Heater Core Bypass Front Unit
If i bypass my front Heater Core due to a leak and a costly repair will my rear heater still work, i have a:

2001 Ford Expedition 5.L W/ Rear AC & Heat

I have been getting mixed answers to this

Also can i add something like Bars Leak or Alumiseal for a temporary patch until i can afford proper repair and if so do i just pour it in the reservoir

or maybe a suggestion on what i can do if BY PASS is not an option

 

I've been considering this same thing. Hasn't been an issue the past year when the front core started to leak as I was in Savannah, but not I am in NC and we are driving to NYC tomorrow for relief work, so here I am trying to find the info. Frankly I don't see why it shouldn't work, I was mainly just trying to find info as to which hose lead to which heater core. You said that you had been getting mixed info on this, what have you found out so far? I'll also ad more information if I can find verification somewhere.

 

do the bypass, won't hurt a thing as long as the coolant continues to flow. if you just block the hoses off, that will cause problems…
be sure to get all of the air out of the system afterwards, look for high point vents.. (may be a plug on a manifold)… run the engine until warm then top off the coolant in the radiator..