Ford F-350 Super Duty oil cooler replaced but still experiencing coolant smell in cabin on Ford F-350 Super Duty

Some Ford F-350 Super Duty owners report experiencing a persistent coolant smell in the cabin after replacing the oil cooler, which could indicate several underlying issues. One common cause is a heater core leak, allowing coolant to pool in the vent system and create a noticeable odor. Additionally, a small leak in the cooling system, whether from the radiator, hoses, heater core, or gaskets, can lead to this problem even if the vehicle is not overheating. Some owners also find that a faulty heater core can contribute to the smell, often accompanied by symptoms like wet carpets or foggy windows. Moreover, issues such as a jammed thermostat stuck in the open position may cause an antifreeze smell without visible leaks. To resolve the coolant smell issue, it is crucial for owners to inspect these components thoroughly and seek professional assistance if the problem persists.