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We have a 2004 Kia Sedona that has about 75,000 miles on and we had a leak in the heater lines going to the rear heater. The emergency fix was to disconnect the rear heater and loop it around the heater. That worked but still had a leak problem. Have discovered now that it may be a blown head gasket. The local KIA dealership says that it is going to cost $2000 to replace both gaskets (more than 11 hours of labor) but we may want to consider a reconditioned engine instead because if the head is warpped then it will have to be replaced at a cost of 5000 dollars. Does this make sense
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if the rest of the vehicle is in good shape,, and you have knowledge of motors,, fix it, my Kia has 250k plus on it, so its well worth it, as long as the vehicle as a whole is in good shape
your rear cooler lines are leaking-they rust out(very common)the cooler lines are sold as a kit-include both going to rear-youll have to call around for quotes-when i worked at a kia dealer the repair was around $400-$600
This could be a serious problem. Check your coolant level, then check the rear heater lines that supply coolant to the rear heater. They run under the van, over time they rust and leak. Because it is under and to the rear of the van it is hard to notice, i.e. coolant puddles and smell. But please note that this engine has aluminum cylinder heads and does not take kindly to being overheated.
It sounds like a corroded line running to the rear heater core. If you're mechanically inclined, you can definitely replace it yourself. I would reccomend replacing both lines, as the material Kia originally used is very prone to corrosion. They realized this and now the replacement parts are much higher quality, mostly rubber and no more pot metal.
many vans have rear heater cores for added passenger comfort, so this is not unusual, it is very possiable either the hoses or there connections to the rear eater core are leaking or the heater core itself is leaking.
Check your rear coolant lines, These lines always rust and start leaking coolant and thats why your engine over heats and you dont get any heat inside your car. This is a common problem with kia sedona that have rear A/C and Heater. There are two fixes to this problem. The first is to replace the rear heater coolant lines with the updated lines from kia. The second will be bypassing the rear coolant lines with a hose, however the rear heater will not work with this method.
removing the rear coolant lines is not that easy. The lines near the fire wall are really hard to remove. Its also much easier to replace the lines with the car on a hoist.
hope that helpfull
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