obermd· Premium Member
masterchf117, I highlighted the critical portion of your post. Based on this I would have your dealership look into PI-0935, which replaces the HVAC duct control box with a new box. The culprit is a glycol based lubricant used that when it heats up it smells very similar to DexCool. The replacement box uses a new lubricant. The fact that you get no smell with some vents and smell with others it a clear indication that the problem is in the HVAC system and not in the engine bay. If it was in the engine bay you would get the smell regardless of the direction of the air flow.I have the same coolant smell issue. I took it to the dealer and they did the same fix as in your video, but their hose only went just beneath the engine. They also installed new seals around near the rear of the hood. I am still getting the coolant smell once I have reached operating temperature, but I only get it if I have the heat on and the lower vents running. If I run the heat and only have on the front vents I get no smell at all. Any ideas why this may be?
I am taking it back to the dealer tomorrow. Not sure what else they may do, but I am going to extend the hose length to go further back under the car if they do not. I'll update with any breakthroughs.