disappearing coolant? Thank you.
 

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It sounds like u have a small leak and only leaks out when under pressure, your going to have to pressure test your cooling system to find the leak. Hope u feel better btw.


Sent from my Autoguide iPhone app
 

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Wow! That was quick-and thank you so much!!!!!!!!Maybe Chrysler won't charge an arm and leg to check that. Thank you for ur concern, I feel much better, n therapy and waiting for my dr to release me so I can go back to work til I retire in a few months.
 
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