Hearer supply line

Hello jb5148m-- Two days ago I had the same question that you did, and I saw your post while searching on the Internet. I couldn't find any advice so I tacked it myself. My rear heater pipes had rusted through on the bottom and I lost my coolant. I bought a new aftermarket pipe and hose assembly for about $100, but getting the old one out with all of its pipes, welds, brackets, and bends proved to be complicated. To allow working room I had to remove the air intake plenum, the throttle body and all of its hoses and connections, the battery, and disconnect the exhaust pipe from the rear manifold and slide it over out of the way. The intake plenum has a bracket on the bottom rear that holds some tie-downs for wiring. You have to remove two bolts with a 15mm wrench working underneath, up through the access tunnel where the exhaust pipe passes through to remove this bracket. You also have to remove a plate that braces the alternator to the plenum. Once all of that "stuff" is loose / removed, you can twist and turn and pull and sweat to get that crooked pipe assembly out and the new one back in. It was difficult, but now it is fixed and it looks "factory". This is still a great van with 180,000 miles on it. If I could buy a new one just like it, I would. Hope this helps.

Hello caradiodoc-- when you mentioned "o-rings" and "quick disconnects" I thought you might be talking about a newer model van. My 1999 model has standard 5/8" heater hoses with hose clamps that join the steel pipes (which I replaced) to the aluminum pipes under the car. The small 9" sections of heater hose are located below the passenger seat floor.

. And I forgot to mention something else I disconnected when removing the intake air plenum. I had to un-bolt the coil pack and lay it aside.

From:jb5148m, I spent 4 days removing the tubling lines, was doing the job for my son-in law, he had another car, therefore, there was no hurry. Below is how I did the job, it came out OK, Van been running good for over six weeks.
Mechanic at the Chrysler Dealership said they removed the windshield wiper arms, complete linkage, motor assembly,
it all comes out as a complete unit, remove about 6 bolts, 4 nuts, one plug, one hose, easy removable. Gives you a lot more room, still could not get the heater supply and return tubing line out, (steel line not a hose), used a sawall, cut the steel tubing line. I'm in the process of replacing chrysler part number 4677557AA, heater supply and return tubling line for rear heater on 3.8 litre engine. Chrysler cost: $366.00, I shopped the web, found an aftermarket, from rockauto, dorman, p/n: 626300, price $70.79. The different is Chrysler upgraded their part from steel to aluminum tubling. The aftermarker is as original made of steel. Therefore, it does not bend, this is why you can not easily remove or replaced the part. With the complete wiper assembly removed, I still could not fit the part in, I, removed the intake manifold. Again, it was not difficult, 2 bolts, 2 nuts, 2 nuts on back side of intake, disconnect EGR pipe, some plugs, and hoses. More time consuming than work.
Will need to purchase a new intake manifold gasket, and EGR gasket. They will likely try to sell you an intake manifold gasket kit for $19.99, you only need one gasket out of this kit. I had to go to three auto part stores. At Advance Auto, purchase Fel-Pro MS 94566, 48163, intake manifold upper set Chrysler V-6 3.8L, this set include the EGR gasket, set cost $2.99. Once, I got the intake manifold off, the rear heater supply & return tubing line went in smoothly. I'm sending you this info, so as, you can pass it along to anyone else who has this problem.

I'm facing the same prospect on my 1999 Voyager. I have the part and will start in the morning. Any special advice? 310,000 miles and counting!

Thanks to all (Caradiodoc, Megawat54, Jb5148m) for your posts and sharing. To make a long story short, your instructions were just the ticket for me to access the rear heater hose assembly (the metal tubes running along the firewall) for my 1999 Plymouth Voyager minivan (3.3L flex fuel). Once I got the intake plenum off, I was able to maneuver the hose assembly out of the cavity and lift it free. I have 310K miles and still going strong on original engine and drive train. I'm happy with my Voyager!. Note to others: the above also applies to 1997, 1998, and 2000 Voyager, Caravan, and Town & Country minivans. The instructions at the following link were also helpful (although they were intended to access the spark plugs, they got me to the right place). http://cardealerforums.com/rec-autos-makers-chrysler/t133436-1999-chrysler-town-country-t-c-lxi-3-8-spark-plug-remove-andreplace-job.html