The JDP Motorsports 2010-2011 Camaro SS Heater Hose 2012 Update is now available, and here is the do-it-yourself instructions for installation.
This relocation of the heater hoses from on top of the intake manifold to the passenger frame rail is beneficial for a couple reasons. It keeps the hot hoses from possibly heating the intake manifold and therefore heating the intake air, which reduces power. It also makes the engine bay look much more professional and clean without the awkward hoses flopped on top.
Catch bucket or similar
Long needle nose pliers or similar
Long hose pliers (if available)
Knife (if needed)
10mm 1/4" deep socket
1. Remove the engine cover (if present) by removing the oil filler cap, lifting the front of the cover, and pulling forward and up. Reinstall oil cap.
2. Locate where the heater hoses attach to the engine (on the passenger front of the engine). Place a bucket or something underneath this area to catch the coolant that will fall from this area. Approximately 1 gallon of coolant will be lost. You can reuse the coolant, but may get contaminated by debris on the engine and subframe, so it is advised to fill with fresh coolant.
3. Using long pliers or clamp pliers, release the clamps on each hose and pull back approximately 2 inches from the end of the hose. You can also choose to cut the hoses off, but will obviously be worthless if you ever wanted to go back.
4. Using some adjustable pliers twist each hose to break them loose from the water pump.
5. Once they can twist without much effort, carefully and slowly (to avoid a large mess) twist and pull the front hose off, you can adjust how far the hose comes off to meter the flow of coolant. You can let a bit come out, then put the hose back on, and check underneath the car to determine where the coolant falls, and if your bucket is catching as much as possible.
6. Once coolant mostly stops draining from the front hose, remove the rear hose in the same manner. Some coolant will come out, but not as much as before.
7. Now that this end is detached, move to the firewall where they attach to the heater core pipes. With some long pliers grab the outermost hose's clamp and move it to a manageable location to release and pull it back a few inches, similar to the engine side.
8. With that clamp away, again try to twist the hose to break it loose from the pipe, then remove the hose. Some coolant will come out, but not very much. Be very careful though, you do not want to crush or deform the pipe, it is very soft and will easily do so. If you have them available, some long pliers with rounded end works great.
Often times, these hoses will be very tight and you will not be able to break them loose this way, without damaging the heater core pipes. The only way around this is to cut the hoses off. Make a slit in the hose length-wise from the end of the hose down a couple inches. Don't cut the heater core pipe, but get as much through the hose as you can, then it will be much easier to break the hose loose.
9. Once the outer hose is gone, do the same thing to the inner hose, then remove the old heater hoses. You will most likely have to disconnect the evap hose that goes to the passenger side valve cover, and route it out of the heater hoses.
10. ]Now, on the passenger side frame rail, there is a heat shield with a few nuts and retainers holding it down. Remove the 2 10mm nuts on the forward end of it (one on top, and one approximately 6 inches beneath it), and remove the black plastic retainer at the back (it can be removed by twisting it counter-clockwise to unscrew it from its post). With these removed, pull the heat shield away from the frame a couple inches, towards the engine.
11. Take your new heater hoses, and on the bracket, there is a little tab sticking out. Bend that down flush with the rest of the bracket.
12.Find the fuel line and evap line that go from the engine to the passenger side frame rail, connected down into more pipes. Do not disconnect these, but on the evap hose (the one forward on the engine, connecting to the rear hose on the frame), pull it out of its little clasp, right near the dipstick, which will allow the evap hose to be raised.
13. Now grab the flexible portion of fuel line, and the loosened evap line, and gently pull them up, and slide the new heater hose assembly into place, from the front of the car, under both these hoses, and back as far as you can to the fire wall.
Set the heater hoses down to rest on the frame rail, between the heat shield and piping, and release the evap and fuel lines. (The forward most rubber hoses on the new heater hoses will be bent upwards.) Reattach the evap hose to its clasp.
14. Now take the lower rubber heater hose and route it underneath the various wiring harnesses to be free in the open, level with the rest of the heater hose assembly.
Now do the same with the other rubber hose.
Ensure they are both underneath the wiring harnesses, and are not tweaked in any way. Both hose ends will naturally now be resting near the water pump hose connections.