No heat and coolant from back of motor

[Mhaise57]

I was needing someone else to confirm my this. I believe my heater core has failed or does anyone else have an idea what might cause this? I notice the other day it said "Low Coolant" I checked it and it was find and thought it was just the resovior, well today I am driving and kicked on the heater and no heat. I started to get suspcious and went back to the house and poped the hood. I noticed no coolant was coming from the return and checked the hose going to the thermostat and nothing. No fluid. I go and turn the heater off, then BAM! the temp goes sky rocket. I killed it and then it started to smoke from the coolant tank. It wasn't coming from the return, it was pushing coolant back through the bottom of the tank. I replaced the thermostat about 20k miles ago and I just reached over 100K and its an 05. Any thoughts?

 

[EGRIZZLE]

Sounds like exactly what happened to my 04 disco. Thought it was the heater core, but turned out it just needed new O-rings which was cheaper then a new core. I'm no expert, but it's probably one or the other.

 

[dantheman1]

I don't know if this is relevant, but I'd also check the actual water pump to see if there's any cracks or fluid spilling out onto the belly pan. I had my water pump and thermostat replaced for this reason at 90k.