Coolant Leak Auxiliary (rear) heater core

[Will Williams]

Maybe this should be part of the coolant leak previously posted. Anyway for weeks I have been trying to find where the coolant was leaking from. Since there was no smell or wet floor inside the vehicle I did not think it was the heater core. Or shall I say the only heater core that I could think of. I forgot this vehicle has heat for the rear of the vehicle so there is an auxiliary core for the back of the vehicle. In the morning I will try to confirm this and figure out if it is the hose, connection or the core itself.

Will

 

[bobmbx]

My Mountaineer developed a leak in one of the rear heater hoses. It was in the well where the core is. I had to remove most of the interior panels on that side to get to it. Pain in the butt. Luckily, the pin hole was in a part of the hose easy enough to cut out and splice in a new piece with two screw clamps and two adapters. I noticed it because the condensate drain was dripping coolant on the driveway behind the rear wheel.

 

[Will Williams]

I just confirmed where the leak was coming from. One of the metal hose that supplies the auxiliary heater core for the rear of the vehicle was leaking. it was due to a broken bracket which was to hold the hose in place. The hose was rubbing against the fire wall, weaken the hose.

 

[ExpeditionAndy]

I just confirmed where the leak was coming from. One of the metal hose that supplies the auxiliary heater core for the rear of the vehicle was leaking. it was due to a broken bracket which was to hold the hose in place. The hose was rubbing against the fire wall, weaken the hose.

Are you going to fix it or have someone do it?

 

[Adieu]

Huuh? Theres coolant getting circulated to the rear of the truck????

 

[ExpeditionAndy]

Huuh? Theres coolant getting circulated to the rear of the truck????

If you have the secondary rear heating and A/C then you have refrigerant and coolant. It runs down the passenger side by the frame and goes up into the rear in front of the rear wheel depending on the year of your vehicle.

 

[Will Williams]

As for fixing it I could have but without a lift and some time It would have been a difficult task for me. I paid for the repairs. Much if not all of the exhaust pipes had to be removed.

 

[Will Williams]

Big Red, 2007 expedition, had been running fine for months after getting the last coolant leak repaired. But last week I found another coolant leak. I put the vehicle on ramps but I cant see exactly where the leak is coming from. It is near the front of the vehicle on the passenger side just to the rear of the firewall....no coolant smell inside...just a slow drip.
About a month ago I sold Little Red, the 2007 Escape Hybrid, so that left me without a back up vehicle. I live in the "country"
...no Uber, cabs, bus or train station, about 30 miles from any "real" mall or stores.... I needed a backup. So I just picked up a 2017 Expedition, I will call her Black Magic. I planned to repair and keep Big Red. Now I will have so time to see if I can find the leak myself. So far I have not been able to locate the source of the leak. Any help would be appreciated.
Thanking you in advance
Will

 

[adamsdaddy]

Add dye and use the light that comes with the dye. Check the fitting on the passenger side turbo coolant line.

 

[Trainmaster]

Or get a pressure test kit for $50. Pressurize the system and the leak usually shows itself. That's how I found a leaking rear heater hose on an Explorer.