I can smell coolant when I turn on my heater im guessing the heater core has a leak but I dont see any leaks.I had a coolant leak the other day but it was a bad radiator hose so i bought a new one and that leak is gone now.where would the heater core be leaking in the cab? cause theres no leak in the cab.how much does a new heater core cost and how hard is it to change?and where is it located?thanks

Def soounds like a leaky heatercore.
If I'm not mistaken, there is a shroud that covers the heater core up that can actually trap fluid until there becomes too much and it begins to leak onto and underneath carpet.
Heater core isnt expensive, maybe $75 but it's Labor intensive. The entire dash and heater box assembly needs to come out to get to it! Book time is like 8hrs for experienced mechanics.
If you look from the engine bay on the firewall, you can see the coolant lines going into the firewall onthe pass side. Those are the heater core legs. The body of it is on the inside of the firewall there.
I would highly reccomend replacing your blend doors in your heater box while you have it apart. Those always go bad.($10 items)

Dirtydog is right...Heater core is the only possible cause.

I'd like to know about this myself.

I have a coolant leak somewhere, and only at random times do I smell coolant from my vents. It isn't often, but I don't know where my coolant is going.

I still suspect a head gasket because I can NOT find any leak, my carpets aren't wet from coolant, and when I start the truck I get smoke from the tailpipe.

However this tailpipe smoke doesn't smell like coolant at all. I've added dye to the coolant but I'll be damned if I can see it anywhere, and I've got a pretty powerful UV light.

Wouldn't it be nice if mopar punched a bigger slot on the firewall, used a gasketed cover, to allow the core to be removed from the engine bay?

Only way to get glycol smell out of the vents is A), drawing the smell from the engine bay thru the fresh air opening, or B) a leaking core.

I'm personally leaning towards the smell coming from the engine bay through the fresh air vents since it isn't happening all the time.

That still leaves me confused as to where the bloody leak is. The only place I've seen dye/fluid is from the overflow hose on the tank. But I don't think the overflow would be dumping +/-2L of coolant every couple of weeks.

Are there "common" places that coolant would leak from that my lack of experience on Dodges would cause me to overlook?

I can't really get underneath it as it's now officially winter here, but maybe we can help everyone here by identifying such areas?

When my degas bottle was cracked I could definitely smell it in the cab of the truck, especially coupled with hard acceleration.

The real concern is why its continuously leaking out of the overflow tube. My truck started doing that after I replaced the leaking degas bottle, and it was indeed a fubar head gasket pushing exhaust through the cooling system. The smoke out the exhaust came shortly after.

That is interesting.
A head gasket failure, pressurizing the coolant circuit with exhaust gasses.
Thinking about, yep, that is possible.
Sooooo........... on that thought. When the engine is off. No exhaust. Pressure then will be higher in the cooling circuit. Reverse flow - then? Coolant into the block?

my trucks now leaking coolant out of the overflow tube from the coolant reservoir why whould that be leaking?would that have to do with the heater core or no?