Rear Heater Pipes/hoses

miccus1 · 04-22-2006, 05:43 PM

Thought I would share this piece of advice with any Sedona owners. I have been having a few problems with coolant loss and subsequent overheating on my 2.9 diesel SX. Although the needle never went past the 3/4 mark I now have either a bowed or cracked cylinder head which will be very expensive to repair. The original cause of this coolant loss appears to be leaking rear heater pipes. These run from front to back under the car. My mechanic tells me these are made up of rubber hoses and metal pipes, which come out from the factory unprotected. The metal corrodes quite quickly and mine had started leaking before 4 years old, although I didn't know. He told me this is a very common Sedona problem. I was caught out on a motorway with overheating after which it was established that they were on the verge of disentgrating. They were replaced but it was too late for the head. Advice given to me was to regularly replace the pipes as they always fail eventually, this costs about £150 though and I didn't even know I had a rear heater! If you don't use it some people advise bypassing the rear heater altogether and doing away with the pipework. Anyway, that's my tip for saving yourself a lot of grief, check your heater pipes!

Murphwiz · 04-22-2006, 06:43 PM

Very common problem on earlier models, although later pipes have been modified to cut down on this problem.

seacam · 04-22-2006, 07:34 PM

Hello Murphwiz,

How early is early?.
seacam

Murphwiz · 04-23-2006, 06:54 AM

around 2002ish and below.

cpapashley · 04-23-2006, 07:22 AM

Sorry but I couldn't help but notice that date. 2002ish. That seems to be a very important date for KIA. Just like Australia's engine problem. Seems that Hyundai has made a difference.

Anyway hope your engine can be repaired cheaper than mine can over hear in aussie land (kv6 design pre 2002).

All the best from downunder

Ashley

54FLX · 06-08-2006, 10:45 AM

Just realised this is the same topic as my problem Here and mines a 54 plate so it still looks like this issue has not been resolved. A stainless setup would be much better.

Stands back and lights the blue touch paper.

Murphwiz Modified??? How??? Painted??? Thats no good if the pipes are not prepared correctly first.

Need to find my charger for my camera so I can post a picture..

Murphwiz · 06-08-2006, 01:51 PM

I have to say in this case it appears your just unlucky?

It's been a while since I changed a set of pipes, used to be a 2-3 time weekly thing.

cpapashley · 06-08-2006, 05:43 PM

Quote:

Originally posted by Murphwiz@Apr 23 2006, 08:43 AM
Very common problem on earlier models, although later pipes have been modified to cut down on this problem.

Quoted post

Murphwiz,

Just so I can understand this problem.

What is wrong with the pipes that they corrode. What has been changed so it doesn't happen after 2002.

And finally what is the extent of the problems. ie all models, worldwide to 2002.

Esses · 06-11-2006, 08:00 AM

I would hazard a guess that this would be more a problem in snowy places like UK/USA. Do they still use salt on the roads over there? Our '05 is COATED in black "tar" on the underbody, anti-rust treatment I think. It's on everything, including the heater pipes. They shouldn't corrode from the inside. It IS coolant in there, not straight water.

54FLX · 06-12-2006, 05:18 AM

Esses

The authorities use loads of rock salt around us during the winter and this last winter there was quite alot. Because in the UK winters it can be sunny one day rainy the next and then freeze overnight, they have to constantly reapply the rocksalt to the roads.

The underside of the car has the underseal type gue all over it except on the pipes leading to the rear heater. They are black but deffinately not undercoated, it looks like a very thin layer of smoothrite type stuff on it. Nothing more.

Murphwiz

Still waiting to hear from you what exactly has supposed to have been, in your words "modified" please.

Thanks