Car is 7 months old. I noticed a few months ago the smell of coolant when starting the car in the morning. Took it to the dealer and they say I need a new heater core. I have read on the internet that worn engine mounts allow the engine to move more than normal which can damage the heater core connections. Although I don't have worn mounts, I still have the stock RMM which is known for allowing a lot of engine movement and I'm wondering if this may have contributed to the heater core failing. Anyone else have a similar experience?