99 Expedition EB.
I recently started smelling antifreeze in the cab. Doesn't matter if the heater is on or not. There was some leaking on the concrete, but couldn't find the source.
The smell continues and you can see the vapor coming in through the vents.

I'm no expert, but I assume it's the evaporator core, but wanted to ask if anyone had other suggestions.

Assuming it's the core, do you have to remove the dash to get to it? If not, is there a place to get a free description of how to do it?

Dizzy from the smell.

B

 

Sounds like your heater core has a leak. I haven't worked on your particular year vehicle, but the heater core on most Fords are on the passenger side, up under the dash, close to the fire wall. Just follow the two heater hoses in the engine compartment going to the fire wall to locate where the core is at.

On most trucks I've replaced these on, the heater core is in a plastic "bucket" behind the glove box. It's normally the lowest plastic part hanging from under the dash. The bottom part is a bucket held in place with a few bolts. It should have a tube to vent leaking fluid outside the cab. Just remove the bolts and take off the bucket. It should reveal the heater core for removal. The cores are normally held in place only by the clamps on the heater hoses.

I've never had to take apart the dash to replace one on a Ford. Chrysler vehicles, on the other hand, often bury the cores deep inside the dash requiring a lot of work to get access to them.

 

You basically have to pull the whole dash out of the truck to get to the heater core on these. Do a search, someone had printed up the instructions from the factory service manual.