Had just replaced the crank shaft position sensor, the barometric/IAT combo sensor, burped the little baby and took it out for a test drive. No heat after reaching the halfway mark on the temperature gauge. Returned home and checked OBD2....no code. I replaced the thermostat, put it back together following the torque guides and burped it. Started it and allowed it to come up to temperature, and heat returned. Took it out for a test drive, got about 6 miles down the road and the temperature started climbing fast. Pulled over and had the vehicle towed back to the house. I noticed the thermostat housing was leaking antifreeze. Upon closer examination, I noticed the water temperature control assembly was leaking at the thermostat housing. The torque value wasn't quite right. Damn.

Replaced the water temperature control assembly flushed the coolant, filled it up with 50/50 antifreeze, and burped it. The heat would not come on. The air bubbles would not stop. The engine was starting to overheat again. Turned the engine off and plugged the OBD2 and now it was reporting a P0346 Camshaft Position Sensor A Circuit Range/Performance Bank 2. I couldn't find any wire damage the plug looked good and was wondering why it didn't report this code when there was no heat the first time. So started searching the net and found that this vehicle had an engine failure a couple of years ago.

It was miserable and unsafe to drive when our heat went out in the middle of winter. Our windshield wouldn't defrost, so we didn't have visibility. Also it was sooooo cold to be in a car that was like -5 degrees to 10 degrees for exended time in the middle of winter. We took this to the Emitch Kia dealership and they told us we needed to do the following things to fix the problem:

1. Replace Timing Cover 2. Get a Coolant Flush

We also did the following things: 3. Get a Break Fluid Flush 4. Engine Air Fliter 5. Cabin Filter

The price tag at the Emitch Kia dealer was about $3,600, so I texted a friend who manages a shop to ask how much he would charge. He sent us a quote for $2,293.41 and we went ahead and did the work. When we got the car back, the heat still didn't work! When I told our friend that the heat didn't work, he said the fixes we did wouldn't have fixed the heat. It ended up that it is a blown gasket head and now we need to spend another $4K ish.