About a month and 1/2 ago I had to replace the rear heater coolant pipes now the pipe under the engine has rotted out.
Anyone else had this part fail. I don't think I ever changed one of these before.
I'm pretty sure this van came from the East before I bought it but it isn't really rusty underneath.
The brake lines better not be next!
Grrrr....

 

Me too lost failed at 70k kms, not covered under warranty!

 

I had to replace a section of mine on both (to/from) the rear heat at the part under the passenger seat. I was going to put in the whole stock pipe from the dealership, but when I found the cost and labor involved, I said no way. Instead, I cut out the bad section and replaced it with rubber heater hose; cost me about $5 or so and works fine, been just over a year now with no issues. I see now I have a rust spot on the section in the engine compartment, so the whole shebang may be in my future. I question why they ever thought it would be a good idea to use steel tubing in the first place. Oh well, not the first design quirck I've found on my van.

 

i had this problem and know how expesive that part is what i did is i bought ten feet of 5/8 heater hose two tee fittings and about seven or eight hose clamps and replaced the intire thing with hose, this repair is a whole lot cheaper and requires the same amount of work as the oem part to replace and guess what rubber doesn't rott like steel does.
my big suggestion is to remove the wiper assembly (vert east to do, about fifteen minutes) and to note which line the check valve is and be sure to reuse or you could wind up with some nasty air block problem.
good luck guys