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First you have to determine if this is the hose or the connection to the heater core itself. This can be difficult to do. You should get a pressure testing machine for automotive cooling systems and use it. When you pressurize the system you can see where the leak is exactly. If it is hoses that are bad you can replace them. If it is the pipe that connects to the core (the nipple) then you need the whole core. When you replace the items that are bad you need to use permatex on the connection to be sure it wont leak again.
That's the return pipe to the pump from the heeater core.It's leaking at the pump? Is it leaking from the hose that's clamped on,do you think? That is probably a pressed fitiing into the pump and if it is leaking around the fitting, and the pump has over 30,000 miles on it, I'd just bite the bullet and replace the pump. I know.....on a 3.8 it isn't the easiest job. (:^) don-ohio
this should be the heater core,is the pipe itsself bad or is it just the hose needing replaced?does heat work,is the passengers floorboard wet with coolant?could be the hose bad or the heater core bad,some cars have whats called a heater control valve right there at the firewall that the hoses hook up to,it could be bad,if hoses just hook up to two pipes sticking out of firewall,check hoses first,then look in passengers floor to see if its wet,heater core is inexspensive but costly to have replaced.
The problem is the heater core leaking behind the dashboard.
Heater CoreRemoval & Installation1997-2002To Remove: NOTE: Heater core must be vacuum leak tested before it is remove from vehicle if a heater core leak is suspected.
Drain engine coolant.
Remove instrument panel.
For 5.4L (4V), if quipped, remove junction splash shield.
For 5.4L (4V), if quipped, disconnect starter relay cable.
For 5.4L (4V), if quipped, remove junction block bracket.
Clamp inlet and outlet heater hoses.
Disconnect heater hose from heater core by gently pressing it toward heater core.
Remove A/C plenum demister adapter.
Disconnect vacuum line.
Remove 13 plenum chamber top screws.
Remove blend door assembly from case.
Remove heater core.
To Install: NOTE: If needed, clean and lubricate coolant hoses with plain water.
Install heater core.
Install blend door assembly to case.
Install 13 plenum chamber top screws.
Connect vacuum line.
Install A/C plenum demister adapter.
Connect heater hose to heater core.
Release all clamps from inlet and outlet heater hoses.
For 5.4L (4V), if quipped, install junction block bracket.
For 5.4L (4V), if quipped, connect starter relay cable.
For 5.4L (4V), if quipped, install junction splash shield.
ford courier workhorse ,great van ---right when engine is hot feel the hoses that run into the heater ,also it could be the heater core was leaking and someone has joined the hoses together .if the hoses are connected and they are hot then ,try removing them and then flushing the heater with a hose pipe
The inlet/outlet pipes (tubing) is an integral part of the heater core. If the actual core is leaking, you 'll need to remove and replace or repair the heater core. Be sure it's not the hose that is failing ... alot easier and cheaper to change out a hose and clamps...
Sounds like one of the connections to the heater core are leaking. Should be hoses connecting to the metal heater core pipes. The heater core is on the inside of the car with metal pipes going through the firewall to heater hoses.
Drain the engine coolant into a suitable container.
the instrument panel glove compartment. Push in on the sides of the
compartment to release it, allowing access to the heater core.
The heater core can be damaged if too much force is applied to the heater core pipes during hose removal.
the heater module screws and remove the heater module assembly cover.
For vehicles equipped with A/C, remove the air conditioning evaporator
temperature sensor assembly from the heater and A/C cover.
Remove the heater core screw and clamp.
Remove the hose pipe clamp screw and the hose pipe clamp. Clamp off the heater hoses.
Fig. 1: Heater hose and pipe routing-3.4L engineFig. 2: Heater hose and pipe routing-3.8L engineFig. 3: Heater hose and pipe routing-5.7L engine
Disconnect the heater hoses from the pipes.
Remove the heater core by carefully pulling it towards you.
Fig. 4: Exploded view of the heater core removed from the heater module assemblyTo install:
Install the heater core and attach the heater hose assembly to the heater hose pipes. Note the following:
Lubricate the heater core pipes with petroleum jelly for ease of installation and to assure a good seal.
Be sure the seals around the heater pipes remain in place when installing.
verify that the seal is installed correctly, observe the seal from
inside the engine compartment. If the seal has leaks, apply a sealer
between the heater core pipes and the evaporator housing.
the hose pipe clamp and the bolt/screw. Unclamp the heater hoses.
Tighten the hose pipe clamp bolt/screw to 16 inch lbs. (1.8 Nm).
Install the heater core clamp and screw. Tighten the screw to 16 inch lbs. (1.8 Nm).
Install the heater module assembly cover and secure with the retaining screws. Tighten the screws to 18 inch lbs. (2 Nm).
Connect the negative battery cable.
Refill the cooling system. Operate the engine and check for leaks, add coolant if necessary.