gixer2000
Retrofit or Bust
What year expedition? I'm guessing 03-06 or is it a gen3?Evidently I've not spent much time under the hood of my Expedion. Which I'm OK with.
This week I've learned there is an electric pump that circulates water to the rear HVAC. Was news to me.
Several months ago I did replace what I thought was the heater hose on the passenger side- A line with a tee in it to feed water to the heater core at the firewall. So I struggle to understand - if a heater core is blocked, how and why would the water pump care? The water pump is still circulating fluid around the block and radiator.
Highways don't shut down when one exit ramp is closed is my pea-brain analogy.
Whats the PSI on your overflow box cap?
I ask because ive been told the second gen had a valve to turn off flow to the heater core for the front but have heard nothing about the rear having a pump.
I've found no pump or valve in my 07 EL and have covered every inch of that car in the last few years.