We need to install a new rear heater hose on our van and are not sure how too do it

I've done this many times
You will need a tubing cutter
Screwdriver
I think a 7 or 8mm socket
hose clamps
the appropriate amount of heater hose
zip ties

cut the steel heater line at the front in a place you can get access to,leave yourself enough steel hose on the rear to allow you to put the heater hose on cut off the steel hose and discard, and use 2 hose clamps on either end do the same for the other heater hose,this way is cheap and easy and permanant.Be sure that when you run the heater hose keep it away from hot or moving parts,use the zip ties to fasten it along the way,this should take about a half hour or so depending on your skills and working conditions,remember to buy some antifreeze to top up the system because you are going to spill some,remember to clean any spills animals love it and it is deadly.

Here is a step by step instructins to replace your rear heater hose. please do not forget to rate and comment about your experience with fixya today. Removal & Installation

1. Disconnect the negative battery cable.
   
2. Partially drain the cooling system into a clean container for reuse.
   
3. Remove the right rear quarter trim panel by removing or disconnecting the following:
   
   • 1st row seat
     
   • 2nd row seat, if equipped
     
   • Sliding door sill trim panel and the quarter trim bolster
     
   • C-pillar and D-pillar trim panels
     
   • 1st row seat belt anchor and the 2nd row seat anchor, if equipped
     
   • Quarter trim-to-quarter panel screws from the bolster area
     
   • Quarter trim’s rear edge-to-bracket screws
     
   • Quarter trim-to-quarter panel hidden clips, located rearward of the sliding door
     
   • Quarter trim from the quarter panel
     
   • Electrical connector from the accessory power outlet, if equipped
     
   • If equipped, pass the 2nd row seat belt through the slot in the trim panel.
     
   • Pass the 1st row seat belt through the slot in the trim panel.
     
   • Remove the quarter trim panel from the vehicle.
     
4. Remove the rear auxiliary heater hoses clamps from the rear heater core.
   
5. Remove the rear heater hoses from the rear heater core.
   
6. Remove the rear heater core-to-chassis screws.
   
7. Carefully lift the rear heater core and tubes up and out of the rear auxiliary housing.
   View of the right quarter and D-trim panels
   Click to Enlarge we need to install a new rear heater hose on our v - 93113g99.gif src="/uploads/images/93113g99.gif" alt="93113g99.gif" class="h_mi" /> View of the rear heater core
   Click to Enlarge

1. Carefully, install the rear heater core into the rear auxiliary housing.
   
2. Install the rear heater core-to-chassis screws.
   
3. Install the rear heater hoses to the rear heater core.
   
4. Install the rear auxiliary heater hoses clamps to the rear heater core.
   
5. Install the right rear quarter trim panel by performing the following procedure:
   
   • Install the quarter trim panel to the vehicle.
     
   • Pass the 1st row seat belt through the slot in the trim panel.
     
   • If equipped, pass the 2nd row seat belt through the slot in the trim panel.
     
   • If equipped, connect the electrical connector to the accessory power outlet.
     
   • Install the quarter trim to the quarter panel.
     
   • Rearward of the sliding door, connect the quarter trim-to-quarter panel hidden clips.
     
   • Install the quarter trim’s rear edge-to-bracket screws.
     
   • At the bolster area, install the quarter trim-to-quarter panel screws.
     
   • Install the 1st row seat belt anchor and the 2nd row seat anchor, if equipped.
     
   • Install the C-pillar and D-pillar trim panels.
     
   • Install the quarter trim bolster and the sliding door sill trim panel.
     
   • If equipped, install the 2nd row seat.
     
   • Install the 1st row seat.
     
6. Refill the cooling system.
   
7. Connect the negative battery cable.
   
8. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
   
   NOTE If the rear heater core was emptied and not refilled, it will be necessary to thermal cycle the vehicle twice. Run the engine until the thermostat opens; then, turn the engine OFF and allow it to cool.